Subaru Forester

1997-2005 of release

Repair and car operation



Subaru Forester
+ Cars Subaru Forester
+ The maintenance instruction
+ Routine maintenance
+ The engine
+ Systems of cooling, heating
+ The power supply system and release
+ Engine electric equipment
- Control systems of the engine
   Specifications
   System of onboard diagnostics (OBD) - a principle of functioning and codes of malfunctions. Signals in management chains
   ЕСМ - the general information, an estimation of a condition and replacement
   Information gauges, the relay and actuation mechanisms - the general information
   System of catching of fuel evaporations (EVAP)
   System recycling the fulfilled gases (EGR)
   System of operated ventilation картера (PCV)
   The conductor of a jellied mouth of a fuel tank
   The Katalitichesky converter - the general information, check of a condition and replacement
+ Gear change box
+ Coupling, трансмиссионная a line
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
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System of catching of fuel evaporations (EVAP)

The general information

System EVAP accumulates accumulating in the power supply system during car parking fuel evaporations and provides their conclusion in an inlet path for burning in the course of normal functioning of the engine.

The scheme of functioning of system of catching of fuel evaporations (EVAP)


1  — the  Measuring instrument of the expense of fuel
2  — the  Inlet pipeline
3  — the  throttle Case
4  — the  Electromagnetic valve of a purge of an adsorber
5  — the  Electromagnetic valve of management of ventilation
6  — the  Coal adsorber
7  —  ECM

8  —  Perekidnoj the valve
9  — the  Electromagnetic valve of the control of pressure
10  — the  pressure Gauge in a fuel tank
11  — the  Gauge of temperature of fuel
12  — the  Gauge of level of fuel
13  — the  Fuel tank
14  —  Zapornyj the valve


System improvement is made continuously in process of toughening of requirements shown to environment protection.

The system structure includes a coal adsorber, the electromagnetic valve of management of an adsorber purge, запорный the valve, connecting lines and so forth

Fuel evaporations accumulating in a tank are deduced in a coal adsorber on испарительным to lines. The zapornyj valve is built in fuel lines.

Management of functioning of the valve of a purge of an adsorber carries out ECM, choosing the moment optimal for a purge, proceeding from working parametres of the engine, and also the information delivered by gauges of temperature and the expense of fuel.

The electromagnetic valve of management is included by pressure in испарительную a line of a fuel tank and serves for the pressure/depression control in a tank on the basis of the signals which are given out on ECM established in tank by the gauge of pressure.

Запорный the fuel valve

On all-wheel drive models запорный the valve is built in directly in испарительную a tube of a cover of a fuel tank. Lifting of level of fuel in a tank leads to aperture lock-out in a cover, leaving it a unique exit through испарительную a tube in a coal adsorber.

Design запорного the fuel valve


Cover of a jellied mouth of a fuel tank

The jellied mouths built in a cover the safety valve serves for formation prevention in a tank of excessively deep depression owing to passableness infringement испарительных lines.

In normal conditions the cover closes a mouth absolutely tightly at the expense of the rubber consolidation pressed on all perimetre of a mouth, and also thanks to that the valve () remains densely pressed by a spring to the saddle.

Design of a safety valve of a cover of a jellied mouth of a fuel tank


At increase of depth of depression in a tank atmospheric pressure wrings out a spring downwards that leads to valve opening. As a result pressure is levelled because in a tank external air gets.

Coal adsorber

The general information

The coal adsorber is filled by the activated coal and serves for time accumulation of fuel evaporations and is blown on signal ECM at opening of the special electromagnetic valve (see more low). From an adsorber fuel evaporations arrive in in the inlet pipeline and are burnt in the course of normal functioning of the engine.

Design of a coal adsorber

1  —  Air
2  — the  Spring
3  —  From a fuel tank
4  —  To the electromagnetic valve of a purge
5  — the  Lattice
6  — the  Filter
7  —  Coal наполнитель
8  — the  Filter

 


Removal and installation

 PERFORMANCE ORDER

1. Поддомкратьте the car also establish it on props.
2. Release a clamp and disconnect from assemblage of a coal adsorber испарительные lines.
3. Give fixing nuts and remove an adsorber with кузовного an element.

Installation is made upside-down. Track, that the fixture has been tightened with demanded effort (23 7 Nanometers).

The electromagnetic valve of management of a purge of a coal adsorber

The general information

The valve is included in испарительную a line connecting an adsorber with the case of a throttle, from outside the inlet pipeline. Management of a purge carries out ECM, being based on the information on current operational parametres (temperature of a cooling liquid, engine turns, speed of movement, etc.). The purge is made at the started engine, except for certain conditions, such for example, as work on single turns.


Removal and installation

If the stereosystem established on the car is equipped by a security code before to disconnect the battery make sure that have a correct combination for audiosystem input in action!


 PERFORMANCE ORDER

1. Disconnect a negative wire from the battery.
2. Remove the delivery chamber of an air path in gathering with an air inlet (see Has undressed the Regulator of pressure of fuel - the general data of the Head of the Power supply system and release).
3. Turn out a bolt of fastening of the electromagnetic valve of a purge of an adsorber to the inlet pipeline.
4. Remove assemblage of the electromagnetic valve, disconnect from it electroconducting and vacuum hoses.

Installation is made upside-down. Track, that the fixture has been tightened with demanded effort (15.7 1.5 Nanometers).

The dvuhhodovyj valve

The double-thread valve is included in испарительную a line connecting a coal adsorber with a fuel tank.

Design of the double-thread valve

1  —  To a coal adsorber
2  — the  Case
3  — the  Saddle
4  — the  Cover
5  — the  Jet
6  —  From a fuel tank
7  — the  Valve
8  — the  Spring

 


When pressure in a tank exceeds some established value developed by a spring effort, the valve is overcome also opens, thus being in a tank under the pressure of evaporation are taken away in an adsorber where accumulate in a time наполнителя.

At lowering of pressure the valve is closed, however air getting into system through entrance port of an adsorber, continues to get into a tank through a small aperture in a valve end face, preventing formation of excessive depression.

The electromagnetic valve of management of pressure

The valve is included in испарительную a line connecting a fuel tank with a coal adsorber and allows ECM to carry out the control of pressure in a tank.

Design of the valve of management of pressure


1  —  To a coal adsorber
2  —  Plunzher
3  — the  Case
4  — the  Spring
5  — the  Plug of a contact socket

 


At working engine ECM on a signal from the gauge placed in a tank traces pressure in a tank. At excess by this pressure of some limiting value the management module gives out a special command on moving плунжера in the considered valve, carrying out thereby pressure dump.

At the muffled engine the valve works as the usual double-thread valve (see above).

The electromagnetic valve of management of ventilation

The ventilating valve is established in inlet port of the adsorber, connecting its internal capacity with atmosphere.

Design of the electromagnetic valve of management of ventilation

1  — the  Moving core
2  — the  Holder
3  — the  Sealing ring
4  — the  Core статора
5  —  Air
6  — the  Spring

7  — the  Valve
8  —  To a coal adsorber
9  — the  Sealing lining
10  — the  Shaft
11  — the  Winding


In a normal state the valve is opened also external air freely gets into an adsorber. At revealing of signs of leak of fuel evaporations in atmosphere ECM gives out a signal on valve closing, thus its rod moves to the right, blocking entrance port of an adsorber.

The air filter

The fuel filter is established in inlet port of the electromagnetic valve of management by ventilation of an adsorber and serves for clearing soaked up in last air.

Design of the air filter

1  —  the Input
2  — the  Exit
3  — the  Cover
4  — the  Arm
5  — the  Filtering element
6  — the  Casing