Sable car GAZ-2752, 2217, 2310>> Power supply system>> Design description

Design description

The power supply system consists of a fuel tank, топливопроводов, the fuel pump, the filter settler, the filter of thin purification of fuel, the K-151D carburetor with drives throttle and air a zaslonok, the air filter.

Fuel under the influence of the depression created by the fuel pump, passes through a grid of a toplivozabornik and on топливопроводу arrives in the filter settler case. Water and large mechanical particles remain in the case, and fuel passes through the filtering element consisting of a set of thin steel plates, and on the pipeline moves to the fuel pump. After the pump fuel passes through the filter of thin cleaning and arrives in the carburetor. The air necessary for formation of a working mix, arrives in the carburetor via the air filter.

The fuel tank is located on the left side under the car bottom. The tank fastens to a longeron by means of arms and collars. Between collars and a tank cardboard laying is laid.

On a van and the bus only the metal tank is established, on the car with an onboard platform the metal or plastic fuel tank can be established.

The refueling capacity of a metal tank makes 70 l, plastic — 60 l.

In the top part of a tank are a toplivozabornik consisting of a tube and the filter in the form of a brass grid, and also the sensor of the electric index of level of fuel. In the lower part of a tank the stopper of a drain opening is located. The stopper of a bulk mouth of a metal tank has the inlet and final valves similar to the steam-air valve of a plastic fuel tank.

The bulk mouth of a plastic fuel tank is fixed on the back panel of a cabin and connected to a tank a rubber hose. The carving stopper of a bulk pipe has no valves. When filling tank air forced out by fuel is taken away in the atmosphere via the steam-air valve connected to a tank by means of a polyvinylchloride tube and the union with the ball valve, preventing a fuel effluence from a tank when capsizing car in emergencies. The steam-air valve has inlet and final valves. The inlet valve works at depression in a tank of 0,44-3,53 kPas, final — at pressure of 0,39-1,62 kPas.

On a van and the bus the bulk mouth of a tank is located in a special niche. Outside the mouth is closed by the hatch.

Toplivoprovoda are executed from brass tubes. Tubes are connected to the fuel pump, a tank, the filter settler, the filter of thin purification of fuel and the carburetor by means of unions, conic couplings, cap nuts and flexible hoses with coupling collars.

Drain топливопровод takes away surpluses of fuel from the carburetor that improves work of a power supply system and start-up of the hot engine at high temperature of air.

The air filter — dry type, with a replaceable filtering element from a porous cardboard. The case of the filter is fixed on the carburetor, it is supplied with the airintaking goffered hose connected to a metal branch pipe, located on a front guard.

Between the case of the air filter and a flange of a cover of the carburetor rubber laying is established.

At temperature of air below 5 °C for giving in the carburetor of warmed-up air the airintaking hose is necessary for disconnecting from a branch pipe being on a guard of a front, and to connect to a branch pipe of the screen established on a final collector of the engine.

The drive of butterfly valves consists of a pedal, a cable connecting a pedal to sector of the lever of butterfly valves, tips with epiploons and adjusting nuts.

The drive of an air zaslonka consists of the handle located on the dashboard, and drafts in a cover. Before start-up of not heated-up engine an air zaslonka close, extending the handle on itself. When the handle is drowned, the air zaslonka is completely open.

Not to damage draft and a drive of an air zaslonka, before a pulling of the handle it is pressed against the stop and we hold pressed an accelerator pedal.

The fuel pump — diafragmenny type, is put in action via the intermediate lever by the clown fixed on distributive to a shaft of inlet valves. The fuel pump consists of the case with a cover, the block of diaphragms and the drive lever. In the top part of the case of the pump two are established delivery and one soaking up valves. They have not folding design: at failure at least one of valves the pump is subject to replacement assembled. Over the soaking-up valve of the pump the filter made of a small brass grid is established. For carburetor filling with fuel at the idle engine the pump has the lever of a manual drive. For prevention of hit of gasoline in a case at damage of diaphragms to the case of the pump there is an opening with the mesh filter.

The fuel filter settler is established on the left longeron of a frame before a fuel tank and intended for separation from fuel of water and mechanical impurity in the size more than 0,05 mm. For sediment plum in the bottom of the case of the filter there is a stopper. For purification of fuel of mechanical impurity the filter is supplied with the filtering element consisting of a set of thin metal plates.
The filter of thin purification of fuel is established on a bringing hose of the carburetor.

The system of a retsirkulyatsiya of the fulfilled gases (SROG) serves for decrease in emission of toxic substances with the fulfilled gases a way of giving of a part of the fulfilled gases from a final collector in the inlet pipeline.

Retsirkulyatsiya of the fulfilled gases is carried out on the engine, heated-up to temperature of cooling liquid 35–40 °C on partial loadings are not lower. Idling and at complete opening of butterfly valves of SROG does not work.

Management of work of SROG is carried out by depression from the first chamber of the carburetor, transferred on hoses via the thermovacuum switch established in a shirt of heating of the inlet pipeline, to the valve of a retsirkulyatsiya established on the inlet pipeline. Thus the part of the fulfilled gases brought on a tube from a final collector through the open valve of a retsirkulyatsiya, arrives in the inlet pipeline and further in engine cylinders.

In the absence of operating depression in a hose the retsirkulyatsiya valve under the influence of a spring is closed, and SROG does not work.

Car operation conducts with faulty SROG to unstable operation of the engine idling, to an excessive consumption of fuel and the increased emission of toxic substances.