Among reciprocating internal combustion engines, the gasoline engine is currently the most common. In the gasoline engine, the ignition of the fuel-air mixture is forced by an electric spark. Its serious breakdown is a reason to use the service scrapy car removal in mississauga.
The main directions of improvement of gasoline engines are:
reduction of fuel
decrease of exhaust gases toxicity;
increasing engine power.
The direct inject
ion system injects fuel directly into the combustion chamber. Depending on the engine operating mode, t
he amount of injected fuel, injection timing and different types of fuel-air mixture (stratified, homogeneous, stoichiometric homogeneous) are regulated.
The modern intake system is characterized by an electrically actuated throttle and intake flaps per cylinder. Intake flaps divide the air flow into two channels – free and shutoff flaps. Closed intake flaps provide layer-by-layer mixture formation due to vortex air movement in the combustion chamber.
Turbocharging is a fairly effective system for increasing the power of a gasoline engine, based on compression of the intake air with the energy of the exhaust gases. However, the use of turbocharging in gasoline engines is limited by the possibility of detonation.
The variable valve timing system ensures the effective operation of
the timing mechanism in different engine operating modes (idle, low rpm, high rpm). In various designs of the systems, the effect is achieved by changing the opening (closing) moment of the valves, the duration of their opening, as well as the height of lift.
The most advanced system of ignition of the fuel-air mixture of a gasoline engine is the electronic ignition system, in which the creation and distribution of high voltage current to the engine cylinders is performed by electronic components – sensors and control unit.
The exhaust system, in addition to releasing the exhaust gases, also reduces their toxicity to a large extent. This function in the system is performed by a catalytic converter, which operates under the control of an oxygen sensor – lambda probe.
An exhaust gas recirculation system contributes to reducing the toxicity of the exhaust gases. The system reduces the nitrogen oxide content in the exhaust gases by returning part of them to the intake manifold.
The engine management system integrates the operation of all these systems to ensure their optimum performance in all engine operating modes.