6.3. System of catching of vapors of fuel

Scheme of system of catching of vapors of fuel

The scheme of the control system and decrease in toxicity of the fulfilled gases and catching of vapors of fuel of the engine of 1,6 l with system of onboard diagnostics

1 – relay of management
2 – ESM amplifier
3 – ignition lock
4 – ignition coil
5 – spark plug
6 – sensor of position of the camshaft
7 – valve of ventilation of a case
8 – measuring instrument of an expense and sensor of air temperature
9 – acceleration sensor
10 – ECM
11 – air filter
12 – valve of a control system of idling rotation frequency

13 – sensor of provision of a butterfly valve
14 – the valve of cleaning of a canister with absorbent carbon
15 – a canister with absorbent carbon
16 – fuel tank
17 – muffler
18 – sensor of an angle of rotation of a bent shaft
19 – detonation sensor
20 – sensor of temperature of cooling liquid
21 – oxygen sensor
22 – catalytic converter
23 – oxygen sensor

The scheme of the control system and decrease in toxicity of the fulfilled gases and catching of vapors of fuel of engines 1,6/1,8 / 2,0 of l (ethylated fuel)

1 – relay of management
2 – ESM amplifier
3 – ignition lock
4 – ignition coil
5 – spark plug
6 – sensor of position of the camshaft
7 – valve of ventilation of a case
8 – measuring instrument of an expense and sensor of air temperature
9 – ECM
10 – valve of a control system of idling rotation frequency
11 – air filter

12 – sensor of provision of a butterfly valve
13 – the valve of cleaning of a canister with absorbent carbon
14 – a canister with absorbent carbon
15 – fuel tank
16 – muffler
17 – sensor of an angle of rotation of a bent shaft
18 – detonation sensor
19 – sensor of temperature of cooling liquid

The system of catching of vapors of fuel prevents evaporation of vapors of fuel in the atmosphere from the fuel tank therefore formation of a photochemical smog is prevented.

Vapors of fuel accumulate in a canister with absorbent carbon. During the operation of the engine the electronic control unit opens the valve, and vapors of fuel come to the engine where there is their combustion.
The control valve is used for management of pressure of vapors of fuel in the fuel tank.

Check

 PERFORMANCE ORDER

  1. Disconnect a vacuum hose from throttle knot and instead of it connect the vacuum pump with a vacuum hose.
  2. Check the following parameters on the cold engine at a temperature of cooling liquid less than 60 °C and on the hot engine at a temperature of cooling liquid more than 80 °C.

Cold engine

Operational power setting
Depression
Result
Idling
50 kPa
Vacuum is supported
3000 min. –1

Hot engine

Operational power setting
Depression
Result
Idling
50 kPa
Vacuum is supported
Within 3 min. after increase in frequency of rotation up to 3000 min. –1
Attempt of change of a razrezhfeniye
Vacuum is absent
In 3 min. after increase in frequency of rotation up to 3000 min. –1
50 kPa
Vacuum is supported quickly then is absent