Opel Kadett E

1984-1991 of release

Repair and car operation

6.2.5.2.1. Early models (the engine 18)

THE GENERAL DATA

On early models 1,8 with the engine 18 Е the system of injection of fuel Bosch LE-Jetronic was established.

At the expense of electronic control by system of injection of fuel exact dispensing of fuel for effective work of the engine with a minimum level of emission of harmful substances in atmosphere is provided. It is reached by the constant control of work of the engine various gauges which hand over the information in the form of electric signals to the management block (ECU). On the basis of this data the management block defines quantity of fuel which is necessary for submitting to the engine on all operational modes and engine turns. Fuel injection is made directly in an inlet collector.

On the basis of the information from gauges the management block regulates time and quantity of injected fuel. The quantity of injected fuel is proportional to duration of an open condition of a fuel atomizer to which for a certain time depending on an operating mode the electric signal is given. As a result of pressure giving on a winding of an electromagnet the anchor of a fuel atomizer is involved, the needle valve rises, thereby opening an injection aperture, and fuel moves in an inlet collector about the inlet valve.

The management relay contains an electronic element of an advancing and the relay switch which blocks giving of fuel after an engine stop.

The gauge of a stream of air measures quantity of air arriving at present of time in the engine. In the case of a measuring instrument of a stream of air is заслонка which at passage of an air stream deviates. The deviation corner заслонки serves as a measure of a stream of air. From a potentiometer on an axis заслонки in the management block the signals corresponding to position заслонки arrive. The management block regulates time and quantity of injected fuel according to the measured quantity of air and number of turns of the engine. The the atomizer is longer open, the more fuel is injected.

Fuel atomizers represent electromagnetic operated valves which open on signals of the block of management. Fuel atomizers receive only one impulse opening them simultaneously once for one turn of a cranked shaft. Block ECU operates a fuel atomizer, changing width of an impulse, that is an interval of time, when the atomizer is opened to provide richer or poorer fuel mix. The fuel pump – electric with the circulating chamber, is placed in a back part of the car. The fuel pump submits fuel to a fuel highway which also carries out functions of the tank for fuel atomizers. The quantity of the fuel submitted the pump, considerably exceeds quantity of the fuel consumed by the engine therefore constant circulation of fuel in system is carried out. It allows to maintain temperature some fuel on a low level and reduces probability of formation of stoppers of steam in fuel system therefore start of the hot engine improves.

The regulator of pressure of the fuel, located in a fuel highway, supports pressure of fuel in fuel system at certain level. The regulator of pressure of fuel consists of a metal casing in which the diaphragm dividing a casing on two chambers is established. In one chamber of a regulator fuel arrives, and in another depression from an inlet collector moves. On a diaphragm the valve is rigidly fixed, at a diaphragm deviation the channel on which fuel comes back in a fuel tank opens. As a result of it at depression increase in an inlet collector pressure of fuel in fuel system proportionally decreases.

The gauge of position throttle заслонки is connected to an axis throttle заслонки. The gauge defines position throttle заслонки.

The information from the gauge of position throttle заслонки is used for reduction of giving of fuel at braking by the engine therefore fuel is saved and the maintenance of harmful substances in exhaust gases decreases.

The additional air valve represents the air channel of the big section which is connected by hoses to the case of a throttle and an inlet collector. The valve passes additional quantity of air in the engine, passing throttle заслонку.

On the valve is available заслонка, connected to a bimetallic spring. On the cold engine the bimetallic plate takes away заслонку, opening the additional air channel. In the course of engine warming up on the valve pressure moves, the bimetallic plate heats up and, moving заслонку, blocks giving of additional air in the engine. The quantity of the additional air passing through the valve, is measured by a measuring instrument of a stream of air on the basis of which information duration of injection of fuel is corrected, therefore at engine warming up in the engine mix fuel-air arrives большее quantity.

For temperature measurement it is used two gauges. One gauge takes temperature of a cooling liquid in system of cooling of the engine, the second gauge takes temperature of air arriving in the engine. Gauges represent the resistors which resistance decreases at temperature increase.