Skoda Felicia

Since 1994 of release

Repair and car operation

Shkoda Felitsija
+ Cars of mark Skoda Felicia
+ The maintenance instruction
+ Routine maintenance
+ Engine repair
+ Systems of cooling, heating
- The power supply system
   + The power supply system of the carburettor engine of 1.3 l
   + System of the central injection (SPFI) the petrol engine
   + System of the distributed injection (MPFI) the petrol engine
   + The power supply system of the diesel engine
   - Systems of decrease in toxicity and release of the fulfilled gases
      System of catching of fuel evaporations - the general information and replacement of components
      Ventilation system картера - the general information
      Removal and l-probe installation
      System recycling the fulfilled gases (EGR) - the general information and replacement of components
      Removal and installation of a final collector
      Release system - the general information and replacement of components
      The Katalitichesky converter - the general information and safety measures
+ Engine electric equipment
+ Coupling
+ Transmission
+ Power shafts
+ Brake system
+ Suspension bracket and steering
+ Body and salon furnish
+ Onboard electric equipment

Systems of decrease in toxicity and release of the fulfilled gases

System of catching of fuel evaporations - the general information and replacement of components

Systems of decrease in toxicity of the fulfilled gases

For refuelling of all petrol models it should be used only неэтилированное fuel. The control system of the engine carries out the general control over functioning of the power unit, providing optimum parities between capacity developed by the engine, controllability of the car and structure of the fulfilled gases. In addition the car is equipped by a number of the systems providing decrease of toxicity of fulfilled gases. All petrol engines are standardly equipped by ventilation system картера and catalytic the converter. At the expense of functioning of the given systems the general level of issue in atmosphere of toxic products of combustion of fuel and картерных gases decreases. Besides the mentioned systems, petrol models are equipped also with system of catching of fuel evaporations.

The ventilation system картера is included also into a standard complete set of all cars of models equipped with the diesel engine. In addition diesel models are equipped two-functional catalytic with the converter and system recycling the fulfilled gases (EGR), allowing to lower the general level of toxicity of issue.

Ventilation system картера

With a view of issue decrease in atmosphere картерных the gases containing not burnt down hydrocarbonic connections, the engine block is executed tightly, and breaking combustion accumulating in it from chambers gases and oil evaporations is deduced from картера and through an air cleaner arrives in combustion chambers where are burnt out in the course of normal functioning of the engine.

Under the influence of deep depression in the inlet pipeline (movement on single turns or braking by the engine) картерные gases are extended from the engine самотеком. At decrease in depth of depression (an acceleration, movement with completely open throttle заслонкой) the conclusion of gases and evaporations occurs at the expense of relative increase внутрикартерного pressure. As a result of deterioration of components of piston groups and engine cylinders внутрикартерное pressure raises at the expense of more intensive break of gases from combustion chambers that leads to the compelled return of a part of a deduced stream at any depression in the inlet pipeline.

Control system of structure of the fulfilled gases (petrol models)

For the purpose of minimisation of level of toxicity of the fulfilled gases of the engine thrown out in atmosphere into system of release of all petrol models enters каталитический the converter. Established in a path of system of release the oxygen gauge (l-probe) closes a contour of a feedback of the power supply system, informing ECU control systems of the engine on maintenance level About₂in the fulfilled gases. On the basis of the analysis of arriving data ECU carries out corresponding updating of structure of an air-fuel mix, optimising thereby process of its combustion.

In the oxygen gauge the heating element which functioning through the special relay operates ECU is built in. An element problem is acceleration of warming up of a l-probe to optimum working temperature. The working tip of the gauge is sensitive to the maintenance in surrounding space of oxygen. As a result, depending on level оксидации the fulfilled gases, the gauge gives out on ECU a signal of corresponding amplitude. The minimum toxicity of products of combustion of an air-fuel mix is reached at absolutely certain weight parity of its components, namely: on 1 weight part of fuel 14.7 parts of air should have. The given parity is called стехиометрическим as number. Change of amplitude of a target signal of the gauge near to this point occurs the big steps that allows ECU to use arriving signals as basic at calculation of demanded structure of a gas mixture. Updating of structure of a mix is carried out at the expense of change of duration of opening of injectors of injection of fuel. The description of procedures of removal and l-probe installation is resulted in Section Removal and l-probe installation.

Control system of structure of the fulfilled gases (diesel models)

Two-functional каталитический the converter is established in system of release of the fulfilled gases of all diesel models. The converter allows to prevent issue in atmosphere большей parts of gaseous hydrocarbonic connections, монооксида carbon (WITH) and firm microparticles.

In addition, diesel models are equipped with system recycling the fulfilled gases (EGR). The system allows to lower level of issue formed at combustion of an air-fuel mix of toxic oxides of nitrogen for periodic the account of return of a part of the fulfilled gases in the inlet pipeline. Return of the fulfilled gases is made through плунжерный valve EGR under certain conditions engine functioning. The control over system EGR functioning provides the electronic block of management with a diesel engine.

System of catching of fuel evaporations (petrol models)

For the purpose of issue minimisation in atmosphere of not burnt down hydrocarbonic connections all petrol models are equipped by system of catching of fuel evaporations. The jellied mouth of a fuel tank is closed by a tight cover. On a mudguard of an arch of the left wheel the coal adsorber in which all are taken away accumulating during car parking in a tank fuel evaporations is established. Evaporating fuel accumulates in an adsorber and after engine start are deduced from it through плунжерный the purge valve in an inlet path where it is burnt in the course of normal functioning of the car. For the purpose of protection каталитического the converter from consequences of reenrichment of a mix in the course of warming up of the engine or in its operating time on single turns, ECU does not suppose opening of the valve of management by a purge of an adsorber to a definitive warming up of the unit. At loading increase on the engine the electromagnetic valve starts to function in a pulse mode, carrying out a consecutive conclusion of a contained adsorber in an inlet path of the engine.

Release system

The system of release of the fulfilled gases consists of a final collector, a reception pipe, каталитического the converter, two box-shaped mufflers, the complete set of basic arms and tubular connecting sections. On diesel models and petrol models 1.6 of l каталитический the converter is included in structure of section of a reception pipe of system of release whereas on l models 1.3 the reception pipe and the converter are established separately from each other.