power supply system injection engine or, quite simply, injection - fuel supply system, which is used for engines running on gasoline, and has advantages over the carburetor.
injection engine produces an easy start the vehicle, regardless of any weather conditions.Such a system is able to adjust itself during operation, flexibly shifting the parameters of cooking, air-fuel mixture, based on the sensor readings, information from which is fed to an electronic control unit (ECU).
Today, fuel-injected engine is almost completely eliminate the use of outdated carburetor system.With his appearance significantly improved dynamics of dispersal, reduced the amount of harmful substances emitted into the atmosphere, reduce the cost of motor fuel.It instantly responds to even minimal changes in load.
injection systems are classified according to the position and number of nozzles.Currently, the most popular such, having the unit injector engine with distributed injection of fuel, which provides for an individual nozzle for each cylinder.All the jets are connected to the ramp, where the fuel is pressurized.It creates an electric fuel pump.The amount of fuel injected into the system depends on the opening time of the injector.
What time it is opened, the computer adjusts the (controller).Apparatus injection engine such that, based on the result of processing the readings from the various sensors, the ECU starts engine Injection.Mass air flow sensor is used for the calculation of the cycle of filling cylinders.The volume of air is measured consumable, then there is recalculated electronic control unit in the cylinder filling cycles.Engine power is increased up to 10% due to the improvement of the filling cylinder, optimum spark advance which corresponds to the engine running.In case of breakage of the sensor is carried out according to certain calculation tables.
throttle valve position sensor is used to calculate the load on the engine.In case of change of the engine, filling the cylinder cycles of the angle of rotation of the throttle valve.
temperature sensor for the coolant used to determine the correct fuel supply for thermal parameters and to control the electric fan.If it is damaged readings are not taken into account, the parameters, depending how much time the engine is running, the alarm is taken from the table.
For the system to work in sync, to determine the engine speed, crankshaft position at certain moments, applied polar sensor that detects the position of the crankshaft.When you turn the wrong injection engine simply will not start.If the sensor fails, the system will not operate.It's very important, and if the damage other controllers will be able to ride the machine, then without the car will not start.
The injection system has a feedback - into the exhaust system just before the catalyst, oxygen sensor is installed in the exhaust gases of the vehicle (it is also called lambda probe).That information, which it has issued, the system is used to adjust the desired amount of fuel supplied to the injector system, accurately maintaining the required parameters of the working mixture, therefore, fuel consumption becomes more economical, while the level of emissions reduced.
Here are the main required for injection system sensors.Injection engine supply system, depending on whether the engine is installed on your car can be equipped with different controllers.
