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6-6-sistema-ulavlivaniya-parov-benzina-evap.html
6.6. Catching system паров gasoline (EVAP) General description
The EVAP system scheme on the M10 engine (the others - similarly)
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This system is usually established on the cars equipped with the catalytic converter. |
When the engine is muffled, fuel in a fuel tank evaporates, created pressure паров. The catching system паров gasoline accumulates these pairs in capacity with an adsorber. Under way the removal valve паров is a little slightly opened and fuel pairs gradually arrive in the inlet pipeline and burn down. When start of the cold engine or the engine is made idles, the removal valve паров does not allow pairs to arrive in the inlet pipeline and to enrich a fuel mix excessively.
Removal valves паров two types are applied: with electric management and vacuum management. To define, what valve is established on your car, track a hose from capacity with an adsorber, yet will not find the valve. Some valves are established on the inlet pipeline, others - near capacity with an adsorber. Look, whether there is on the valve an electric socket or the vacuum line approaches to it.
The faulty system EVAP influences road performance of the engine only when it is heated-up. The EVAP system usually is not at the bottom of difficult cold start or other problems on the cold engine.
Check
Removal valve паров vacuum-operated
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- Disconnect from the valve the vacuum line and blow in the bigger union of the valve. The valve should be closed and air should pass.
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On some models the thermovacuum valve is established, which interferes with removal паров, while the temperature of a cooler will not reach, about, 46 ° S.Proverte this valve to be convinced of its operation under the influence of a razryazheniye at the correct temperature. The valve is usually located in the inlet pipeline near the temperature switch and the sensor of temperature of a cooler. |
- Disconnect from the removal valve паров a thin vacuum hose and the manual vacuum pump on an entrance of the valve create a razryazheniye. The valve should open and start to pass air.
- If the test yields negative result, replace the valve.
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The removal valve паров with electric management
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- Disconnect from the valve all lines (except the electric socket) and move it to a place convenient for testing.
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- Check that the valve at inclusion of ignition publishes click.
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- If the valve does not publish click, disconnect from the valve the socket and a control lamp or the voltmeter check power supply.
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- If tension of the battery is present, but the valve does not work, replace it. If tension is absent, check the block of control of Motronic and a wire.
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Capacity with an adsorber
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- Note an arrangement of all hoses, then disconnect them from capacity.
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- Put forward capacity from a fixing collar. On some models it is necessary to weaken a collar.
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- Visually check on capacity existence of leaks and damages.
- At detection of leaks and damages replace capacity.
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