HYBRID ENGINE
The gas/petrol engine
used in Toyota Hybrid technology is more energy-efficient, producing
higher output than conventional gas/petrol engines.
The new (2009) Prius'
1.8L 2ZR-FXE high-expansion-ratio Atkinson cycle engine replaces the former
1.5L 1NZ-FXE. The wealth of torque created by an increased displacement
decreases the engine rpm during high-speed CRUISING. Further improvements
in fuel efficiency have been achieved through the following new mechanisms.
Electric Water Pump
Exhaust heat
recirculation system
This system utilizes exhaust heat -what used to go wasted- for the heater and
to warm up the engine, allowing quicker heater and engine warm ups.
Cool-EGR system
Flow volume of the exhaust gas is controlled carefully by the electric EGR
valve and is channeled into the intake manifold, alleviating negative pressure
in the manifold and decreasing pumping loss in the engine. Cooling the exhaust
gas with the EGR cooler actualizes large volume EGR.
Roller rocker arm
The valve train system features roller rocker arms, decreasing friction loss in
valve movements.
Hybrid Engine
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