10.3.1.4. Power supply system


Fig. 10-17. Unit of the central injection: 1 — the fuel pressure regulator; 2 — a nozzle; 3 — the fuel supply union; 4 — the sensor of provision of a butterfly valve; 5 — the union of removal of fuel in a tank; 6 — an adsorber purge branch pipe; 7 — a branch pipe of ventilation of a case of the engine; 8 — a branch pipe for connection of the sensor of absolute pressure; 9 — the idling regulator; 10 — the sector of the drive of a butterfly valve from a pedal in interior of the car

The unit of the central injection of fuel (fig. 10-17) is installed on an inlet pipe instead of the carburetor and consists of the fuel feeding case (the top part of the unit) and the case of a butterfly valve (the lower part of the unit). In the case of fuel feeding there is a nozzle 2 for injection of fuel and the regulator of 1 pressure of fuel. In the case of a butterfly valve the idling regulator 9, a butterfly valve and the sensor 4 provisions of a butterfly valve are located. For selection of depression there are three branch pipes 6, 7 and 8 connected to zadrosselny space.

Fig. 10-18. Scheme of operation of the regulator of pressure of fuel: 1 — pressure regulator diaphragm; 2 — a spring; 3 — pressure regulator valve; 4 — a nozzle; And — the channel of a supply of fuel; In — the channel of discharge of fuel

The regulator of pressure of fuel supports pressure of the fuel moving to a nozzle at the constant level within 190–210 kPa. It consists of the valve 3 (fig. 10-18) with a diaphragm 1 which is drawn in by a calibrated spring to a saddle in the case of fuel feeding of the unit.
When pressure of fuel becomes above norm, it overcomes effort of a spring, the valve opens, excess fuel on channel "B" and the drain highway merges in the fuel tank and pressure of fuel decreases. At pressure drop below norm the valve a spring nestles on a saddle and the discharge of fuel stops.

Fig. 10-19. Scheme of operation of the regulator of idling: 1 — the fuel feeding case; 2 — the idling regulator valve; 3 — a butterfly valve; 4 — the channel of idling; 5 — the idling regulator

The regulator of idling of 5 (fig. 10-19) regulates the frequency of rotation of a bent shaft on the idling mode, operating amount of the given air bypassing the closed butterfly valve on channel 4. It consists of the bipolar step electric motor and the conical valve 2 connected to it. The valve moves forward or cleans up the step electric motor, on EBU signals.
When the needle of the regulator is put completely forward (that there correspond 0 steps), the valve completely blocks air pass. When the needle is moved, the air consumption proportional to quantity of steps of withdrawal of a needle from a saddle is provided.
The nozzle 4 (see fig. 10-18) represents the electromagnetic valve. When on it from EBU tension impulse arrives, the valve opens and fuel through a spray under pressure is injected by thinly sprayed stream into the mixing camera over a butterfly valve. After interruption in supply of an electric impulse the sprung valve blocks fuel supply.

Fig. 10-28. Scheme of electric connections of system of injection: 1 — the engine cooling system fan electric motor: 2 — the assembly block; 3 — the idling regulator; 4 — an electronic control unit; 5 — an octane potentiometer; 6 — spark plugs; 7 — the ignition module; 8 — the sensor of provision of a bent shaft; 9 — an electrogasoline pump with the fuel level sensor; 10 — a tachometer; 11 — a control lamp of "CHECK ENGINE"; 12 — the car ignition relay; 13 — the speed sensor; 14 — diagnostics block; 15 — a nozzle; 16 — the adsorber purge valve; 17, 18, 19 — safety locks of system of injection; 20 — the relay of ignition of system of injection; 21 — the relay of inclusion of an electrogasoline pump; 22 — the relay of an electric heater of an inlet pipe; 23 — an electric heater of an inlet pipe; 24 — a safety lock of a heater of an inlet pipe; 25 — the sensor of concentration of oxygen; 26 — the sensor of temperature of cooling liquid; 27 — the sensor of provision of a butterfly valve; 28 — the air temperature sensor; 29 — the sensor of absolute pressure; And — to the plus plug of the rechargeable battery; In — to the ignition switch 15 plug; P4 — the relay of turning on of the electric motor of the fan

The electrogasoline pump — two-level, rotor type, non-demountable is established in the fuel tank. It provides supply of fuel under pressure of more than 284 kPa. The electrogasoline pump joins by means of the auxiliary relay 21 (see fig. 10-28).
The electrogasoline pump is located directly in the fuel tank that reduces a possibility of formation of steam traffic jams since fuel moves under pressure, but not under the influence of depression.
The fuel filter is built in the giving highway between an electrogasoline pump and the unit of the central injection of fuel, and installed in a motor compartment on the left mudguard. The filter — non-demountable, has the steel case with the paper filtering element.
The electric heater of an inlet pipe is established in the lower part of an inlet pipe, directly under the unit of the central injection of fuel. It serves for the accelerated warming up of system of an admission of the cold engine. It provides bystry evaporation of fuel and its uniform distribution on cylinders. As a result riding qualities with the cold engine improve and toxicity of the fulfilled gases decreases.
EBU includes an electric heater by means of the auxiliary relay 22 (see fig. 10-28) when performing all following conditions: temperature of cooling liquid is below 65 °C, air temperature on an admission is below 80 °C also supply voltage more than 8 Century. These conditions take place on not heated-up working engine with the minimum electric loading from auxiliary units.
EBU switches off an electric heater when performing one of the following conditions: temperature of cooling liquid is higher or is equal to 65 °C, air temperature on an admission is more than 80 °C also supply voltage less than 6 Century. These conditions take place on the heated-up engine and/or at high electric loading from auxiliary units.