FSI(缸内直喷分层燃烧引擎)direct injection stratified charge combustion engine cylinder)

FSI(缸内直喷分层燃烧引擎)direct injection stratified charge combustion engine cylinder

FSI is a new technology in the field of gasoline engine, fuel oil injection technique is similar to the diesel engine. It is equipped with according to the fuel supply system of control, and then through the pressure required to provide a piston pump, finally injector fuel in the most appropriate time and injected directly into the combustion chamber. Through the design of the combustion chamber shape, the spark plug will be around a thick mixture, while in other areas is a mixture of dilute, ensure the smooth ignition conditions in as much as possible to achieve lean combustion, which is the essence of stratified

combustion. FSI significantly improved than the engine power, fuel consumption is reduced about 15%.

FSI是汽油发动机领域的一项全新技术，有些类似于柴油发动机的高压供油技术。它配备了按需控制的燃油供给系统，然后通过一个活塞泵提供所需的压力，最后喷油嘴将燃料在最恰当的时间直接注入燃烧室。通过对燃烧室内部形状的设计，使火花塞周围会有较浓的混合气，而其他区域则是较稀的混合气，保证了在顺利点火的情况下尽可能地实现稀薄燃烧，这也是分层燃烧的精髓所在。FSI比同级引擎动力性显著提高，油耗却可

降低15%左右。

FSI engine, is the "engine", "direct injection gasoline engine".

It is the biggest optimized intake air mixing efficiency, make efficient oil saving and high power output is no longer the contradiction. Audi FSI increased the spark ignition engine torque and output, while increasing the economy of 15%, laid the foundation for reducing emissions. Compared with the conventional spark ignition engine, FSI injecting fuel directly into the combustion chamber, no longer need to throttle, reduce the heat loss of the engine, thereby increasing the output power and lower fuel consumption. Specific say:

FSI is Fuel Stratified Injection letter initials, meaning in Chinese is fuel stratified injection technology, it represents a developing direction in the future of engine. Fuel stratified injection technique is a kind of combustion technology of dilute engine. What is lean? As the name suggests is the content of gasoline engine in the mixture of gasoline and air is low, the ratio can reach more than 1:25.

V olkswagen's FSI engines use a high-pressure pump, the gasoline through a shunt rail (common rail) reached the high pressure solenoid controlled injection valve. It is characterized by variable swirl inlet has been produced in, make the intake air flow vortex is formed form the best into the combustion chamber, push the stratified filling mode to make the

mixed gas concentration in combustion chamber is located around central spark plug. If the mixing ratio of lean burn technology can reach more than 25:1, according to the conventional is not lit, so it is necessary to use by concentrated to dilute the stratified combustion mode. The rich mixture easy ignition formation around the spark plug by the in cylinder air motion, mixing ratio reaches about 12:1, the outer layer gradually thin. The rich mixture is ignited, combustion quickly spread to the outer layer.

FSI发动机，就是“缸内直喷发动机”，“直喷式汽油发动机”。它最大地优化了进气混合效率，使高效节油和大功率输出不再矛盾。奥迪FSI增加了火花塞点燃式发动机的扭

矩和输出，同时增加了15%的经济性，为降低排放奠定了基础。与常规的点燃式发动机相比，FSI可将燃油直接喷入燃烧室，不再需要节气门，降低了发动机的热损失，从而增大了输出功率并降低了燃油消耗。

具体的说：

FSI是Fuel Stratified Injection的字母简写，中文意思是燃料分层喷射技术，它代表着今后引擎的一个发展方向。燃油分层喷射技术是发动机稀燃技术的一种。什么叫稀燃？顾名思义就是发动机混合气中的汽油含量低，汽油与空气之比可达1：25以上。

大众FSI发动机利用一个高压泵，使汽油通过一个分流轨道（共轨）到达电磁控制的高压喷射气门。它的特点是在进气道中已经产生可变涡流，使进气流形成最佳的涡流形态进入燃烧室内，以分层填充的方式推动，使混合气体集中在位于燃烧室中央的火花塞周围。如果稀燃技术的混合比达到25：1以上，按照常规是无法点燃的，因此必须采用由浓至稀的分层燃烧方式。通过缸内空气的运动在火花塞周围形成易于点火的浓混合气，混合比达到12：1左右，外层逐渐稀薄。浓混合气点燃后，燃烧迅速波及外层。