ENGINE - 2AZ-FXE ENGINE
181EG10
VVT-i Controller
Intake Camshaft
Exhaust Camshaft
Chain Damper
Chain Slipper
Chain Tensioner
EG-12
VALVE MECHANISM
1. General
The 2AZ-FXE engine is a high-expansion ratio Atkinson cycle engine of which the intake valve close
timing has been significantly retarded by setting the VVT-i controller and intake camshaft to the retard
side.
Each cylinder is equipped with 2 intake valves and 2 exhaust valves. Intake and exhaust efficiency has been
increased due to the larger total port areas.
The valves are directly opened and closed by 2 camshafts.
The intake and exhaust camshafts are driven by a chain. The VVT-i system used for the intake camshaft
is used to increase fuel economy, engine performance and reduce exhaust emissions.
A shimless type valve lifter is used.