Opel Astra, Zafira

Since 1998 of release

Repair and car operation

Principle of functioning of systems of injection of fuel

System of central injection Multec

The basic components of system of central injection Multec (engines of 1.6 l SOHC)

System Multec structure (the Basic components of system of central injection Multec (engines of 1.6 l SOHC see an illustration)) includes following components: каталитический the converter of the closed type, system of catching of fuel evaporations (EVAP) and рециркуляции the fulfilled gases (EGR). By efficiency of functioning the system answers all with requirements of the international standards. The description of a principle of functioning responsible for injection of fuel the engine of a part of system is more low resulted. The information on functioning of a subsystem of ignition is resulted in the Head an engine Electric equipment.

Placed in a fuel tank погружной the fuel pump provides fuel giving under pressure to a fuel highway, on the way banishing it through the fuel filter established behind under the car. The pressure of giving of fuel is defined established on the case of a throttle by a pressure regulator. Surplus of fuel on a returnable line goes back to a fuel tank.

The electric part of a control system consists of the electronic module of management (ECM) and following information gauges:

• The gauge throttle заслонки (TPS) informs positions (potentiometer) ECM on position throttle заслонки;
• The gauge of temperature of a cooling liquid (ECT) informs ECM on temperature of a cooling liquid of the engine;
• The ljambda-probe (for Great Britain) informs models ECM on concentration of the maintenance in the fulfilled gases of molecules About _{2 (}Systems of release and decrease in toxicity of the fulfilled gases more in detail see);
• The gauge of position of a cranked shaft (CKP) informs ECM on turns of the engine and position of a cranked shaft;
• The detonation gauge (KS) informs ECM on occurrence of signs of early ignition;
• The gauge of absolute pressure in the inlet pipeline (MAP) informs ECM on loading on the engine, tracing depth of depression in the inlet pipeline;
• The block of management of system of antiblocking of brakes (ABS) informs ECM on speed of movement of the car;
• The gauge-switch of a central air of air (at a corresponding complete set) notifies ECM on the fact of inclusion of the conditioner.

The arriving information is processed ECM which then gives out commands of management of ignition and opening of an injector of injection of fuel. Management of an injector occurs by change of width of an operating electric opening impulse that allows to make with the minimum delay updating of structure of an air-fuel mix at change of external factors. Thanks to possibility of such updatings engine return is supported on a maximum level at any stage of functioning of the unit: at start, during warming up, at an acceleration, деселерации and movement with constant speed.

ECM exercises administration also idling turns. Necessary updatings are made by activation of the throttle of the step-by-step electric motor established on the case. The engine on commands ECM makes opening/perekryvanie перепускного the channel, in case of need (for example, at closed or being in position of idling throttle заслонке) starting up air bypassing the throttle chamber.

Besides, ECM exercises administration of functioning of system of catching of fuel evaporations EVAP (Systems of release and decrease in toxicity of the fulfilled gases see).

If from gauges the information testifying to occurrence not of a supernumerary situation arrives, ECM is switched in functioning emergency operation when instead of inadequate signals base values of corresponding parametres are substituted, - efficiency of return of the engine in such mode, naturally decreases. About input ECM in emergency operation of the driver warns operation of a control lamp of refusals on an instrument guard of the car (the Operation manual see the Head), in memory of the processor the corresponding diagnostic code (the engine Electric equipment see the Head) is thus brought.

Diagnostic socket DLC is located in the central console ahead of the lever of a lay brake under a decorative cover

Site of socket DLC in the console

The decorative cover is removed

At operation of a control lamp the car should be driven away at the first possibility on firm car repair shop Opel for carrying out of detailed diagnostics with application of the special equipment and performance of necessary regenerative repair (illustrations Diagnostic socket DLC see it is located in the central console ahead of the lever of a lay brake under a decorative cover and the Site of socket DLC in the console).

The diagnostic equipment (the input reader сканерного type) is connected to located under a decorative overlay under ahead lever of a lay brake to a DLC-socket.

System of distributed injection Multec-S

The basic components of system of central injection Multec-S (engines of 1.4 and 1.6 l DOHC)

The basic components of system Multec-S (the Basic components of system of central injection Multec-S (engines of 1.4 and 1.6 l DOHC see an illustration)) are: каталитический the converter of the closed type, system of catching of fuel evaporations (EVAP) and рециркуляции the fulfilled gases (EGR). By efficiency of functioning the system answers all with requirements of the international standards. The description of a principle of functioning responsible for injection of fuel the engine of a part of system is more low resulted. The information on functioning of a subsystem of ignition is resulted in the Head an engine Electric equipment.

Placed in a fuel tank погружной the fuel pump provides fuel giving under pressure to a fuel highway, on the way banishing it through the fuel filter established behind under the car. The pressure of giving of fuel is defined established on the case of a throttle by a pressure regulator. Surplus of fuel on a returnable line goes back to a fuel tank.

The electric part of a control system consists of the electronic module of management (ECM) and following information gauges:

• The gauge throttle заслонки (TPS) informs positions (potentiometer) ECM on position throttle заслонки;
• The gauge of temperature of a cooling liquid (ECT) informs ECM on temperature of a cooling liquid of the engine;
• The gauge of temperature of soaked up air (IAT) informs ECM on temperature of air soaked up in the inlet pipeline;
• The ljambda-probe (for Great Britain) informs models ECM on concentration of the maintenance in the fulfilled gases of molecules About _{2 (}Systems of release and decrease in toxicity of the fulfilled gases more in detail see);
• The gauge of position of a cranked shaft (CKP) informs ECM on turns of the engine and position of a cranked shaft;
• The gauge of position of a camshaft (CMP) informs ECM on position and frequency of rotation of a final camshaft;
• The detonation gauge (KS) informs ECM on occurrence of signs of early ignition;
• The gauge of absolute pressure in the inlet pipeline (MAP) informs ECM on loading on the engine, tracing depth of depression in the inlet pipeline;
• The block of management of system of antiblocking of brakes (ABS) informs ECM on speed of movement of the car;
• The gauge-switch of a central air of air (at a corresponding complete set) notifies ECM on the fact of inclusion of the conditioner.

The arriving information is processed ECM which then gives out commands of management of ignition and opening of an injector of injection of fuel. Management of an injector occurs by change of width of an operating electric opening impulse that allows to make with the minimum delay updating of structure of an air-fuel mix at change of external factors. Thanks to possibility of such updatings engine return is supported on a maximum level at any stage of functioning of the unit: at start, during warming up, at an acceleration, деселерации and movement with constant speed. Multec S is system of consecutive injection in which each of 4 injectors of injection works at the moment of the beginning of opening of the corresponding inlet valve.

ECM exercises administration also idling turns. Necessary updatings are made by activation of the throttle of the step-by-step electric motor established on the case. The engine on commands ECM makes opening / перекрывание перепускного the channel, in case of need (for example, at closed or being in position of idling throttle заслонке) starting up air bypassing the throttle chamber.

Besides, ECM exercises administration of functioning of system of catching of fuel evaporations EVAP (Systems of release and decrease in toxicity of the fulfilled gases see).

If from gauges the information testifying to occurrence not of a supernumerary situation arrives, ECM is switched in emergency functioning when instead of inadequate signals base values of corresponding parametres are substituted, - efficiency of return of the engine in such mode, naturally decreases. About input ECM in emergency operation of the driver warns operation of a control lamp of refusals on an instrument guard of the car (the Operation manual see the Head), in memory of the processor the corresponding diagnostic code (the engine Electric equipment see the Head) is thus brought.

At operation of a control lamp the car should be driven away at the first possibility on firm car repair shop Opel for carrying out of detailed diagnostics with application of the special equipment and performance of necessary regenerative repair.

System of distributed injection Simtec-70 ч

The basic components of system of central injection Multec-S (engines of 1.8 and 2.0 l DOHC)

By a principle of functioning system Simtec-70 (the Basic components of system of central injection Multec-S (engines of 1.8 and 2.0 l DOHC see an illustration)) is almost identical to system to the system Multec S considered above. The basic difference consists in use in an inlet air path instead of gauge MAP of the gauge of measurement of weight of air (MAF) film type on an admission. The gauge of measurement of weight of air (MAF) informs ECM on quantity of air arriving in the inlet pipeline.

One more feature of system is application of the inlet pipeline of the variable length, allowing to make increase developed by the engine on small turns of a twisting moment. The inlet pipeline is equipped by the special valve, management of which functioning carries out ECM by means of an electromagnet and диафрагменного knot. At turns of the engine less than 3600 in a minute the valve remains closed, - in this case air passes on longer way, providing increase in a twisting moment of the engine. On high turns the valve at the command of ECM opens, providing giving of depression of the pipeline on диафрагменный the knot exercising administration by functioning to four valves which operation allows in the necessary degree to reduce length of a way of passage of air on the pipeline for the purpose of increase in the traction characteristic of the engine at high turns.