Dacia SuperNova (engine E7J). Manual - part 20

14

E7J-A-2/60 ENGINE

ANTI-POLLUTION

1.  

I NTAK E

 

CO LLECTOR

2.

CARBO N

 

CANISTER

3.

DRAINING

 

VALVE

4.

CLAPPER

 

BO DY

R.

CH ANNELING

 

FRO M

 

TH E

 

TANK

PETROL VAPOURS-ASPIRATION

FUNCTIONING SCHEMA

14 - 1

14

E7J-A-2/60 ENGINE

ANTI-POLLUTION

RE-ASPIRATION CONDITIONS

The canister-purging valve is controlled by pin 4 of the UCE injection, when :

- water temperature > 50

o

C;

- air temperature > 15

o

C;

- the valve position outside idle position.

It is possible the reading of the RCO value ( opening cyclic ratio ) of the canister

purging valve, by means of the CLIP tester.

THE CHECKING OF THE CANISTER PURGING VALVE OPERATION

A non-operation of the petrol vapors re-aspiration system may lead to the fuel con-

sumption increase and to a unstable idling.

     It is necessary to check if the purging valve exit is correctly connected to the carbon

canister. Check also the piping condition between the canister and the fuel tank (sealing,
clogging on layout).

PETROL VAPOURS-ASPIRATION

14 - 2

1. 

CO LLECTEUR

 

ADMISSION

2. 

SO UPAPE

 

PURG E

3. 

CANISTER

4. 

RESERVO IR

14

E7J-A-2/60 ENGINE

ANTI-POLLUTION

Check at idling if there is a depression, by fitting a pressure gauge (-3…+ 3 bars) at the

purging valve exit (B) towards canister.

Is there any depression?

YES - Set off the contact . Using a vacuum pump, apply a 500 mbars depression at

the (C ) connection of the purging valve. The value of the read depression must not vary
more than 10 mbars within 30 seconds. If change is more than 10 mbars, then purging
valve is damaged and must be replaced. Valve cleaning of small active carbon particles
may be tried, by low-pressure compressed air blowing at the valve (B) connection

NO - When conditions of purging valve controlling are accomplished and this one

does not open, check its control electric circuit ( between UCE injection pin 4 and purging
valve), from continuity or short-circuit point of view.

The RCO value of the signal received by the purging valve from the computer, may be

read by means of the CLIP tester in PROL 23. The minimal value is of 0.7% (corresponding
to the closed position of the purging valve).

P

LACING

 -  D

ISMO UNTING

Both the carbon canister and the draining valve are mounted by means of a stand on the

lining of the right-side front wing of the car.

The channellings of the canister and the electric conector commanding the draining

valve are disconnected;

The sleeve for fixing the draining valve is taken off and the valve is taken apart.
The carbon canister is taken apart.

R

EMOUNTING

Perform in the reverse order the dismounting operations.

14 - 3

PETROL VAPOURS-ASPIRATION

E7J-A-2/60 ENGINE

16

16 - 1

STARTING AND CHARGING

I

DENTIFICATION

     E

NGINE

                    A

LTERNATOR

     I

NTENSITY

E7J - A-2/60

VALEO  A11 VI 87

75A

VALEO  A13 VI 212

80A

I

NSPECTION

After 15 minutes’ warming under a 13.5 V voltage.

ENGINE REVOLUTION

A

LTERNATOR

  75 A

A

LTERNATOR

  80A

RATIO   (rot/min)

(A)

(A)

1000

46

54

2000

68

75

3000

71

80

4000

72

82

FUNCTIONING AND DIAGNOSING

These cars are equipped with internal ventilation alternators, with in-built voltage regu-

lator and on-board light indicator, which must work as follows:

-when the contact is on, the light is on;
-when the engine starts, the light goes out;
-if the light is on again as the engine is running, then it indicates a charging dysfunc-

tion.

S

H O OT

 - 

FINDING

 

INCIDENTS

  A.The light does not turn on when the contact is on.

To check:

-if the electric connections are done properly;
-if the light of the board indicator is working properly (when the circuit is set to the

mass, the light must turn on).

ALTERNATOR