nozzle mounted in the combustion chamber, gasoline direct injection combustion chamber in the cylinder, the air enters the combustion chamber mixed with gasoline through an intake valve, and then ignited work.
1. The practical application of injection
injection technology is widely used in the VAG group, and R8 AudiRS4 shared by a 4.2-liter FSI engine that is one representative powerful performance.
which can be regarded as an example of the Volkswagen Group imported the most representative direct injection technology, now includes Audi and VW have been named FSI (the Audi brand) or TSI (VW, Skoda brand) direct injection engine as a high-order power source of its cars, but also in Audi and VW cars top car, and even more in order to combine FSI turbocharged to increase the power.
2. Advantages of injection
advantages of the
in-cylinder direct injection gasoline engine is low fuel consumption, high power rise.
air-fuel ratio to reach 40: 1 (air-fuel ratio of gasoline engine is 15: 1), which is known as “the lean.”
in the top of the piston machine is half spherical and the other half wall, the air is rushed from the valve form one swirling motion of the piston under compression, when the end of the compression stroke is about to start at the top of the combustion nozzle injection, gasoline and air to form a swirling motion under the action of a mixed gas, a mixed gas of such a rapidly rotating is hierarchical, more concentrated closer to the spark plug, ignition is easy to do work.
a compression ratio up to 12, compared with the general engine of the same displacement power and torque are increased by 10%.