General information about 1AZ-FE and 2AZ-FE engines The 1AZ-FE in-line, four-cylinder, 2.0-liter displacement, with two overhead camshafts in the cylinder head and 16 valves, was developed on the basis of the 1AZ-FE engine of the modern RAV4 model. The 2AZ-FE, in-line,...
Distinctive features of the engines of the 1AZ-FE and 2AZ-FE models The characteristics of the 1AZ-FE and 2AZ-FE engines listed below are ensured by using the elements and systems indicated in the table. High efficiency and fuel efficiency. Low noise and vibration. Light weight and...
Cylinder head cover Pic. 2.4. Cylinder head cover and gasket: 1 – a cover of a head of the block of cylinders; 2 - integrated gasket for spark plugs; 3 – a lining of a cover of a head of the block of cylinders cylinder head cover (pic....
Cylinder head gasket Pic. 2.5. Cylinder Head Gasket: 1 - FIPG coating Cylinder head gasket (pic. 2.5) steel, multilayer, with a special coating.
Cylinder head — design description Pic. 2.6. Cross section and top view of the cylinder head: 1 - fuel injector; 2 - bypass channel; 3 - cone displacer The wedge-shaped combustion chamber is used to provide high knock resistance and fuel efficiency of...
Cylinder block — design description Pic. 2.7. Cylinder block and air flow pattern during rotation of the engine crankshaft: 1 - chamber of the coolant pump; 2 - thermostat housing; 3 - crankcase; 4 - oil filter bracket; 5 – an arm of the compressor of the... There is 1 comment
Piston — design description Pic. 2.8. Piston and piston skirt The piston is made of aluminum alloy, and the skirt area is made compact and lightweight. The piston crown portion is wedge-shaped to improve fuel efficiency. The piston skirt is coated...
Connecting rod — design description Pic. 2.9. Connecting rod: 1 - connecting rod bolts with tightening torque in the plastic zone connecting rods (pic. 2.9) and their covers are made from high strength steel to reduce weight. To facilitate the design,...
Crankshaft — design description Pic. 2.10. Crankshaft: 1 – a gear wheel of a drive of a balancing shaft; 2 - oil channel; 3 - counterweight Crankshaft (see fig. 2.10) has 5 necks and 8 counterweights. Crankshaft bearings reduced in width to reduce...
Balance shaft — design description Pic. 2.11. Balance shaft: 1 - crankshaft; 2 - drive; 3 – balancing shaft 2; 4 – balancing shaft 1; 5 - balancing shaft housing The balance shaft is used to reduce vibrations. The balancing shaft is driven by a gear,...
Engine accessory drive system General information Pic. 2.36. Auxiliary equipment drive: 1 - crankshaft pulley; 2 – a pulley of the pump of the amplifier of a steering; 3 - tension pulley of the automatic tension mechanism; 4 - alternator pulley; 5 -...
Valve drive mechanism Pic. 2.12. Scheme of the valve drive mechanism: 1 – VVT-i regulator; 2 – a cam-shaft of a drive of inlet valves; 3 – a cam-shaft of a drive of final valves; 4 - exhaust valves; 5 - inlet valves; 6 - chain damper; 7 -...
Valve drive camshaft Pic. 2.13. Valve drive camshaft: 1 – VVT-i regulator; 2 – a cam-shaft of a drive of inlet valves; 3 – synchronization rotor; 4 – a cam-shaft of a drive of final valves; 5 - camshaft drive sprocket The intake camshaft...
Inlet and outlet valves Inlet and outlet valves with a larger valve face are used to improve the gas flow at the inlet and outlet. Reduced diameter valve stems are used to reduce inlet and outlet flow resistance and to reduce valve weight....
Gas distribution mechanism drive chain Pic. 2.15. Timing mechanism drive chain: 1 - chain guide shoe; 2 - chain tensioner; 3 - chain damper; 4 - oil spray nozzle A roller chain with a pitch of 8 mm is used. The timing chain is lubricated by an oil spray...
Lubrication system — general description The lubrication system works under pressure, the oil passes through the oil filter. The oil pump with trochoidal gears is driven by a chain from the crankshaft. The oil filter is located on the bottom of the crankcase...
Oil pump — design description Pic. 2.18. Oil pump: 1 - crankshaft; 2 - safety shaft; 3 - oil pump The oil pump with trochoidal gears is driven by a chain from the crankshaft and is compactly located under the timing chain cover. Friction is reduced...
Cooling system — general description Pic. 2.19. Scheme of the 2AZ-FE engine cooling system: 1 – oil cooler with water cooling; 2 - coolant pump; 3 - throttle branch pipe; 4 - bypass channel; 5 - thermostat; 6 - drain cock The cooling system is closed with...
Intake and Exhaust System — General Description Pic. 2.21. Camry intake and exhaust system: 1 - three-component catalytic converter; 2 - exhaust manifold; 3 - intake manifold; 4 - main muffler; 5 - three-way catalytic converter; 6 - air filter Two resonators, side...
Air filter — design description Pic. 2.22. Camry intake and exhaust system: 1 - resonator; 2 - mass air flow sensor; 3 - PET material (polyethylene terephthalate); 4 - resonator; 5 - inlet pipe of the air filter; 6 - side outlet Flameless, fabric air...
Throttle assembly — design description Pic. 2.23. Throttle assembly: 1 - throttle actuator motor; 2 - throttle valve; 3 - throttle return spring; 4 - throttle position sensor The use of ETCS-i without mechanical linkage provided excellent throttle control. A...
Intake Manifold — Design Description Pic. 2.24. Intake manifold: 1 - intake manifold cover The intake manifold is made of plastic to reduce weight and reduce heat transfer from the cylinder head. As a result, it is possible to reduce the intake air...
Exhaust manifold — design description Pic. 2.25. An exhaust manifold: 1 - air-fuel ratio sensor; 2 - three-way catalytic converter; 3 - cross section of a three-way catalytic converter A stainless steel exhaust manifold is used to reduce weight. A...
Exhaust pipe — design description Pic. 2.26. Exhaust pipe: 1 - cross section of a three-way catalytic converter; 2 – main muffler; 3 – additional muffler; 4 - three-way catalytic converter A thin-walled, high-cell ceramic three-way catalytic converter...
Two stage exhaust control system A two-stage release control system is used. This system reduces the back pressure when opening and closing the adjustable valve, which is located in the main muffler, thus changing the pressure of the exhaust gases. The...
Fuel system — general description Pic. 2.28. Fuel system of a Camry car: 1 - fuel injector; 2 – pulsation damper; 3 - fuel pump; 4 - fuel tank The fuel system without fuel return to the tank is used to reduce the emission of fuel vapors. A compact fuel...
Fuel Injector — Design Description Pic. 2.30. Fuel burner A compact fuel injector is used (pic. 2.30) with 12 holes with a high degree of fuel atomization.
Fuel pump — design description Pic. 2.31. Fuel pump components: 1 - fuel pressure regulator; 2 – fuel level sensor; 3 - fuel pump filter; 4 - fuel pump; 5 - strainer Compact fuel pump is used (see fig. 2.31), in which the fuel filter, pressure...
Ignition system — general description General information Pic. 2.32. Scheme of the ignition system DIS system applied (direct ignition system). DIS improves ignition timing accuracy, reduces high voltage losses, and improves overall ignition system...
Starter — design description Compact and lightweight PS starter (planetary gear motor) applies to all models. Since the PS starter has a square conductor armature, its surface is used as a collector, which increases the starter torque and reduces...