DOCSLIB.ORG

Multiple Valve Internal Combustion Engine Vielfachventilbrennkraftmaschine Moteur a Combustion Interne a Multiples Soupapes

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Multiple Valve Internal Combustion Engine Vielfachventilbrennkraftmaschine Moteur a Combustion Interne a Multiples Soupapes Europaisches Patentamt (19) European Patent Office Office europeenpeen des brevets EP 0 499 268 B1 (12) EUROPEAN PATENT SPECIFICATION (45) Date of publication and mention (51) intci.e: F02F 1/42, F02B 61/02 of the grant of the patent: 08.05.1996 Bulletin 1996/19 (21) Application number: 92102501.1 (22) Date of filing: 14.02.1992 (54) Multiple valve internal combustion engine Vielfachventilbrennkraftmaschine Moteur a combustion interne a multiples soupapes (84) Designated Contracting States: (72) Inventors: DE ES FR GB IT Kaneko Mamoru 2500 Shingai Iwata-Shi Shizuoka-Ken 438 (JP) (30) Priority: 15.02.1991 JP 44310/91 Nonogawa Kenichi 2500 Shingai Iwata-Shi Shizuoka-Ken 438 (JP) (43) Date of publication of application: 19.08.1992 Bulletin 1992/34 (74) Representative: Griinecker, Kinkeldey, Stockmair & Schwanhausser Anwaltssozietat (73) Proprietor: YAMAHA HATSUDOKI KABUSHIKI Maximilianstrasse 58 KAISHA 80538 Miinchen (DE) Iwata-shi Shizuoka-ken, 438 (JP) (56) References cited: US-A- 4 627 400 US-A- 4 683 855 DO 00 CO CM O) O) ^- Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice the Patent Office of the Notice of shall be filed in o to European opposition to European patent granted. opposition a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. a. 99(1) European Patent Convention). LU Printed by Jouve, 75001 PARIS (FR) 1 EP 0 499 26858 B1 2 Description connecting passage is arranged perpendicularly with re- spect to the direction of flow of the fluid. The present invention relates the multiple valve in- Further examples of staged induction systems are ternal combustion engine comprising a cylinder head disclosed in US-A-4617896, US-A-4683855, JP-A- having at least three intake valves per cylinder and a s 61186726 and JP-A-62-93122. Moreover, by means of staged induction system having at least two intake pas- constructional measures attempts have already been sages serving the intake valve seat openings of the cyl- made to improve the volumetric efficiency of charging inder head and charge forming means and an intercon- the combustion chamber, providing a good turbulence necting passage connecting at least two of said intake and swirl action of the charge introduced therein (US-A- passages. 10 4971008, JP-A-63-25369, JP-A-1 -1 39079, JP-A- It is acknowledged that the performance of an inter- 1-95572, JP-A-62-12771, EP-A-430258, EP-A-430259, nal combustion engine can be improved, particularly at EP-A-430263). high speeds, by the use of multiple intake valves. Al- As such an intake device in which a swirl is obtain- though four valve per cylinder engines are quite com- able in a low engine speed region, there is known a de- mon, there are a number of advantages of employing 15 vice in which the above first to third intake valve open- five valve per cylinder with three intake valves. The ex- ings are led outward and connected at their midways to cellent breathing capacity of a five valve engine is well a common intake passage and in which one fuel injec- acknowledged. However, because of the good breath- tion valve is provided in the common intake passage and ing capacity of five valve engines, these engines may an open-close valve which is opened only in a high en- have a tendency to have poor performance at low and 20 gine speed stage is provided in one of the intake pas- mid-range speeds. The reason for this is that the flow sages, as described in Japanese Published Unexam- velocity through the three intake passages under these ined Utility Model Application No. Sho-61 -186726. running conditions is extremely low and poor combus- Moreover, an intake device has been proposed in tion and fuel vaporization can result. It has been, there- which a first intake passage in fluid communication with fore, been proposed to provide some staging system so 25 one of the above intake valve openings and a second that the effective intake area of the engine is reduced intake passage in fluid communication with the other, when operating at low and mid-range speeds. two intake valve openings are provided and in which a Although such staging systems significantly im- carburetor is independently provided in each of the first prove the performance of the engine at low speeds, they and second intake passages so that the air-fuel mixture do give rise to some difficulties. For example, if the stag- 30 is fed through the first intake passage only in a low en- ing is accomplished by providing a throttle valve in each gine speed region but is fed through both of the first and intake passage, then the cylinder head porting configu- second intake passages in a middle or high engine ration and throttle valve arrangement can become com- speed region (see, for example, Japanese Patent Ap- plicated. If, on the other hand, two of the intake passag- plication No. Hei-1 -309466). es are siamesed and the third is left separate and a th rot- 35 In addition to the porting considerations previously tie valve is provided only the siamesed passage, it has described, the use of multiple intake valves, particularly been noted that mid-range performance can deterio- if staging is employed, can give rise to certain difficulties rate. That is, it has been found with such an arrange- in connection with the associated charge forming sys- ment that there may be a dip in the torque curve of the tem. Specifically, if fuel injection and specifically port fuel engine at mid-range. Since this is a commonly operated 40 injection is employed and a staged induction system is speed range for the engine, such an arrangement may also incorporated, then it is very difficult to utilize a single not be acceptable. fuel injector for spraying fuel into all of the intake pas- It has been discovered, however, that this problem sages. This can present some problems even if staging with mid-range performance can be overcome by pro- is not employed because it is difficult to position an in- viding at least some communication between the intake 45 jector and have its spray nozzle in such an orientation ports even though they are basically separated. How- to insure that a uniform mixture is supplied to the com- ever, this can present some problems in connection with bustion chamber under all running conditions. Alterna- the forming of the interconnecting passageway and tively, even if stratification is desired, the mixture alloca- keeping it close to the intake valve seats, where it is tion within the combustion chamber can be difficult. most effective so Therefore, the objective of the present invention to A multiple valve internal combustion engine of the provide a multiple valve internal combustion engine of type mentioned at the beginning is known from US-A-4 the defined on the preamble of claim 1, having an en- 627 400. In said prior art the interconnecting passage is hanced staged induction allowing improved swirl action arranged transversely to the intake passages, which of the intake charge specifically under mid range engine with respect to the direction of flow of the charge coming 55 running conditions in order to obtain an optimum per- from the carburettor causes fluid flowing though said in- formance of the engine under all running conditions. terconnecting passage to perform an overall 90° turn. According to the present invention the above objec- Moreover, in said known engine the inlet of said inter- tive is obtained by a multiple valve internal combustion 2 3 EP 0 499 268 B1 4 engine of the type defined in the preamble of claim 1 DETAILED DESCRIPTION OF THE PREFERRED wherein the interconnecting passage is disposed within EMBODIMENTS OF THE INVENTION the cylinder head extending adjacent to and towards a centre valve seat allowing the amount of the charge sup- Referring first to Figure 1 , a motorcycle powered by plied to said centre valve seat to be varied in response 5 an internal combustion engine constructed in accord- to the load conditions of the engine. ance with an embodiment of the invention is identified According to a preferred embodiment of the present generally by the reference numeral 21 . The invention is invention the cylinder head defines a combustion cham- described in conjunction with a motorcycle since it has ber and at least three intake valve seats therein and a particular utility in conjunction with such this type of ve- pair of separate inlet openings are formed, preferably in 10 hide. It is to be understood, however, that certain facets another surface of the cylinder head, and first and sec- of the invention may be utilized in conjunction with in- ond intake passages formed in the cylinder head extend ternal combustion engines that power other types of ve- from the respective one of said inlet openings to the hicles or, for that matter, other applications for internal valve seats wherein one side valve seat is served by the combustion engines. first intake passage while the other two valve seats, is The motorcycle 21 includes a welded frame assem- namely a center valve seat and another side valve seat bly 22 having a head pipe 23 that journals a front fork are served by the common Siamese type second intake 24 for steering movement. A front wheel (not shown) is passage. Moreover, the interconnection passage is pro- journaled by the front fork 24 in a known manner.
Load more

Recommended publications
  • Where the Rubber Meets the Road ……. Part III the Cylinder Head by Dave Barnett Vintage MG Club of Southern California
    Where the Rubber Meets the Road ……. Part III The Cylinder Head By Dave Barnett Vintage MG Club of Southern California "The Torque Output of an The inherent design characteristics of Engine is limited by just how a stock XPAG cylinder head effectively we can make it There is no question that the cylinder Breathe" David Vizard 1985 head is where the power is made, it is in fact the "Heart and Soul" of the engine. The design of the XPAG head dates back to September of 1939 and was first used on the TB. There are two basic design types. The "early" "Banana Head" with short 1/2-inch spark plugs. Then starting with XPAG/TD2/22735 a round water hole head with used with longer-reach 3/4-inch plugs. The thickness of a stock TC head is 76.65mm (3.018-inches) TD and TF XPAG 75.16mm (2.959-inch) TF XPEG 76.75mm (3.021-inch) (Source: MG Racers News Letter Code 106 by Mike Lewis, Bayou Racing) This month I will cover the XPAG Understanding that in its simplest form, cylinder head. We will examine stock and the XPAG engine is nothing more or less than modified heads, to increase power, reliability an air pump. A useful step toward appreciating and yes even economy. For most of us, an engines ultimate power limitation is air flow. rebuilding and modifying the cylinder head When an engines ability to draw in more air should be left up to experienced engine with increasing R.P.M. ceases, so does the rise builders.
    [Show full text]
  • F69ATC Multi Purpose CNC Maching Center with Automatic Tool Changer
    F69ATC Multi Purpose CNC Maching Center with Automatic Tool Changer Machining Equipment Created for Performance Racing & Engine Remanufacturing. So Advanced, It’s Simple. F69ATC MULTI-PURPOSE CNC MACHING CENTER Windows Operating System Rottler uses Windows Touch Screen Technology through 19” (483mm) touch panel. The Windows software has many advantages such as a common user reduces operator learning curve. Touch Screen Control Automatic Tool Changer INDUSTRY EXCLUSIVE The 24 Space Automatic Tool Changer Two Operating Systems! for CAT40 Taper can handle up to a 10" 1: Rottler System for simple, fast and easy (250mm)diameter tool weighing programming of common jobs such as boring, 15.5 lbs (7kgs). surfacing and line boring. Anyone can learn in a few hours! Spindle 2: Rottler CAM System for advanced CNC Super hard finish resists wear for years of programming for making parts, engraving operation. 0-5000 RPM Spindle Rotation names, and much more. with quick change CAT40 Taper. Electronic Hand Wheel Vertical Box Way Offers operator infinite control of machine Precision Ground, Hardened Box Way movement in all axes for quick and easy Slideways are 28" (700mm) wide for setup. Also controls variable feed rate during increased rigidity and years of heavy duty automatic cycles. production machining. Brushless Servo Motors with Sliding Side Doors BISS Encoders Side doors slide up for access, reducing The F69ATC has the latest technology servo footprint. motors with BISS encoders offering 100 times finer resolution compared to previous models. Chip Auger These new Servo motors give maximum Automatically removes chips from enclosure torque and performance throughout the RPM and deposits chips in wheeled disposal cart.
    [Show full text]
  • Part Number 8120
    WEIAND BBC “TRACK WARRIOR” INTAKE MANIFOLD P/N 7620 - Oval Port, 4150 Square Bore Carb P/N 7621 - Oval Port, 4500 Dominator™ Carb P/N 7622 - Rectangle Port, 4150 Square Bore Carb P/N 7623 - Rectangle Port, 4500 Dominator™ Carb INTAKE MANIFOLD INSTALLATION INSTRUCTIONS – 199R10374 APPLICATIONS: WEIAND TRACK WARRIOR intake manifolds 7620-7623 are designed for Mark IV-VI, 396-502 cid Big Block Chevrolet engines equipped with standard Oval (7620 & 7621) or Rectangle (7622 & 7623) port cylinder heads with standard deck height applications for both 4150 square bore and 4500 Dominator™ carburetor configurations. These manifolds will also work with any BBC equipped with aftermarket cylinder heads, as long as they have standard Oval or Rectangle port flange openings and bolt hole locations. These single-plane intake manifolds are designed for high-performance engine applications up to 540 cubic inch displacement and maximum engine speeds of 7000-8000 rpm, depending on the engine combinations. TRACK WARRIOR intake manifolds are intended for maximum performance applications and may not accept stock components and hardware. They may not fit under an unmodified hood for many vehicle applications. EMISSIONS EQUIPMENT: TRACK WARRIOR intake manifolds do not accept any emission-control devices, hot-air, or divorced chokes. This part is not legal for sale or use for motor vehicles with pollution-controlled equipment. DIMENSIONS: A-B Height – A – 5.96” (front), B - 5.96” (rear). NOTE: Measured from front and rear manifold end seal surfaces. Oval Port Size – 1.87” High x 1.60” Wide Rectangular Port Size – 2.28” High x 1.48” Wide BEFORE YOU BEGIN INSTALLATION: The following installation instructions must be carefully read and understood before you begin installation.
    [Show full text]
  • Cosworth Head/Pinto Block Camshaft Drive
    turned down to allow the fitting of a Sierra Cosworth-type auxiliary drive sprocket. While the standard Cosworth drive belt is almost always adequate, stronger belts are available. Burton Power, for example, offers a high strength belt which has carbon-fibre in it. These belts are slightly wider than the standard ones but still fit the standard drive sprockets. CYLINDER HEAD PORTING Caution! - The porting work (to the dimensions which follow) must by carried out by an experienced professional as, in some areas, wall thickness gets thin and a mistake could cause breakthrough. The inlet valve guides do not need to be removed Auxiliary driveshaft (left) nose has been turned down to take a genuine Sierra Cosworth during porting work but there's no sprocket (right). piston pin retention method can be used. The crown of the piston will, of course, be 1.5mm down the bore more than usual, since the Cosworth connecting rods are 1.5mm longer. The block can be planed to increase the compression (1.5mm/0.060in with complete safety). If 11.8 to 1 or 12 to 1 pistons are fitted into a standard Pinto short assembly, the fact that the piston crowns are down the bore means that a sometimes useful reduc- tion in compression is the result. The Inlet port with right-hand tract opened out. planing of the block by 1.0mm/ 0.040inch might well prove to be a more appropriate amount. COSWORTH HEAD/PINTO BLOCK CAMSHAFT DRIVE MODIFICATIONS If a Sierra Cosworth cylinder head is fitted to a Pinto block the crankshaft sprocket has to be changed to a Sierra Cosworth-type to suit the Cosworth drivebelt (which must be used) and the Pinto auxiliary shaft will have to be Completed inlet port viewed from manifold end..
    [Show full text]
  • 2015 Price List
    2015 Price List Block Machining Competition Head Work Clean 60.00 Competition Multi-Angle valve job 325.00 Tap oil holes & install restrictors SBC or BBC 36.50 Assemble & Set installed height 60.00 Clearance block for rods Hourly Rate Back cut valves (each) 5.00 Resize Block (up to .060) Cut for teflon seals 50.00 4 Cylinder 100.00 Cut for oversize springs diameter only 65.00 6 Cylinder 125.00 Machine for screw-in studs 165.00 8 Cylinder 150.00 canted heads 200.00 Street Finish Cylinder Honing Install bronze guides & wet hone to size 230.00 4 Cylinder 150.00 Cylinder Head Porting Price on Request 6 Cylinder 175.00 8 Cylinder 200.00 Competition Engine Services **Discount: $40 for bore and File-fit rings 75.00 hone combination Blueprinting Price on Request Side Clearance Rods Price on Request Competition Block Machining Degree Cam Price on Request Bore 8 Cylinder (up to .060) 150.00 C.C. Heads Hourly Rate Competition Hone with Plates 325.00 Custom Engine Assembly Price on Request **Discount: $40 for bore and 435.00 Check Bearing Clearances Price on Request hone combination Deck square mains with fixture 200.00 Replace Seats Install sleeve (labor) 165.00 Set up & first seat 30.00 Install cam bearings 65.00 Each Additional Seat 16.00 Install freeze plugs (each) 3.00 Line hone (touch-in) 175.00 Head Re-Surfacing includes cut caps 200.00 4 Cylinder Line hone damaged blocks Hourly Rate Cast Iron 60.00 Sonic check block 120.00 Aluminum 60.00 Set Main Bearing Clearance 60.00 Straight 6 Cylinder Cast Iron 70.00 Crankshaft Services Aluminum 70.00
    [Show full text]
  • Americanrider2.Pdf
    ELECTRONICALLY REPRINTED FROM DAVE MACKIE ENGINEERING 64: MAINTENANCE TECH: Cleanliness vs. Laziness 68: PERFORMANCE TECH: Give Your Harley a Quick Stop 71: HEY JOE: Detonation Mega Power 100 horses from Mackie’s Mega-Sphere. by Joe Minton We Harley owners like to modify Mackie “Mega- Sphere” modified our bikes’ engines, mainly to improve power. Twin Cam head That word power has about as many mean- with a set of Black Diamond ings as there are folks using it. On one valves, springs extreme the bagger rider wants the power to and retainers, all be able to pass traffic uphill, fully loaded, from made to Mackie’s specs. 50 mph—with the bike in high gear. At the other end of the performance spectrum the TT (tavern-to-tavern) pilot is more interested in hit- ting the rev limiter in each gear from one stop to the next—earth-shaking burnouts with flames and smoke. Both of these Harley owners have a hard time getting exactly what they want for a couple of reasons. First, there is the confusion about what the word power means. To one person it is the amount of peak horsepower an engine can deliver at high rpm. To another it is the ability to pass a truck going uphill in top gear. The problem is that both owners use the same word to describe two very different engine tun- Special JE ing setups. They may not get what they want, Pistons have a usually due very large to a misunderstanding between themselves squish surface and the people trying to satisfy their needs.
    [Show full text]
  • Performer RPM Cylinder Head for Gen
    GEN III and IV LS SERIES CYLINDER HEADS ® Pro Port Raw #61989, 61999, 619869, 619969 E-CNC #79939, 79949 INSTALLATION INSTRUCTIONS PLEASE study these instructions carefully before beginning this installation. Most installations can be accomplished with common tools and procedures. However, you should be familiar with and comfortable working on your vehicle. If you do not feel comfortable performing this installation, it is recommended to have the installation completed by a qualified mechanic. If you have any questions, please call our Technical Hotline at: 1-800-416-8628, 7:00 am - 5:00 pm, Pacific Standard Time, Monday through Friday. IMPORTANT NOTE: Proper installation is the responsibility of the installer. Improper installation will void your warranty and may result in poor performance and engine or vehicle damage. DESCRIPTION: E-CNC cylinder heads (#79939, 79949) are designed IMPORTANT NOTES, READ BEFORE BEGINNING INSTALLATION! for 1997 and later 5.7L LS series engines, and other third and fourth For a successful installation, the Edelbrock Cylinder Heads require some generation small-block Chevrolet V8 engines. These heads provide components other than original equipment parts. To complete your great “out-of-the-box” performance and feature CNC-ported, 215cc installation, you will need the following items: intake and 76cc exhaust ports for superior flow, and efficient 65cc CNC q Head gaskets (graphite); Right - GM #12558809, Left - GM profiled combustion chambers. Pro-Port Raw cylinder heads #61989, #12558810. Or, multi-layer steel shim (MLS) gaskets, GM 61999, 619869, 619969 require professional head preparation. These #12498544 (both sides) may also be used. NOTE: Stock 4.8L & are designed for engines with 3.900” or larger bore diameters, but will 5.3L head gaskets are NOT compatible with these cylinder heads.
    [Show full text]
  • IIIHIIII US005560331A United States Patent 19 11 Patent Number: 5,560,331 Komatsu Et Al
    IIIHIIII US005560331A United States Patent 19 11 Patent Number: 5,560,331 Komatsu et al. (45) Date of Patent: Oct. 1, 1996 54 CYLINDER HEAD FOR ENGINE 4,343,270 8/1982 Kawabe. 4,382,796 5/1983 Blanchard. 75) Inventors: Kenji Komatsu, Tomotaka Takano, 4,401,061 8/1983 Matsushita et al.. both of Iwata, Japan 4,452,194 6/1984 Watanabe et al.. 4,621,595 11/1986 Suzuki. (73) Assignee: Yamaha Hatsudoki Kabushiki Kaisha, 4,671,222 6/1987 Gallot et al. ....................... 123/90.27 Iwata, Japan 4,993,374 2/1991 Okui..................................... 123/90.27 , Jap 5,184,582 2/1993 Okui et al. ........................... 123/90.27 5,385,125 1/1995 Oyaizu et al. ....................... 123/90.27 21 Appl. No.: 559,080 FOREIGN PATENT DOCUMENTS 22 Filed: Nov. 16, 1995 981135 1/1976 Canada. Related U.S. Application Data 1571361675606 3/19395/1969 Germany.France. 62) Division of Ser. No. 438,502, May 10, 1995. 40381695156641 5/19756/1992 Japan.Germany. 30 Foreign Application Priority Data 58-44213 3/1983 Japan. 2030218 4/1980 United Kingdom. May 10, 1994 JP Japan .................................... 6-09667 2057380 4/1981 United Kingdom. (51) Int. Cl. ...................................... FO2F7/00 2204094 11/1988 United Kingdom. 52 U.S. Cl. ..................................... 123/1935; 123/195 C OTHER PUBLICATIONS 18 "eld of Search my'. E. Johnson service Manual (1977) pp. 5–1 through 5-22 plus sal as - w is a f 9.9/15 HP Water Flow Diagram. Merc 50 Parts Manual (Aug. 1979). (56) References Cited Merc 40 Parts Manual (Jul. 1979). U.S.
    [Show full text]
  • V ABSTRACT Optimizing Airflow Performance During Intake Valve
    v ABSTRACT Optimizing airflow performance during intake valve process is the main purpose for this project. Research had using two previous works as guidance and starting point to setting and achieving targeted limit of optimized airflow, 0.0201075 m³/s. modifications on inlet valve, inlet port of intake system had been done, and original cylinder head Ex5 geometry had been used before turning into 3D modeling as to achieve objective. Analysis was done in CFD simulation and experimental using SuperFlowbench machine. This analysis also reported differentiation that occurs during both analyses around 0.045 % in average where experimental result cannot achieve targeted limit due to some realistic condition. Fabrication of intake valve and intake port also were made to do analysis on experimental based on the modify design. This being done after simulation analysis, modeling design was using to be fabricated and analyze the model on flow bench machine to verify simulating result. This analysis could be used to increase efficiency of volumetric flow rate and maximizing usage of air fuel in combustion process, which reduce emission to environment. Even though air flow have been optimized on its intake valve and port, but still intake system could be improve by considering other parts of Ex5 engine such as intake manifold. vi ABSTRAK Pengoptimisan aliran udara masuk sewaktu melalui injap masuk proses merupakan matlamat utama projek ini. Kajian telah menggunakan dua projek yang sebelum ini sebagai panduan dan titik permulaan sebagai arah dalam mencapai target limit kadar isipadu udara, 0.0201075 m³/s. modifikasi ke atas injap dan laluan masuk bagi kemasukan system telah di jalankan dan geometri asal bagi kepala silinder Ex5 digunakan sebelum ditukarkan dalama bentuk 3D model.
    [Show full text]
  • Cylinder Head Porting Modifications
    Cylinder Head Porting Modifications Archon remains glycogenetic: she soups her causeries voyages too effetely? Horst soogees habitually. Barclay lever her grammatology momentously, she encarnalizing it doggone. Whp at the exhaust runner, head porting cylinder, often have been in the factors including hours of the rpms He said title he would hold me clarify on a pipe weight how but got the porting and head has already. Otherwise, shorter bits still by their application. The wind noise. Improved throttle response 'fatter' power and torque curves and peak horsepower can cargo be generated through selecting the right cylinder heads for premature engine combination. Once the porting are evenly on someone to me. As the valves open, porting is tricky business, pursue a lot of bridge have manual or forgive someone special does. Limit of head modifications are big picture has been changed. Since men first of February Edelbrock has begun moving product from Torrence to rain new rule both will written in Olive Branch where shipping to customers is already a place. These faster speeds not though allow the engine to breathe easier, you get do that. We manufacture several customers that do porting work by freight that cleanse out performed cylinders modified by the latest and greatest CNC and CAD design. NHRA Announces Updated Stock and Super Stock Cylinder. Port heads are porting and port job to. CNC Head Porting XS650 performance products. Speaking of drain holes in some head, drill with a milling machine. Will be porting modification is port head ports have been able to use on your head, specifications we all together and hand.
    [Show full text]
  • To Study Performance of Two Stroke Engine with Modified Intake System
    Deepak Bharadwaj et al. / International Journal of Engineering Science and Technology (IJEST) TO STUDY PERFORMANCE OF TWO STROKE ENGINE WITH MODIFIED INTAKE SYSTEM Deepak Bharadwaj Assistant Professor, Mechanical Engineering Department University Of Petroleum And Energy Studies,Energy Acres,PO Bidholi(via Prem Nagar) Dehradun,248007, India Email id: [email protected] NAVPRABHAT BISHT Student. B-Tech Automotive Design Engineering, University Of Petroleum And Energy Studies,Energy Acres,PO Bidholi(via Prem Nagar) Dehradun,248007, India Email id: [email protected] ASHISH SINGH Student B-Tech Automotive Design Engineering, University Of Petroleum And Energy Studies,Energy Acres,PO Bidholi(via Prem Nagar) Dehradun,248007, India Email id:[email protected] PULKIT BHARGAV Student B-Tech Automotive Design Engineering, University Of Petroleum And Energy Studies,Energy Acres,PO Bidholi(via Prem Nagar) Dehradun,248007, India Email id:[email protected] BISHAKHA Student B-Tech Automotive Design Engineering, University Of Petroleum And Energy Studies,Energy Acres,PO Bidholi(via Prem Nagar) Dehradun,248007, India Email id: [email protected] TARUN KABADWAL Student B-Tech Automotive Design Engineering, University Of Petroleum And Energy Studies,Energy Acres,PO Bidholi(via Prem Nagar) Dehradun,248007, India Email id:[email protected] ABSTRACT The two stroke engine was developed to obtain a greater output from the same size of engine. The engine mechanism eliminates the valve arrangement making it mechanically simpler. Theoretically a two stroke engine develops twice the power of a comparable four stroke engine, thus making it more compact. Getting air into an engine is the key to making power and there are many ways to increase the air flow into the engine.
    [Show full text]
  • Basic Cylinder Head Porting 1
    Basic Cylinder Head Porting 1 D.I.Y. Basic Cylinder Head Porting Here's an interesting head porting fact: In many cases, the greatest performance gain per dollar spent comes upon application of basic porting procedures to a production cylinder head. These basics can be done by any do-it-yourselfer, even those with no porting experience, using the Deluxe Porting Kit and the Gasket Removal Kit (part nos. 260001 and 260005) from the Standard Abrasives Motorsports Division, along with a die grinder and some common hand tools. There is a significant difference between basic head porting for a street- high-performance or weekend racer application and the very complex cylinder head work you see in a Pro Stock drag race motor or a NASCAR NEXTEL Cup race engine. Doing full-on race heads requires the services of an experienced cylinder head professional, so Pro Stock, It is easy for the do-it-yourselfer to port cylinder heads. NEXTEL Cup and similar heads are best left to experts. Basic head All you need is the Standard Abrasives Deluxe Porting porting, however, is easy...so easy that even beginning hot rodders can Kit, some common tools and some free time. do it well. Basic Porting Will Once your porting project turns to that, you're beyond Improve Your the scope of basic porting techniques. Engine’s Performance. Why is basic port work important to your engine's Basic cylinder head performance? It reduces the restriction in the engine's porting will improve intake and exhaust tracts. Reduce that restriction and the performance of you let more air into the cylinders.
    [Show full text]