The New Prius Uses an Improved Hybrid System and New Engine
Jul 8, 2009 By Toyota Australia.
A 1.8-litre four-cylinder petrol engine replaces the 1.5-litre engine on the previous model.
The bigger engine produces more power - 73kW, up from 56kW - and more torque - 142Nm, up from 110Nm.
This helps trim the 0-100km/h time from 10.8 to 10.4 seconds.
The petrol engine has no belts - a first for Toyota. Power steering and the water pump are electrically operated, which improves fuel economy because drag on the crankshaft is reduced.
A new exhaust-gas recirculation system provides quicker warm-up time for the engine and also for the cabin-heating system.
Toyota's patented Hybrid Synergy Drive system is 90 per cent newly developed with significant improvements over previous models.
A new 60kW electric motor works in tandem with the petrol engine to improve acceleration.
The new hybrid transaxle is smaller, lighter and capable of handling a higher torque load. A gear drive replaces the previous chain drive.
The electric motor runs as high as 13,500rpm, resulting in less reliance on the engine.
The inverter, which converts direct current to alternating current, has a new direct cooling system to reduce size and weight.
Using proven and reliable nickel-metal hydride technology, the Hybrid Synergy Drive battery output has been increased through improved cooling.
Find out more about Toyota's latest Hybrid Car for Australia