6. Power supply system and releaseThe power supply system consists of the fuel tank placed in it the electric fuel pump, the main EFI relay, injectors of injection, the regulator of pressure of fuel, assembly of the air cleaner and the case of a throttle. All models are equipped with electronic system of the distributed injection of fuel (MPI).
System of the distributed injection of fuel (MPI)
In the considered system for management of injection of fuel through injectors directly to the inlet port of each of combustion chambers of the engine electric impulses of accurately limited duration are used. The moment and duration of time of opening of each of injectors controls the electronic module of management (ESM) of system. ESM continuously traces working parameters of the engine and on the basis of the analysis of the arriving information determines the required volume of the fuel injected into each of inlet ports. In parallel ESM exercises also control of installations of turns of idling and a corner of an advancing of ignition. The case of a throttle serves only for management of giving in an air power supply system. In view of the fact that each of cylinders is equipped own, located in close proximity to the inlet valve, an injector, this scheme provides a possibility of very exact management of composition of air-fuel mix.
Fuel arrives to injectors under a constant pressure which size exceeds pressure in the inlet pipeline. The regulator of pressure of fuel supports continuous difference of pressure between the entrance and output section of each of injection injectors. The regulator is equipped with the locking valve, a sensitive element of membrane type and the loaded spring. Control of pressure difference is exercised of a fuel drosselirovaniye in a gap between the locking valve and its saddle. Excess fuel on the returnable line is taken away back in the fuel tank.
As fuel moves on each of injectors with a constant pressure, the amount of the fuel injected into the engine is defined only by duration of opening of an injector which control is exercised by ECM. The same module watches compliance of phases of gas distribution and ignition.
The damper of pulsations of pressure of fuel (if that is provided) serves for elimination of the wave formation arising in fuel pipes at the moments of opening and closing of injectors of injection. The damper is equipped with the air and fuel cameras divided by a membrane which actually and makes clearing of elastic fluctuations in a fuel stream.
The amount of the air given to the engine is defined by the provision of a butterfly valve and frequency of rotation of a bent shaft. The sensor of measurement of a stream of air installed in the inlet highway delivers to the module of management information on the basis of which ESM determines the required duration of opening of injectors.
If the return is not stipulated by character of the carried-out task before starting service of components of a power supply system without fail disconnect a negative wire from the battery. Always you keep in readiness the class B fire extinguisher.
Before removal of components (injectors, the fuel highway, pressure regulator) / a detachment of lines of a fuel path do not forget to dump pressure in a power supply system. Try not to allow hits of fuel on open parts of the body. The nipple socket which is subject to a rassoyedineniye should be wound with rags in order to avoid spraying of the fuel staying under residual pressure. At once collect the spilled fuel by paper towels which sufficient stock always has to be near at hand.
Fuel pump and fuel pipes
Supply of fuel from a gasoline tank in system of injection and return of its surplus back in a gasoline tank is carried out on two metal lines laid under the car bottom. The submersible electric fuel pump of rotor type is located in a gasoline tank and is united in uniform assembly with fuel consumption sensor block. At the exit of a gasoline pump the fuel filter providing a filtration of particles up to 20 ÷ in size of 30 microns is provided.
The system of return of fuel evaporations carries out removal of vapors of fuel back in a gasoline tank on the separate returnable line.
The fuel pump continues to function during all operating time of the engine, i.e. while ESM receives basic impulses from electronic system of ignition (see the Head Elektrooborudovaniye of the engine). 2 ÷ 3 seconds later after interruption in supply of basic impulses the pump stops.
At an otpuskaniye of nipple sockets use two wrenches what to allow to avoid undesirable and dangerous deformations of fuel lines. Strictly you monitor observance of standard requirements to efforts of tightening of sockets. Remember that sealing rings of nipple connections when joining the last are subject to replacement without fail.
System of production of the fulfilled gases
The system of production of the fulfilled gases consists of the final collector(s) equipped with the oxygen sensor, a reception pipe, the catalytic converter, and the muffler.
The catalytic converter is the main component of system of decrease in toxicity of the fulfilled gases. The monoblock converter can be used in combination with three-functional reducing (for more details see in the Head of the Control system of the engine).