The New Toyota Auris Engine With Toyota Optimal Drive and Stop&Start Technology | Part Three

The Toyota Auris is the first model in Europe to benefit from Toyota Stop&Start technology. When the car is stationary, with the transmission in neutral and the driver's foot off the clutch pedal, the engine automatically and quietly stops to reduce fuel consumption and emissions. When the driver re-engages the clutch, the engine automatically restarts. This brings particular benefits in urban traffic, with a potential 15 per cent improvement in the amount of fuel used and CO2 emissions.

Stop&Start is very quiet, smooth and refined in its operation. In a world-first design, the system has a permanently engaged starter gear mechanism: the starter motor is in direct contact with the ring gear on the engine, which means the engine stops and starts quickly and quietly. Compared to the 1.4 VVT-i, the start-up noise level has been reduced by 9dB and starting time cut from 0.7 to 0.4 seconds.

The engine is matched to newly developed six-speed manual transmission, with ratios calculated to deliver the best possible balance of performance and fuel economy. The twin-shaft unit is 11 per cent smaller and has 15 per cent fewer components than the five-speed unit, but has a higher torque capacity. Friction is reduced and the driver enjoys an improved gear shift feel. Using an extra gear compared to the transmission used in the previous Toyota Auris 1.4 VVT-i, it also gives more refinement at high speed.

Published 19 November 2008 Staff

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