since 1993 release
Repair and operation of the car
+ Operation manual
+ Routine maintenance
+ Repair of the engine
+ Cooling systems, heating
- Power supply system and release
- A power supply system - petrol models
Removal and installation of assembly of the air cleaner
Removal, installation and adjustment of a cable of gas
Removal and installation of the accelerator pedal
Unleaded fuel - the general information and rules of use
Systems of injection of fuel - the general information
Dropping pressure in a power supply system
Removal and installation of the fuel pump
Removal and installation of the sensor of fuel consumption
Removal and installation of the fuel tank
Check of a state and adjustment of system of injection of fuel
Removal and installation of the case of a throttle
Removal and installation of components of the Bosch Motronic 5.1 system
Removal and installation of components of the Magneti-Marelli 8P system
Removal and installation of the inlet pipeline
Removal and installation of a final collector
+ A power supply system - diesel models
+ Systems of decrease in toxicity and production of the fulfilled gases
+ Engine electric equipment
+ Power shafts
+ Uniform hydraulic system
+ Brake system
+ Running gear and steering
+ Body and finishing of salon
+ Onboard electric equipment
+ Schemes of electric equipment
Systems of injection of fuel - the general information
The MP5.1 Bosch Motronic system (models of 1.8 l with RKPP)
The control system of the MP5.1 Bosch Motronic engine (see an illustration the Function chart of system of the distributed injection of Bosch Motronic of MP5.1) is used at a complete set of models of 1.8 l with RKPP. The system which part the catalytic converter of the closed contour and system of catching of fuel evaporations is meets the latest standards of environment protection. Detailed information on functioning of the part of system which is responsible for installations of ignition is provided in the Head Elektrooborudovaniye of the engine. The principle of supply of fuel in the engine is described below.
The fuel pump shipped in a gasoline tank carries out supply of fuel to the fuel highway of system of injection. The path of supply of fuel switched on the linear fuel filter preventing a contamination of injectors. The pressure of supply of fuel is controlled by pressure regulator installed to the fuel highway. If pressure in a power supply system rises above a preset value, the regulator provides excess fuel return back to a gasoline tank. All four injectors open at the same time at each turn of a bent shaft and provide injection of fuel in the inlet pipeline.
The electric control system consists of ECU and a set of information sensors:
ECU, on the basis of the analysis of the signals arriving from information sensors defines optimum composition of air-fuel mix of time at the moment and corrects it by adjustment of duration of opening of injectors of injection. Thus, the composition of mix is constantly controlled by ECU and all the time answers the current operating conditions of the engine (warming up, single turns, the movement with cruiser the speed, acceleration, braking by the engine, etc., etc.).
ECU exercises also complete control over idling turns via the valve of additional air in case of need providing a possibility of a perepuskaniye of the soaked-up air bypassing a throttle. At the closed butterfly valve of ECU operates opening of the valve, regulating thereby air supply in the inlet pipeline and supporting engine turns at the required level.
Besides the listed functions, ECU exercises control of functioning of systems of release and catching of fuel evaporations (see Systems of decrease in toxicity and production of the fulfilled gases).
The case of a throttle is equipped with an electric heating element, giving of power supply on which is also controlled by ECU, carrying out heating of the throttle camera at cold starts and preventing frosting of a butterfly valve.
Air moves in cylinders via four inlet channels with various cross section which is (consistently increasing). Air supply is regulated by a butterfly valve. The air filter is built in a head of cylinders and its cover at the same time serves as a head cover (see the illustration Scheme of Air Supply in the engine). Besides an air filtration the air cleaner serves also as an oil separator for removal of crankcase gases.
In case of violation of serviceability of functioning of any of information sensors, ECU automatically passes into the mode of the closed contour. At the same time the false data arriving from the faulty sensor are ignored and instead of them some average value of under control parameter put in memory of the control unit is used. Efficiency of functioning at the same time, remaining quite adequate, can decrease a little. Transition of system to the mode of the closed contour is followed by inclusion of the control lamp which is built in in an instrument guard. In the block of memory of ECU the corresponding code of malfunction registers.
At operation of a control lamp the car at the first opportunity should be driven away on car repair shop where full diagnostics of a control system of the engine with use of the special electronic reader will be made. The diagnostic socket for connection of the reader is located near the assembly block of safety locks on the car dashboard.
The Magneti-Marelli 8P system (models of 1.6 l, 1.8 l [with AT] and 2.0 l [except RFY])
The control system of the Magneti-Marelli 8P engine (see an illustration the Function chart of system of the distributed Magneti-Marelli 8P injection ) is used on models of 1.6 l, 1.8 l from AT and 2.0 l with 8-valvate engines. Information on functioning of the part of system which is responsible for installations of ignition is provided in the Head Elektrooborudovaniye of the engine.
The system by the principle of functioning is very close to Bosch MP5.1 described above. The only difference is made by a control system of idling turns.
In the Magneti-Marelli ECU system exercises control of idling turns by means of the special step motor installed on the throttle case. The motor is equipped with the pusher controlling extent of opening of the bypass canal on which air is bypassed in the inlet pipeline bypassing the throttle camera. At the closed butterfly valve of ECU exercises control of air supply in the inlet pipeline by means of the step motor, providing control over idling turns. The bypass is used also as a source of additional air at cold starts of the engine.
MP3.2 Bosch Motronic system (model of 2.0 l of RFY)
This system (see an illustration the Function chart of system of the distributed injection of Bosch Motronic of MP3.2 ) is used on models of 2.0 l with 16-valvate engines (RFY) and in the present manual is not subject to detailed consideration. Let's notice only that many components perform the same functions that the same components of the Magneti-Marelli system, taking into account the listed below differences.
Injection injectors in the distributive pipeline have individual management. Fuel is injected into cylinders in turn through each two turns of a bent shaft.
The regulator of pressure of fuel provides a constant pressure in 3 bars at any modes of operation of the engine.
The system of an admission of air of 16-valvate RFY engines has a special design. Let's not go deep in particular functioning of the inlet pipeline, we will specify only that the pipeline consists of two channels of various length and various cross section. This system allows to achieve increase in torque of the engine on low turns.
ECU provides interruption in supply of fuel at the movement with a setup on turns lower than 1280 a minute and renews food at excess of this value.
For protection of the engine against overloads the injection of fuel is interrupted at excess by the frequency of rotation of the engine of value in 6840 rpm. The RPM meter is installed on a head of cylinders.
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