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Engine – 2Zr-Fe Engine

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Engine – 2Zr-Fe Engine EG-2 ENGINE – 2ZR-FE ENGINE ENGINE 2ZR-FE ENGINE JDESCRIPTION D The newly developed 2ZR-FE engine is an in-line 4-cylinder, 1.8-liters, 16-valve DOHC engine. D This engine uses the Dual VVT-i (Variable Valve Timing-intelligent) system, DIS (Direct Ignition System) and ETCS-i (Electronic Throttle Control System-intelligent). They have been developed to realize high performance and fuel economy, and reduce exhaust emission. 04FEG104Y 04FEG103Y ENGINE – 2ZR-FE ENGINE EG-3 " Engine Specifications A No. of Cyls. & Arrangement 4-cylinder, In-line Valve Mechanism 16-valve DOHC, Chain Drive (with Dual VVT-i) Combustion Chamber Pentroof Type Manifolds Cross-flow Fuel System SFI Displacement cm3 (cu. in.) 1798 (109.7) Bore × Stroke mm (in.) 80.5 × 88.3 (3.17 × 3.48) Compression Ratio 10.0 : 1 98 kW @ 6000 rpmrpm MaxMax. Output*1 (SAE(SAE-NET) NET) (132 HP @ 6000 rpm) 174 N.m @ 4400 rrpmpm MaxMax. Torque*1 (SAE(SAE-NET) NET) (128 ft.lbf @ 4400 rpm) Open 1_ – 56_ BTDC Intake Close 65_ – 10_ ABDC Valve Timing Open 51_ – 11_ BBDC Exhaust Close 3_ – 43_ ATDC Firing Order 1 – 3 – 4 – 2 Octane Rating 87 or higher Oil Grade ILSAC Tailpipe Emission Regulation ULEV-II, SFTP Evaporative Emission Regulation LEV-II, ORVR Engine Service Mass*2 (Reference) 117 kg (257.9 lb) *1: Maximum output and torque ratings are determined by revised SAE J1349 standard. *2: Weight shows the figure with oil and water fully filled. EG-4 ENGINE – 2ZR-FE ENGINE " Valve Timing A : Intake Valve Opening Angle : Exhaust Valve Opening Angle Intake VVT-i TDC Operation Range 1_ 3_ 43_ 56_ 65_ 51_ Exhaust VVT-i 10_ 11_ BDC Operation Range 00SEG124Y " Performance Curve A 110 140 180 100 130 130 170 120 90 160 120 110 80 Torque 150 110 100 70 N.m (lb-ft) 140 90 100 130 80 60 Output 120 90 (HP) kW 70 50 110 80 60 100 50 40 40 30 30 20 20 10 10 0 1000 2000 3000 4000 5000 6000 7000 Engine Speed (rpm) 08SEG28Y ENGINE – 2ZR-FE ENGINE EG-5 JFEATURES OF 2ZR-FE ENGINE The 2ZR-FE engine has been able to achieve the following performance through the use of the items listed below. (1) High performance and fuel economy (2) Low noise and vibration (3) Lightweight and compact design (4) Good serviceability (5) Clean emission Item (1) (2) (3) (4) (5) A cylinder block made of aluminum alloy is used. f Spiny liners are used. f Engine Proper The skirt portion of the piston has a resin coating f f f applied to reduce friction. Low tension piston rings are used. f f A timing chain and a chain tensioner are used. f f VlValve Hydraulic lash adjusters are used. f f MechanismMechanism Roller rocker arms are used. f f f TOYOTA Genuine SLLC (Super Long Life Coolant) Cooling System f is used. A charcoal filter is used in the air cleaner cap. f An intake manifold made of plastic is used. f Intake and An upright intake port is used. f Exhaust System A stainless steel exhaust manifold is used. f f The TWCs (Three-Way Catalytic converters) are f used on the exhaust pipe. A fuel returnless system is used. f f f Fuel System Quick connectors are used to connect the fuel hose f with the fuel pipe. The DIS (Direct Ignition System) makes ignition f f f timing adjustment unnecessary. Ignition System Long-reach, thin-electrode type iridium tipped spark f f f plugs are used. Charging System A segment conductor type generator is used. f f Serpentine Belt A serpentine belt drive system is used. f f f Drive System MRE (Magnetic Resistance Element) type camshaft f position sensors are used. The ETCS-i (Electronic Throttle Control f Engine Control System-intelligent) is used. System The Dual VVT-i (Variable Valve Timing-intelligent) f f is used. The starter control (cranking hold function) is used. f EG-6 ENGINE – 2ZR-FE ENGINE JENGINE PROPER 1. Cylinder Head Cover D Lightweight and high-strength aluminum die-cast cylinder head cover is used. D An oil delivery pipe is installed inside the cylinder head cover. This ensures lubrication to the sliding parts of the roller rocker arm, improving reliability. Cylinder Head Cover Oil Delivery Pipe A View from A Cylinder Head Cover Gasket 04FEG50Y 2. Cylinder Head Gasket A triple-layer metal type cylinder head gasket is used. Front AA A – A Cross Section 008EG09Y ENGINE – 2ZR-FE ENGINE EG-7 3. Cylinder Head and Camshaft Housing D The cylinder head structure has been simplified by separating the camshaft housing (cam journal portion) from the cylinder head. D The cylinder head, which is made of aluminum, contains a pentroof type combustion chamber. The spark plug is located in the center of the combustion chamber in order to improve the engine’s anti-knocking performance. D The angle of the intake and exhaust valves is narrowed and set at 29_ to permit a compact cylinder head. D Spark plugs with an M12 thread size are used in order to increase the diameter of the intake and exhaust valves. As a result, improved intake and exhaust efficiency has been realized. D Upright intake ports are used to realize intake efficiency. D A taper squish combustion chamber is used to improve anti-knocking performance and intake efficiency. In addition, engine performance and fuel economy have been improved. D Long nozzle type fuel injectors are installed in the cylinder head to reduce the distance from the fuel injector to intake valve, thus it prevents the fuel from adhering to the intake port walls, and reduces HC exhaust emissions. D The siamese type intake port is used to reduce the overall surface area of the intake port walls. This prevents the fuel from adhering onto the intake port walls, thus reducing HC exhaust emissions. Camshaft Housing Intake A Valve Intake Side Intake Spark Side Plug Exhaust Hole Side Exhaust Side Upright Exhaust Intake Port Valve A Taper Squish View from Bottom Side A – A Cross Section 04FEG66Y 04FEG67Y — REFERENCE — Siamese Type Independent Type 215EG18 215EG19 EG-8 ENGINE – 2ZR-FE ENGINE 4. Cylinder Block D An aluminum cylinder block with a 7 mm (0.28 in.) distance between the cylinder bores is used to realize a compact and lightweight configuration. D An oil separator is provided in the blowby gas passage inside the cylinder block. This separates the engine oil from the blowby gas in order to reduce the degradation and consumption of volume of the engine oil. D It is not possible to bore the block with this liner. The liners are the spiny type, which have been manufactured so that their casting exterior form a large irregular surface in order to enhance the adhesion between the liners and the aluminum cylinder block. The enhanced adhesion helps heat dissipation, resulting in a lower overall temperature and reduced heat deformation of the cylinder bores. D Through the use of the offset crankshaft, the bore center is shifted 8 mm (0.31 in.) towards the intake, in relation to the crankshaft center. Thus, the side force to cylinder wall is reduced when the maximum pressure is applied, which contributes to fuel economy. Cylinder Block Liner Irregularly shaped outer casting surface of liner Oil Separator Oil Separator Cover 04FEG51Y Bore Center Maximum Maximum Pressure Pressure Crankshaft Center Crankshaft Center 04FEG52Y 082EG10Y Offset Crankshaft Center Crankshaft ENGINE – 2ZR-FE ENGINE EG-9 5. Piston D The piston is made of aluminum alloy to be compact and lightweight. D The piston head portion is a taper squish shape and accomplishes fuel combustion efficiency. D Full floating type piston pins are used. D The groove of the top ring is applied with hard anodizing treatment to ensure abrasion resistance. D Low-tension piston rings are used to reduce friction and achieve excellent fuel economy. D Narrow-width piston rings are used to reduce weight and friction. D A No. 1 compression ring with an inside bevel shape is used to reduce blowby gas. D A PVD (Physical Vapor Deposition) coating has been applied to the surface of the No. 1 compression ring and oil ring, in order to improve its wear resistance. D The piston skirt is coated with resin to reduce the friction loss. Taper Squish Shape PVD Coating Piston Ring No. 1 Compression Ring No. 2 Compression Ring Hard Anodizing Oil Ring Treatment Resin Coating PVD Coating 04FEG117Y 6. Connecting Rod and Connecting Rod Bearing D The connecting rods are made of high-strength steel weight reduction. D Plastic region tightening bolts are used for a light design. D The connecting rod bearings have been optimized in width to reduce friction. D The lining surface of the connecting rod bearing has been micro-grooved to realize an optimal amount of oil clearance. As a result, cold-engine cranking performance has been improved and engine vibrations have been reduced. Micro-grooved Connecting Rod Bearing 04FEG68Y 04FEG200Y Plastic Region Tightening Bolts EG-10 ENGINE – 2ZR-FE ENGINE 7. Crankshaft and Crankshaft Bearing D The crankshaft has 5 journals and 8 balance weights. D The crankshaft bearings have been optimized in width to reduce friction. D The pins and journals have been machined with increased precision and the surface roughness is minimized to reduce friction. D The lining surface of the crankshaft bearing has been micro-grooved to realize an optimal amount of oil clearance. As a result, cold-engine cranking performance has been improved and engine vibrations have been reduced. Oil Hole No.
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