Chery Amulet Engine. Manual — part 14

2.2 PCV valve’s function:

Under the low speed condition, the vacuum of intake manifold

is very high, which keep the valve closed, and only a small opening
exists to allow the gas pass through. Therefore it won’t change the
mixture rate. Under high speed condition, the vacuum of intake
manifold decreases, and the spring forces the valve to open to allow
more gas in the crankcase flow into intake manifold.

The PCV valve is designed to open fully enough to allow the

gas exhaust from the crankcase under high speed or low speed
conditions.




【17】. Fuel supply system of the carburetor engine

1. Fuel supply system of the carburetor engine.

1.1 Description
of

the

fuel

supply system.
The fuel in the
tank flows into
oil

filter

pumped by the
fuel pump and
goes

into

carburetor after
being

filtered

through

fuel

pump.

A

amount of fuel
returns to the
tank

through

return pipe.

1.2 Removal and assembly of the fuel pump:
——Remove two M8 lock nuts.
——Take out the fuel pump.
——Remove the fuel pump sealing gasket.
——pull out the push rod.

From crankcase

From crankcase

The operation condition of low speed-high vacuity

To intake manifold

The operation condition of high speed- low vacuity
Fig.109

To intake manifold

Engine

Fig.110 schematic drawing of fuel supply system for engine
1. Gasoline tank 2. Gasoline filter 3. Gasoline pump
4. Carburetor 5. Return pipe

Fig. 111

——Remove the studs of same length.
Assembly:
——Submerge the push rod into the engine oil or pour engine
oil into the rod’s hole of the cylinder head and install the push
rod into the hole. The gap between push rod and hole is
0.035-0.055mm.
——Screw in the studs into the threaded hole and tighten with
the nuts.
——Install fuel pump with the manufacturer mark and part
number forward.
——Tighten the lock nuts with hands. Tightening torque is
14-18Nm.

Fig.112

【18】 Engine electrical system.
The electrical system includes battery, alternator, starter, breakerless distributor, ignition controller, spark plug,
high-power ignition coil, high pressure assembly, water temperature sensor, oil pressure switch, electric fan,
thermo switch, and idle speed solenoid valve of carburetor.

1. Alternator.
Output voltage:

14V

Rated output current:

90A

B+Output D+ to the charging indicator filling-in bit

——Battery is not permitted to be connected to alternator with
the polarities reversed.
——Insure that the ground wire between the alternator and
chassis are tightly connected.
——It is forbidden to ground the power supply wire while the
alternator is under working condition, the wiring harness will be
burn away.

——While the alternator is under working condition, it is not
allowed to disconnect the alternator connector B from battery, or
the voltage caused will damage the transistor or other elements.
——To test the diodes, the voltage applied should be not beyond
40V.
——During servicing the alternator, apply enough No.2 lithium
base grease into the alternator sealing bearing for the operation
period before the next service.
——The electronic regulator needs no service and may only be
replaced if damaged.


——The alternator type is: JFZ1913—4 and JFZ1813—ZB.

——The alternator bracket for vehicle is quite different from the
one for independent assembly. The former is applied on the engine
equipped with A/C compressor.
——The left figure is the alternator bracket for the vehicle.
——The corresponding alternators are not exchangeable.

Alternator assembly

Fig. 118

Alternator
assembly

Fig.119

The alternator
bracket

Fig. 120

The JFZ1913—4 alternator for independent assembly.








The JFZ18D13 ZB alternator for independent assembly

The alternator bracket for independent assembly

2.

Starter.

Rated output:

0.95kW

Speed range:

1000-1800r/min

Voltage:

12V

Type:

QDY1258

SD6RA78

——The flywheel gear ring for vehicle and the one for
independent engine assembly is different and also the starter gear
modulus is different, so different starters need to be applied.
——The left figure indicates SD6RA78.
——The tightening torque for bolt installation is 40±4Nm.

Fig. 121

Fig. 123

Fig. 124

Fig. 122