Compact Odd Cylinder V-Type Engine

Patentamt

JEuropaischesEuropean Patent Office ® Publication number: 0 095 250 ^ 1 Office européen des brevets

m EUROPEAN PATENT SPECIFICATION

@) Compact odd cylinder V-type engine.

(§) Priority: 24.05.82 US 381 075 @ Proprietor: GENERAL MOTORS CORPORATION, General Motors Building 3044 West Grand Boulevard, Détroit Michigan 48202 (US) Date of publication of application: 30.1 1.83 Bulletin 83/48 Inventor: Gill, Lloyd Thomas, P.O. Box 159, Okemos Michigan 48864 (US) @ Publication of the grant of the patent : 14.08.85 Bulletin 85/33 ® Représentative: Haines, Arthur Donald et al, GM Patent Section Luton Office (F6) P.O. Box No. 3 Kimpton Road, @ Designated Contracting States: Luton, Beds. LU2 OSY (GB) DE FR GB

Références cited: DE-A-3121 302 US-A-4054108

o 10 M 10 0) O Q Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be f iled in a written reasoned g% statement. It shall not be deemed to have been filed until the opposition fee has been paid (Art. 99(1) European patent convention). ACTORUM AG with the combustion chambers of each of the cylinders to deliver fuel thereto. Compact drive means Technical Field are provided to drive the injection pump from the engine camshaft to provide fuel charges to the cyl- This invention relates to V-type internal com- inders on a timed cyclic basis related to the opera- bustion engines and more particularly to a novel tional cycle of the engine. The combined structure compact arrangement for V-type engines having forms the basis of a compact engine package an odd number of cylinders to provide space for an adaptable for installation in relatively small engine engine driven mechanism at one end of a shorter compartments of automotive vehicles. cylinder bank. These and other features and advantages of the invention will be more fully understood and appre- Background ciated from the following description of a specific embodiment taken together with the accompany- In the prior art relating to internal combustion ing drawings. engines it has been common to construct V-type engines having two V-arranged banks each defin- Brief Drawing Description ing an equal number of longitudinally aligned cylinders disposed generally opposite one another. In the drawings: Usually, the cylinders of one bank are offset slight- Fig. 1 is a pictorial view of a five cylinder V-type ly to the rear of those of the other to provide for diesel engine assembly of compact configuration connection of the pistons of the opposite cylinder in accordance with the invention; banks with adjacent crankpin areas of the engine Fig. 2 is a plan view from the plane indicated by crankshaft. the line 2-2 of Fig. 1 with certain of the engine With such V-type engines it is known to provide components deleted for clarity; various engine auxiliary and accessory devices Fig. 3 is a partial rear end view from the plane which may be mounted in suitable convenient indicated by the line 3-3 of Fig. 1, with certain of locations on the sides, front and rear of the engine the components deleted; as well as between the cylinder banks where pos- Fig. 4 is a top plan view of the engine cylinder sible, all as may be permitted by the space available block from the plane indicated by the line 4-4 of for mounting the engine and its associated com- Fig. 3; ponents. In the case of automotive engine com- Fig. 5 is a fragmentary cross-sectional view of partments for some of the current models of com- the injection pump drive arrangement taken in the pact and subcompact vehicles, the engine com- plane indicated by the line 5-5 of Fig. 3; partment space is relatively small, restricting the Fig. 6 is a fragmentary transverse cross-section- size and configuration of engine arrangements al view of the oil pump drive mechanism from the which may be suitably mounted within the engine plane indicated by the line 6-6 of Fig. 5, and compartments of such vehicles. Fig. 7 is a cross-sectional view of the pump drive gears from the plane indicated by the line 7-7 of Summary of the Invention Fig. 6.

The present invention provides a novel engine Detailed Description arrangement providing a package of unusual com- pactness for mounting in the relatively crowded Referring now to the drawings in detail, there is engine compartments of today's vehicles. A feat- shown in illustration of a specific embodiment of ure of the invention is that it provides a V-type the invention an internal combustion engine cylinder bank arrangement defining an odd num- generally indicated by numeral 10. Engine 10 is a ber of cylinders arranged in longer and shorter cyl- five cylinder 60° V-type diesel engine having a cylinder banks with one less cylinder in the shorter inder block 11. The cylinder block defines left and bank. Another feature is that a space is provided at right cylinder banks 12, 14 respectively arranged one end of the shorter cylinder bank and generally with a relative bank angle of 60° and each includ- opposite one ofthe cylinders of the longer bank for ing a plurality of longitudinally aligned cylinders. mounting an engine driven mechanism without In the present embodiment the left cylinder greatly increasing the required length of the overall bank 12 defines three aligned cylinders. The right engine arrangement. Still another feature is that cylinder bank 14 defines only two aligned cylin- the engine driven mechanism is driven directly by ders lying generally opposite, but slightly offset the engine camshaft through novel and compact toward the rear of the engine from, the front two drive means. cylinders of the left bank. A mounting boss 15 In a specific embodiment the engine comprises supporting a diesel fuel injection pump 16 is a five cylindre V-type diesel engine having long provided on the cylinder block behind the right and short cylinder banks containing three and two cylinder bank 14 and generally opposite, though cylinders respectively. A space behind the short offset rearwardly, from the rear cylinder of the left cylinder bank and generally opposite the rear cyl- bank. The ends of the cylinders are closed by left inder of the long bank is utilized for receiving the and right bank cylinder heads 18, 19 respectively diesel fuel injection pump which is connected by which are provided with rocker covers 20, 22 re- fuel lines with injection nozzles communicating spectively. The cylinder heads and their respective rocker covers are considered, from the standpoint cover an opening 56 in the rear end wall through of the succeeding description and claims, to be which the gears 51, 52 may be installed. included as part of the respective cylinder banks to The novel drive arrangement for the fuel injec- which they are attached. tion pump further includes a driven spiral bevel The engine is additionally provided with a num- gear 57 rotatably journalled on bearings 58 in an ber of externally mounted components or accesso- adapter 59 for rotation on an axis 60 extending ries including a water pump 23, air conditioning normal to the axis of the camshaft 42 with the teeth compressor 24, vacuum pump 26, alternating cur- of the driven gear 57 engaging those of the drive rent generator 27, and other pulley connected de- gear 52. A snap ring 61 engages one of the bear- vices driven through a single serpentine multi- ings 58 and a groove in the end of gear 57 distal groove drive belt 28 by a pulley 29 mounted on the from the gear teeth to retain the gear and adapter end of the engine crankshaft 30. An electrical star- in assembly. The adapter 59 is seated on the ter 31 and an oil filter and mounting body 32 are mounting boss 15 and received in an opening 62 mounted alongside the cylinder block. within boss 15, extending downwardly within the block the camshaft. The transverse The engine package also includes a compact cylinder to wall 47 is 63 clearance for ram tube plenum type air intake manifold 34 cut away at to provide the face of the driven 57 which extends mounted between the cylinder banks and support- gear across the wall and thus ing various associated components. The manifold closely adjacent the rear cam 44, arrangement is disclosed in detail in ourcopending providing a close coupled rear drive arrangement. European patent application EP-A No. 0095251 The fuel injection pump 16 is fixedly secured to filed contemporaneously with this application. Ex- the upper end of the adapter 59 and includes a haust manifolds, such as left bank manifold 35, are pilot protrusion 64 that carries a seal 66 and from carried by the cylinder heads on the outboard sides which there extends an end of a drive shaft 67 for of the cylinder banks. the injection pump. Shaft 67 carries an externally splined member 68 that internal spli- The crankshaft 30 is rotatably supported in the engages 70 formed within the driven 57 to lower portion of the block 11 in nes gear provide cylinder conven- for the tional fashion and includes of crank driving injection pump directly upon rota- a plurality tion of 57. Oil for the and throws not shown, that con-' gear lubricating gear having crankpins, are is drilled nected by rods 36 with 38, spline assembly provided through a pas- connecting pistons one 71 in the 59 from oil in each of the The sage adapter a pressure gal- engine cylinders. pistons, 72 in the block. together with the and de- lery engine cylinder cylinders cylinder heads, in- fine combustion chambers that include The compact gear drive arrangement also portions cludes an oil drive the not shown within the cylinder heads. Convention- pump including gear 51 carried the camshaft, which drives a helical 74 al not shown, provided in the heads for on gear means, are carried rotatable shaft 75 that extends receiving air charges from the intake manifold and on a through the cylinder block into the crankcase for conducting burned gases out to the exhaust manifolds. connection with an oil pump not shown. The driven helical 74 the drive 51 at In addition fuel gear engages gear injection nozzles 39 carried in a point angularly spaced about the camshaft axis the cylinder heads communicate with the in- from the axis 60 of the injection pump drive gear to dividual combustion for each chambers, one cylin- permit the compact arrangement of oil and injec- der, to deliver fuel charges thereto. High pressure tion pump drive means provided. fuel lines 40 connect between the fuel injection In the specific embodiment illustrated, it is ap- 16 and the individual injection nozzles 39 to pump parent that a very compact V-type engine package for the timed of the fuel in provide delivery charges has been provided utilizing an arrangement having conventional manner. cylinder banks of different lengths with an unequal As is best shown in Fig. 5-7, the engine cylinder number of cylinders, so as to provide space behind block carries a camshaft 42 which is rotatably jour- the shorter bank for mounting the fuel injection nalled on a longitudinal axis lying parallel with and pump in a location substantially occupying space above the crankshaft and driven therefrom which would have been occupied by another through conventional means, such as a front engine cylinder in a conventional V-type engine mounted timing chain not shown. Camshaft 42 having an even number of cylinders. Further to includes a plurality of spaced pairs of cams 43, 44 accommodate this arrangement, the intake mani- provided for operating the additional valve gear, fold inlet end is suitably offset to one side of the not shown, for the individual engine cylinders. fuel injection pump location. Also, a novel com- Adjacent the rearmost cam 44, the camshaft is pact drive arrangement is provided for driving from supported by a sleeve bearing 46 carried in a trans- the engine camshaft the fuel injection pump and verse wall 47 of the engine cylinder block and the engine oil pump with a minimum of added engaging a journal 48 of the camshaft. Aft of this length of the engine assembly behind the rearmost journal, the camshaft is provided with a keyed end of the valve gear actuating cams. 50 on which are mounted a helical oil pump drive Lubrication of the thrust bearing 54, provided gear 51 and a spiral bevel injection pump drive behind the injection pump drive gear 52 to take the gear 52. The rear face of the spiral bevel gear thrust developed by this gear and the oil pump engages a thrust bearing 54 that is supported by a drive gear together, is provided from a drilled oil cap 55 secured on the engine cylinder block to passage 76 in the wall 47. The oil is directed through the sleeve bearing to a groove 78 in the said additional cylinder of the other bank (12), camshaft journal 48, then through drilled pass- whereby a compact arrangement of the engine cyl- ages 79 and 80 in the camshaft and a companion inders and the associated fuel injection pump (16) passage 82 in the bolt 83 that engages a washer 84 is provided. to retain the gear 52 on the end 50 of the camshaft. 3. A compact internal combustion engine ac- From the passage 82, the oil passes into a recess in cording to Claim 2, characterised in that the gener- the cap 55 and is directed therefrom to the thrust ally opposite cylinders of the two cylinder bearing 54. banks (12, 14) are longitudinally offset to one While the invention has been described by re- another to permit connection of the respective pis- ference to a specific embodiment comprising a 60° tons (38) to longitudinally offset crankpin areas of V-type diesel engine, it should be apparent that the the crankshaft (30), said frame (11) further sup- invention could be applied in numerous other ports a camshaft (42) extending parallel with the forms and types of engine arrangements. For ex- crankshaft (30) between the cylinder banks (12, ample a spark ignition engine could be utilized in 14) and having thereon longitudinally spaced an arrangement where an ignition distributor or cams (43, 44) engaging suitable valve actuating other mechanism driven by the engine was mount- mechanism for controlling the timed induction of ed in the space provided in the disclosed embodi- air charges to and exhaust of burned gases from ment for the engine fuel injection pump. Other the engine cylinders, said camshaft (42) being op- bank angles coul likewise be provided. Also, var- eratively connected with the crankshaft (30) for ious odd numbered V-type cylinder arrangements driving the camshaft (42) in timed relation to the could be utilized. engine operating cycle, said fuel injection pump (16) being drivingly connected with an end (50) of the camshaft (42) through drive means (52) adjacent to the cams (44) that actuate the valve gear of said additional cylinder of the 1. A compact internal combustion engine com- longer cylinder bank (12). prising a frame (11) supporting a crankshaft (30) 4. A compact internal combustion engine ac- for rotation on a longitudinal axis and defining two cording to any one of the preceding claims, banks (12, 14) of longitudinally aligned cylinders characterised in that the engine driven mechanism radiating in V-fashion from a common axis, and comprises a fuel injection pump (16) mounted on pistons (38) in the cylinders and connected with the engine frame (11), said pump (16) having a respectively aligned throws of the crankshaft (30) drive shaft (67) with its rotational axis lying in a for driving the pistons (38) in timed reciprocating plane normal to a camshaft (42) of the engine and motion in the cylinders on a predetermined operat- inwardly of the adjacent end of the engine frame ing cycle, characterised in that the total number of (11) and the corresponding end (50) of the cam- said cylinders is an odd number, one (14) of said shaft (42), bearing means (46) supporting the cylinder banks being shorter and having one less camshaft (42) inwardly of said adjacent end (50), cylinder than the other (12), the cylinder banks a driving bevel gear (52) mounted on the end (50) being arranged to leave a space not containing a of the camshaft (42) outward of said bearing cylinder at one end of the shorter bank and in means (46) and a driven bevel gear (57) drivingly generally opposite lateral relation to one of the cyl- connected with the pump drive shaft (67) and inders of the other bank, and there is an engine engaging the driving bevel gear (52) at the driven mechanism (16) connected with each of end (50) of the camshaft (42) to provide a driving the cylinders and operative to time a repetitive connection between the camshaft (42) and the function in the cylinders in relation to the engine injection pump (16), said driven bevel gear (57) operating cycle, said mechanism (16) being dis- lying along one side of the camshaft (42) inwardly posed in said space not containing a cylinder lying of the driving bevel gear (52) and extending in- at said one end of the shorter cylinder bank (14) wardly beyond said adjacent camshaft bearing and in generally opposite lateral relation to said means (46) but maintaining clearance therefrom one cylinder of the other bank, whereby a compact and from associated valve gear-actuating arrangement of the engine cylinders and asso- cams (43, 44) on the camshaft (42) beyond said ciated mechanism (16) is provided. camshaft bearing means (46), whereby a close 2. A compact internal combustion engine ac- coupled pump mounting and camshaft carried cording to Claim 1, characterised in that the engine drive are provided. is a diesel internal combustion engine (10) and the 5. A compact internal combustion engine ac- engine driven mechanism is an engine driven fuel cording to Claim 4, characterised in that a helical injection pump (16) connected with injection drive gear (51) is mounted on the camshaft (42) nozzles (39) at each of the cylinders and operative between the bearing mounting means (46) and to provide repetitive delivery of fuel charges into the bevel drive gear (52) mounted on the end (50) the cylinders in timed relation with the operating of the camshaft (42), said helical drive gear (51) cycle, said injection pump (16) being disposed on being engaged with a helical driven gear (74) dis- the side of the engine frame having the shorter posed beside the camshaft (42) at a location bank of cylinders (14) and in said space not con- angularly offset from the axis of the fuel injection taining a cylinder lying at the end of said shorter pump (16) to provide a spaced relationship be- bank and in generally opposite lateral relation to tween the helical driven gear (74) and the adjacent bevel driven gear (57) of the fuel injection in zeitlich abgestimmter Beziehung mit dem Be- pump (16), said helical driven gear (74) being op- triebszyklus, wobei die Einspritzpumpe (16) an eratively connected with an engine oil pump for der Seite des Motorrahmens mit der kürzeren Rei- drivingly operating said engine oil pump. henanordnung aus Zylindern (14) und in dem an 6. A compact internal combustion engine ac- dem Ende der kürzeren Reihenanordnung liegen- cording to Claim 4 or 5, characterised in that there den, keinen Zylinder enthaltenden Raum und in is an adapter (59) provided in said engine allgemein seitlich gegenüberliegender Beziehung frame (11) and supporting said fuel injection zu dem zusätzlichen Zylinder der anderen Reihe- pump (16), said adapter (59) journalling said nanordnung (12) angeordnet ist, wodurch eine driven bevel gear (57) within bearings (58) kompakte Anordnung der Motorzylinder und der provided in the adapter (59) and means (61) zugeordneten Treibstoff-Einspritzpumpe (16) ge- maintaining said adapter (59), driven bevel schaffen ist. gear (57) and injection pump (16) in assembly, 3. Ein kompakter Brennkraftmotor nach An- said adapter (59) including oil passage spruch 2, dadurch gekennzeichnet, dass die allge- means (71) communicating with adjacent oil feed mein gegenüberliegenden Zylinder der beiden Zy- passages (72) of the engine frame (11) for distri- linder-Reihenanordnungen (12, 14) in Längs- buting lubricating oil to the supporting bear- richtung gegeneinander versetzt sind, um eine ings (58) of the driven bevel gear (57) and the Verbindung der jeweiligen Kolben (38) mit den in associated components. Längsrichtung versetzten Kurbelstift-Bereichen der Kurbelwelle (30) zu ermöglichen, dass der Rahmen (11) weiter eine sich parallel zur Kurbel- welle (30) erstreckende Nockenwelle (42) zwischen den Zylinder-Reihenanordnungen (12,14) 1. Ein kompakter Brennkraftmotor mit einem abstützt, die an sich in Längsrichtung mit Abstand Rahmen (11), der eine Kurbelwelle (30) um eine versehene Nocken (43, 44) trägt, die jeweils mit Längsachse drehbar abstützt und zwei Reihenan- dem entsprechenden Ventil-Betätigungsmecha- ordnungen (12, 14) von in Längsrichtung ausge- nismus in Eingriff stehen, um die zeitlich abge- richteten Zylindern bestimmt, die V-förmig von ei- stimmte Einführung von Luftladungen in die Mo- ner gemeinsamen Achse abstehen, und mit Kol- torzylinder und das Auslassen von verbrannten ben (38) in den Zylindern, die mit jeweils ausge- Gasen aus den Motorzylindern zu steuern, wobei richteten Kröpfungen der Kurbelwelle (30) zum die Nockenwelle (42) wirksam mit der Kurbelwel- Antrieb der Kolben (38) in zeitabgestimmter Hin- le (30) zum Antrieb der Nockenwelle (42) in zeit- und Herbewegung in den Zylindern in einem vor- lich abgestimmter Beziehung zu dem Motorbe- bestimmten Betätigungszyklus verbunden sind, triebszyklus verbunden ist, die Treibstoff-Ein- dadurch gekennzeichnet, dass die Gesamtzahl der spritzpumpe (16) antriebsmässig mit einem Zylinder eine ungerade Zahl ist, dass eine (14) der Ende (50) der Nockenwelle (42) durch Antriebs- Zylinder-Reihenanordnungen kürzer ist und einen mittel (52) benachbart zu den Nocken (44) ver- Zylinder weniger besitzt als die andere (12), dass bunden ist, die den Ventiltrieb deszusätzlichen Zy- die Zylinder-Reihenanordnungen so angeordnet linders der längeren Zylinder-Reihenanord- sind, dass ein keinen Zylinder enthaltender Raum nung (12) betätigen. an dem einen Ende der kürzeren Reihenanordnung 4. Ein kompakter Brennkraftmotor nach einem gelassen ist und in allgemein einander entgegen- der vorangehenden Ansprüche, dadurch gekenn- liegender Beziehung zu einem der Zylinder der an- zeichnet, dass der motorgetriebene Mechanismus deren Reihenanordnung, und dass ein motorge- eine an dem Motorrahmen (11) angebrachte Ein- triebener Mechanismus (16) mit jedem der Zylin- spritzpumpe (16) enthält, dass die Pumpe (16) der verbunden ist und zum zeitlichen Abstimmen eine Antriebswelle (67) besitzt, deren Drehachse einer sich wiederholenden Funktion in den Zylin- in einer zu einer Nockenwelle (42) des Motors dern bezüglich des Motor-Betriebszyklus betätig- senkrechten Ebene und innerhalb des benachbar- bar ist, wobei der Mechanismus (16) in dem kei- ten Endes des Motorrahmens (11) und des ent- nen Zylinder enthaltenden, an dem einen Ende der sprechenden Endes (50) der Nockenwelle (42) kürzeren Zylinder-Reihenanordnung (14) liegen- liegt, wobei Lagermitte (46) die Nockenwelle (42) den Raum und in allgemein gegenüberliegender nach innen von dem benachbarten Ende (50) ab- Seitenbeziehung zu dem einen Zylinder der ande- stützen, ein Antriebs-Kegelzahnrad (52) an dem ren Reihenanordnung angeordnet ist, wodurch Ende (50) der Nockenwelle (42) ausserhalb der eine kompakte Auslegung der Motorzylinder und Lagermittel (46) angebracht ist und ein angetrie- des zugehörigen Mechanismus (16) geschaffen benes Kegelzahnrad (57) antriebsmässig mit der ist. Pumpenantriebswelle (67) und in Eingriff mit dem 2. Ein kompakter Brennkraftmotor nach An- Antriebskegelzahnrad (52) an dem Ende (50) der spruch 1, dadurch gekennzeichnet, dass der Motor Nockenwelle (42) verbunden ist, um eine An- ein Diesel-Brennkraftmotor (10) ist und dass der triebsverbindung zwischen der Nockenwelle (42) motorgetriebene Mechanismus eine motorgetrie- und der Einspritzpumpe (16) zu schaffen, dass an- bene, mit Einspritzdüsen (39) bei jedem der Zylin- getriebene Kegelzahnrad (57) längs einer Seite der der verbundene Treibstoff-Einspritzpumpe (16) Nockenwelle (42) innerhalb von dem Antriebske- ist, betätigbar zur Schaffung einer wiederholten gelzahnrad (52) liegt und sich nach innen über das Zuführung von Treibstoffladungen in die Zylinder benachbarte Nockenwellen-Lagermittel (46) er- streckt, jedoch einen Freiraum von diesem und von relié à chacun des cylindres et permettant de den zugehörigen Ventiltrieb-Betätigungsnok- synchroniser une fonction répétitive dans les ken (43,44) an der Nockenwelle (42) jenseits der cylindres en rapport avec le cylindre de fonction- Nockenwellen-Lagermittel (46) einhält, wodurch nement du moteur, ledit mécanisme (16) étant eine enggekoppelte Pumpenanbringung und ein disposé dans ledit espace ne contenant pas de cy- durch die Nockenwelle getragener Antrieb ge- lindre, s'étendant à ladite extrémité de la ligne de schaffen sind. cylindres la plus courte (14), et de façon sensible- 5. Ein kompakter Brennkraftmotor nach An- ment opposée latéralement par rapport audit cylin- spruch 4, dadurch gekennzeichnet, dass ein dre de l'autre ligne, pour obtenir une disposition Schnecken-Antriebszahnrad (51) an der Nocken- compacte des cylindres du moteur et des mécanis- welle (42) zwischen den Lager-Befestigungsmit- mes associés (16). teln (46) und dem an dem Ende (50) der Nocken- 2. Moteur à combustion interne compact sui- welle (42) befestigten Kegel-Antriebszahn- vant la revendication 1, caractérisé en ce que le rad (52) befestigt ist, dass das Schnecken- moteur est un moteur à combustion interne die- Antriebszahnrad (51) in Eingriff mit einem neben sel (10) et le mécanisme entraîné par le moteur, der Nockenwelle (42) an einer in Winkelrichtung une pompe à injection de carburant (16) entraînée gegen die Achse der Brennstoff-Einspritzpum- par le moteur, reliée par des injecteurs (39) à cha- pe (16) versetzten Stelle angeordneten angetrie- cun des cylindres et permettant d'effectuer un ap- benen Schneckenzahnrad (74) in Eingriff ist, um port répétitif de doses de carburant dans les cylin- eine Abstands-Beziehung zwischen dem ange- dres, synchronisé avec le cycle de fonctionnement, triebenen Schneckenzahnrad (74) und dem be- ladite pompe à injection (16) étant disposée sur le nachbarten angetriebenen Kegelzahnrad (57) der côté du châssis du moteur ayant la ligne de cylin- Brennstoff-Einspritzpumpe (16) zu schaffen, wo- dres la plus courte et dans ledit espace ne conte- bei das angetriebene Schneckenzahnrad (74) nant pas de cylindre, s'étendant à l'extrémité de la wirksam mit einer Motorölpumpe zur Antriebsbe- ligne la plus courte, et de façon sensiblement op- tätigung der Motorölpumpe verbunden ist. posée latéralement par rapport audit cylindre addi- 6. Ein kompakter Brennkraftmotor nach An- tionnel de l'autre rangée (12), pour obtenir une spruch 4 oder 5, dadurch gekennzeichnet, dass in disposition compacte des cylindres du moteur et dem Motorrahmen (11) ein Adapter (59) vorgese- de la pompe à injection de carburant asso- hen ist und die Brennstoff-Einspritzpumpe (16) ciée (16). abstützt, dass der Adapter (59) das angetriebene 3. Moteur à combustion interne compact sui- Kegelzahnrad (57) in in dem Adapter (59) vorge- vant la revendication 2, caractérisé en ce que les sehenen Lagern (58) drehbar lagert und dass Mit- cylindres sensiblement opposés des deux rangées tel (61) vorgesehen sind, die den Adapter (59), de cylindres (12, 14) sont décalés longitudinale- das angetriebene Kegelzahnrad (57) und die Ein- ment l'un par rapport à l'autre pour permettre la spritzpumpe (16) in einer Anordnung halten, wo- connexion des pistons respectifs (38) aux zones bei der Adapter (59) ÖI-Durchleitmitel (71) ent- du vilebrequin (30) comportant des manetons, hält, die mit benachbarten Ölzuführdurchleitun- décalés longitudinalement, que ledit châssis (11) gen (72) des Motorrahmens (11) in Verbindung supporte en plus un arbre à cames (42) parallèle au stehen, um Schmieröl zu den Stützlagern (58) des vilebrequin (30) entre les rangées de cylin- angetriebenen Kegelzahnrades (57) und der zuge- dres (12, 14) ayant des cames longitudinalement hörigen Bestandteile zu verteilen. espacées (43,44) qui sont en prise avec un méca- nisme approprié de commande de soupapes pour commander l'introduction synchronisée des doses d'air et, dans les cylindres du moteur, l'échappe- 1. Moteur à combustion interne compact com- ment des gaz brûlés provenant des cylindres du prenant un châssis (11) supportant un vilebre- moteur, ledit arbre à cames (42) étant relié pour quin (30) monté rotatif autour d'un axe longitudi- son fonctionnement avec le vilebrequin (30) pour nal et définissant deux lignes (12,14) de cylindres entraîner l'arbre à cames (42) de façon synchroni- alignés longitudinalement, disposés radialement sée par rapport au cycle de fonctionnement du mo- en V depuis un axe commun, et des pistons (38) teur, ladite pompe d'injection de carburant (16) dans les cylindres reliés aux manivelles alignées, étant reliée pour son entraînement à une extré- respectives du vilebrequin (30) pour entraîner les mité (50) de l'arbre à cames (42) par l'intermé- pistons (38) en un mouvement alternatif synchro- diaire de moyens d'entraînement (52) voisins des nisé dans les cylindres, avec un cycle de fonction- cames (44) qui actionnent les mécanismes des nement prédéterminé, caractérisé en ce que le soupapes du cylindre supplémentaire de la rangée nombre total desdits cylindres est un nombre im- de cylindres la plus longue (12). pair, l'une (14) des lignes de cylindres étant plus 4. Moteur à combustion interne compact suivant courte et ayant un cylindre de moins que l'au- l'une quelconque des revendications précédentes, tre (12), les lignes de cylindres étant disposées caractérisé en ce que le mécanisme entraîné par le pour laisser un espace ne contenant pas de cylin- moteur comprend une pompe à injection de carbu- dre à une extrémité de la ligne la plus courte et de rant (16) montée sur le châssis du moteur (11), façon sensiblement opposée latéralement par rap- ladite pompe (16) ayant un arbre d'entraîne- port à l'un des cylindres de l'autre ligne, et qu'il ment (67) avec son axe de rotation s'étendant existe un mécanisme entraîné par le moteur (16) dans un plan perpendiculaire à un arbre à cames (42) du moteur, vers l'intérieur de l'extrémité montage du palier (46) et l'engrenage d'entraîne- adjacente du châsiss du moteur (11 ) et vers l'ex- ment conique (52) monté sur l'extrémité (50) de trémité correspondante (50) de l'arbre à ca- l'arbre à cames (42), ledit engrenage d'entraîne- mes (42), des moyens formant palier (46) suppor- ment hélicoïdal (51 ) étant en prise avec un engre- tant l'arbre à cames (42) vers l'intérieur de ladite nage entraîné hélicoïdal (74) disposé à côté de extrémité adjacente (50), un engrenage d'entraî- l'arbre à cames (42) en un endroit angulairement nementconique (52)montésur l'extrémité (50) de décalé par rapport à l'axe de la pompe d'injection l'arbre à cames (42) à l'extérieur desdits moyens de carburant (16) afin de créer un espacement en- formant palier (46) et un engrenage entraîné coni- tre l'engrenage entraîné hélicoïdal (74) et l'engre- que (57) en liaison d'entraînement avec l'arbre nage conique adjacent (57) d'entraînement de la d'entraînement de pompe (67) et en prise avec pompe à injection de carburant (16), ledit engre- l'engrenage d'entraînement conique (52) à l'ex- nage entraîné hélicoïdal (74) étant connecté de trémité (50) de l'arbre à cames (42) afin de fournir façon fonctionnelle avec une pompe à huile du une liaison d'entraînement entre l'arbre à ca- moteur pour faire fonctionner ladite pompe à huile mes (42) et la pompe à injection (16), ledit engre- du moteur en assurant son entraînement. nage entraîné conique (57) étant disposé le long 6. Moteur à combustion interne compact sui- d'un côté de l'arbre à cames (42) vers l'intérieur de vant la revendication 4 ou 5, caractérisé en ce l'engrenage d'entraînement conique (52) et qu'un adaptateur (59) est disposé dans ledit châs- s'étendant vers l'intérieur au-delà des moyens ad- sis (11 ) du moteur et supporte la pompe à injection jacents formant palier (46) pour l'arbre à cames, en de carburant (16), l'adaptateur (59) assurant le maintenant, cependant,. un espace libre par rap- montage tourillonnant de l'engrenage conique port à ces moyens et par rapport aux cames d'acti- (57) entraîné à l'intérieur de paliers (58) prévus vation des mécanismes de soupapes associées dans l'adaptateur (59) et des moyens (61 ) mainte- (43, 44) sur l'arbre à cames (42), au-delà desdits nant ledit adaptateur (59), l'engrenage entraîné moyens formant palier (46) pour l'arbre à cames, conique (57) et la pompe à injection (16) assem- pour obtenir un montage de la pompe à couplage blés, ledit adaptateur (59) incluant des moyens de rapproché et un entraînement supporté par l'arbre passage d'huile (71) communiquant avec des pas- à cames. sages d'alimentation en huile adjacents (72) du 5. Moteur à combustion interne compact sui- châssis du moteur (11) afin de distribuer l'huile de vant la revendication 4, caractérisé en ce qu'un lubrification aux paliers de support (58) de l'en- engrenage d'entraînement hélicoïdal (51 ) est grenage entraîné conique (57) et aux éléments as- monté sur l'arbre à cames (42) entre les moyens de sociés.