September 24, 2014

the exhaust manifold integrated into the cylinder head has a separate water circulation by heat exchange



Changes in one: the first time the collection manifold fuel injection (MPI) and fuel injection (FSI) of dual injection system fuel injection system is a major change in the new EA888 engine, based on the original top-cylinder direct injection technology,Universal Turbo adding the more conventional manifold injection, so that the whole fuel injection system to form a combination of direct injection and manifold injection through both their strengths in order to better meet the needs of different conditions of fuel injection. In fact, the mix is nothing new injection technology, Toyota's D-4S fuel injection technology has already achieved mixed production and application. The benefits of fuel mixture injection manifold advantages of both injection and direct injection rather make up their lists. By fog and haze is a serious tier cities in China, let alone direct injection exhaust produces more respirable particulate matter (PM10 / 2.5) is not conducive to domestic air improvement.

Second variation: the exhaust manifold integrated into the cylinder head has a separate water circulation by heat exchange, the third generation EA888 Another great change of the engine to the exhaust manifold is placed directly within the cylinder head, aimed at reducing the a turbocharger intake air temperature and pressure, thereby reducing the load of the turbine, to increase the life of the turbine. Also, since prior to entering the turbine to cool the intake air temperature is equivalent to increase the limit of the turbine, allows a higher exhaust gas temperature of the engine, which means that the engine output may be adjusted higher power and torque. Renault Turbo But because this part of the operating temperature of the exhaust manifold it is more astonishing, but also more complex structures, parts of the engine cylinder head for stability also presented a huge challenge. In this regard, the cooling system in the cylinder head has been improved, a higher flow rate to ensure that the cooling efficiency (otherwise this part of the coolant even dangerous boiling).

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