Toyota Land Cruiser 100/Amazon, Lexus LX 470

since 1997 release

Repair and operation of the car

Power supply system and production of the fulfilled gases

General information

System of electronic injection of fuel (EFI)

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 various 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 installation of 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.

The regulator of pressure of fuel supports continuous difference of pressure between the entrance and output section of each of injectors. The nominal rate of working pressure makes 2.9 kgfs/cm ². 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.

The damper of pulsations of pressure of fuel serves for elimination of the wave formation arising in fuel pipes at the moments of opening and closing of injectors. 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.

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 - 30 microns in size 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.

System of production of the fulfilled gases

The system of production of the fulfilled gases consists of the reception pipes equipped with the oxygen sensor, catalytic converters, 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 and decrease in toxicity of the fulfilled gases).