ENGINE — 2UZ-FE ENGINE 32 FEATURES OF 2UZ-FE ENGINE Features of the 2UZ-FE engine are listed below. System Features Engine Proper An upright intake port has been adopted to improve the intake efficiency. A taper squish configuration has been adopted to improve the combustion efficiency. A steel laminate type cylinder head gasket has been adopted to improve its reliability. An aluminum oil pan that is integrated with stiffeners has been adopted to reduce noise and vibration. The skirt portion of the piston has been changed in shape and applied with resin coating to reduce friction. Valve Mechanism Inner shim type valve lifters have been adopted.
Large-diameter intake and exhaust valves have been adopted to reduce the intake and exhaust resistance. Intake and Exhaust System A long port intake manifold is used to improve the engine’s torque in the low-to mid speed range. A 2-way exhaust control system has been adopted to improve engine per- formance and to ensure an even quieter operation. Fuel System 4-hole type fuel injectors have been adopted to improve the atomization of fuel. A quick connector is used to connect the fuel filter and the fuel hose togeth- er to improve serviceability.
A fuel pump inertia switch, which stops the fuel pump if an extremely strong impact such as that of a collision is detected, has been adopted to realize excellent safety performance. Ignition System The DIS (Direct Ignition System) is used to enhance the reliability of the ignition system. Iridium-tipped spark plugs have been adopted to improve ignition. Engine Control System ETCS-i has been adopted to realize excellent controllability and comfort of the vehicle. The cruise control system and the engine immobiliser system have been integrated with the ECM.