What mode of operation does the car turbocharger use to reduce fuel consumption and weight？
What mode of operation does the car turbocharger use to reduce fuel consumption and weight？
In order to reduce fuel consumption in urban conditions, the car turbocharger uses two modes of operation of the internal combustion engine cycle, the Atkinson cycle with ultra-low fuel consumption during non-acceleration and the Otto cycle during acceleration. This is to significantly reduce fuel consumption while waiting at idle and on heavily congested roads. The Atkinson cycle, with half the volume of mixture of the Otto cycle, achieves full piston stroke work, which means that the Atkinson cycle is able to maintain the generator and compressor at idle with half the fuel, during idling and continuous driving, and the vehicle during continuous driving with half the fuel. When accelerating, the Alto cycle is used to bring out the engine's high output again.
In terms of engine weight, the European manufacturers have done more to reduce the weight of the 2.0T by simplifying the camshaft design of the cylinder head and making the camshaft integral with the valve cover. Every effort was made to make the engine lower, thus improving the handling of the front-wheel drive models and reducing understeer as much as possible. The front-wheel drive Audi A6 and A4 are examples of cars that handle better than other similar front-wheel drive models. The Toyota 8AR-FSE, on the other hand, is relatively complex and its weight is comparable to that of its V-6 engine. The reason for this is that the valve camshaft mechanism and cooling system are more complex than those of the Audi turbocharger, the lubrication of the camshaft mechanism, the distribution of the shingles is more dense, and the turbocharger parts are made more robust and durable. ....
All of this adds to the overall weight of the engine. But because the Crown uses a rear-wheel-drive architecture, this weight is easily dispersed by the weight of the transmission, differential, etc., shifting the overall centre of gravity back and achieving the ideal front-to-rear mass ratio.
