since 1994 of release
Repair and car operation
+ Running gear
+ Regular servicing
+ exhaust System
+ cooling System
+ Fuel tank and fuel pump
+ Air filter and absorption channels
- Injection system
- System of injection of Motronic
The major knots
So the system of injection of Motronic functions
Violations in work and self-diagnostics
The self-help at injection
Search of malfunctions in separate knots
Check of idling and exhaust gases
Check of exhaust gases (AU)
Butterfly valve cable
The help at malfunctions
+ System of injection of MPI and MPFI
+ Transmission and main transfer
+ Suspension bracket of wheels and steering
+ Wheels and tires
+ Electrotechnical equipment
+ ignition System
+ Alarm equipment
+ Tools and devices
+ Heating and ventilation
+ body Details
Search of malfunctions
The major knots
Electronic control unit
The control unit in an electronic box via the mnogoshtyrkovy socket receives information:
On the basis of information on number of turns and pressure in an inlet collector the control unit counts duration of opening of the injectors putting in action by an electromagnetic way, and, respectively, amount of injected fuel. For this purpose in the order of the control unit the characteristics of the engine representing collection of data on all conceivable situations of the engine, about amount of fuel necessary for everyone situation and the corresponding moment of ignition are provided. The control unit can vary still characteristics after receipt of so-called correcting signals (for example, temperature of soaked-up air and cooling liquid).
Control unit butterfly valve
In the so-called control unit a butterfly valve three separate knots known on other systems of injection as functional blocks are incorporated.
It is in the distributor of fuel and regulates its pressure upon injectors. For this purpose information on level of the lowered pressure in an inlet collector is transferred to it. Idling at the closed butterfly valve and very low pressure it holds lower pressure. With pressure drop at raised load of the engine the regulator of pressure increases pressure of fuel. The fuel pump creates much more high operational pressure, but by means of a pressure regulator return of gasoline to a fuel tank respectively increases or decreases.
At each turn of the crankshaft they inject gasoline into the absorption canal in front of the inlet valve of the corresponding cylinder – duration is defined by the control unit.
The sensor of temperature of soaked-up air
At a turbodvigatel in capacity of 110 kW it is in an airintaking hose and can precisely measure the air temperature, submitted by a turbokompressor. Information on temperature arrives in the control unit in the form of resistance size. It is used for an optimum dosage of fuel. The hot turbokompressor depending on a working condition strongly heats up soaked-up air.
The sensor of temperature of cooling liquid
The temperature of cooling liquid is used at management of several functions of injection: at enrichment of a fuel and air mix during start of the cold engine, poststarting enrichment (on all range of temperatures), at enrichment during accelerations and draft shutdown. Information on temperature of cooling liquid is transferred in the control unit also in the form of resistance size. He counts the correct time of injection which in the heated-up engine makes from 2 to 8 ms. This size can increase almost for 70 % when the temperature goes down to the Arctic level of-25 °C.
Measuring instrument of a stream of fresh air
In a stream of soaked-up air there is an electrocarrying-out plate which is warmed up in the electroway. Depending on amount of soaked-up air its stream which more strongly or more poorly cools a plate changes. Change of temperature causes change of electric resistance of the conductor. This measured size is used by the control unit.