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New Toyota engines

15.04.2014

Toyota has introduced new 1,0 and 1,3 liter displacement petrol engines, featuring improved performance and low fuel consumption.

Power plants operate on the Atkinson cycle. In such units, the working stroke (3rd stroke of the Otto cycle) is increased due to the complication of the crank mechanism. The Atkinson cycle provides good environmental performance and economy, but requires high RPM. At low speeds, the engine produces a relatively small torque and may stall.

Computer controlled Atkinson cycle powertrains are used in the Toyota Prius, Lexus GS 450h and Lexus CT 200h hybrid vehicles. New installations are designed for independent use, without an additional electric motor.

The 1,0 liter unit has a compression ratio of 11,5:1. This three-cylinder unit produces 68 horsepower and 95 Nm of torque. Claimed fuel consumption is only 3,9 liters per 100 kilometers. The thermal efficiency is 37%.

The 1,3-liter four-cylinder engine has a compression ratio of 13,5:1. The thermal efficiency is 38%.

A number of innovative technologies are used in power plants. These are, in particular, the Variable Valve Timing intelligent Electric (VVT-iE) variable valve timing system, the Exhaust Gas Recirculation (EGR) cooled exhaust gas recirculation system, a specially designed inlet channel, etc.

By 2015, Toyota intends to release 14 modifications of power plants based on the new 1,0- and 1,3-liter engines.

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