since 1994 release
Repair and operation of the car
+ Running gear
+ Regular servicing
+ System of an exhaust
+ Cooling system
+ Fuel tank and fuel pump
+ Air filter and channels of absorption
- System of injection
- 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)
Cable of a butterfly valve
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
+ System of ignition
+ 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 which are put in action in the electromagnetic way, and, respectively, amount of injectable fuel. For this purpose the characteristics of the engine representing collection of data on all imaginable situations of the engine about amount of fuel, necessary for each situation, and the corresponding moment of ignition are made to the control unit available. The control unit can vary still characteristics after receipt of the so-called correcting signals (for example, temperature of the soaked-up air and cooling liquid).
Control unit of a butterfly valve
In the so-called control unit of a butterfly valve three separate knots known on other systems of injection as functional blocks are integrated.
It is in the distributor of fuel and regulates its pressure upon injectors. For this purpose information on level of the lowered pressure is transferred to it in an inlet collector. Idling at the closed butterfly valve and very low pressure it holds lower pressure. With pressure drop at the raised load of the engine the regulator of pressure increases fuel pressure. The fuel pump creates much more high operational pressure, but by means of pressure regulator return of gasoline to a fuel tank respectively increases or decreases.
At each turn of the crankshaft they inject gasoline into the canal of absorption in front of the inlet valve of the corresponding cylinder – duration is defined by the control unit.
The sensor of temperature of the soaked-up air
At the 110 kW turbo engine he is in an airintaking hose and can precisely take air temperature, served by a turbocompressor. Information on temperature comes to the control unit in the form of resistance size. It is used for an optimum dosage of fuel. The hot turbocompressor depending on a working condition strongly heats the soaked-up air.
Sensor of temperature of cooling liquid
Temperature of cooling liquid is used at management of several functions of injection: at enrichment of 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 to 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 temperature goes down to the Arctic level of -25 °C.
Measuring instrument of a stream of fresh air
In a stream of the soaked-up air there is an electroconductive plate which is warmed up in the electroway. Depending on amount of the soaked-up air its stream which cools a plate stronger or more weakly changes. Change of temperature causes change of electric resistance of the conductor. This measured size is used by the control unit.