fuel pressure GREAT WALL HOVER 2006 Service Repair Manual

Engine
For the structure and main technical parameter of engine see Table 2.
Table 2 Structure and main technical parameter of engine

Serial No. Item Specification and parameter
1 model 4G64S4M
2 style 4-cylinder, straight-line, water-cooling, single top
cam shaft, 4-stroke engine
3 Fuel oil supply method Multi-point fuel oil injection(MPI)
4 Measuring method of inlet capacity Speed compact style
5 Combustion room style Single-slope roof
6 Cylinder diameter × stroke(mm) 86.5×100
7 Total displacement (L) 2.351
8 Compression ratio 9.5:1
9 Max. power and corresponding speed (kW/r/min) 93/5250
10 Max. torque and corresponding speed (N·m/rpm) 190/2500
11 Min. fuel consumption (g/kW·h) ≤254
12 Idle stable speed(r/min) 750±30
13 Idle-speed control Electronic closed loop control
14 Mean piston speed(m/s) 17.5
15 Mean effective pressure (kPa) 1036
1 6 C y l i n d e r c o m p r e s s i o n p r e s s u r e : i n 250r/min (kPa) 1 3 2 0
17 Ignition sequence and control 1-3-4-2; without distributor block, electronic
controlled direct ignition
18 Spark plug gap(mm) 1.0～1.1
19 Spark plug model BKR5E-11 or K16PR-U11 or RC10YC4
BKR6E-11 or K20PR-U11 or RC8
20 Manufacturer of spark plug NGK or DENSO or Xiang huo ju
21 Valve clearance(mm) 0(hydraulic column )
22 Port timing: Opened inlet/closed inlet
Opened outlet/closed outlet 18 °before upper stop point/ 53 °after lower stop
point
50°before lower stop point/ 18 °after upper stop
point
23 Lubrication method Combined method of pressure and splash
24 Pressure of engine oil of main oil channel, in idle
speed of 3000rpm (kPa) (≥78.5)/(245-490)
25 Max. engine oil temperature(℃) 130
26 Consumption ratio of engine oil(g/kW·h) 2

Caution: When maintaining the fuel supply system, if the oil
path needs to be removed, the pressure of the fuel system must
be released to avoid the ejection of high pressure fuel.
Disassembly of the fuel tank
1. First remove the oil-in and oil return hard tube of the
generator, the oil return hard tube of fuel tank, and the
connection rubber tube between the back parts of hard vaporizer
tube. Release the pressure of oil path system slowly, block the
joints with cotton cloth, lest there is ejection of high pressure
oil.
2. Remove the oil filling port at the back of the fuel tank and the
clip of the connection rubber tube of ventilation tube, there are
two clips altogether.
3. Remove the bolts fixing the fuel tank, there are 6 bolts
altogether;
4. Remove the oil-in and oil-out tube from the fuel tank, remove
the vaporizer tube joints and line bundle connector;

Automatic transmission-2
Instruction for automatic transmission
1. M88 4-speed automatic transmission is equipped with the hydraulic torque converter and electric control system with locking.
When keep the stable forward status, the hydraulic torque converter can be locked automatically when the engine operates in low
speed, then reduce the unnecessary slide.
Figure 1.1 Electric automatic transmission control system
Figure 1.2 M88 4 speeds automatic transmission appearance figure (applied to 2 wheels driving)
2. The main advantage of the transmission is the application of transmission control unit (TCU). The control unit is the control
system based on the microprocessor system.. TCU control the shifting sensing and realize the Gear position shifting through the
signal of opening degree of throttle position, opening frequency of throttle position, engine speed, vehicle speed, transmission oil
temperature, gear position, mode selection and forced Gear reduction application.
3. TCU drives a variable pressure regulating solenoid valve to control three regulation valves and control the feeling of shifting.
Different transmission fluid temperatures are taken as one the main parameters to control the output pressure of the solenoid
valve, so as to keep consistent feeling of shifting within the normal operation scope.
4. The planning of shifting is very flexible. According to the car model, the different shifting plan is stored in the same TCU.
Generally speaking, the “economical mode” can increase the economical efficiency of the fuel and the driving performance of the
car to the maximum limit. The “dynamic mode” can bring into full play the drive performance of the car to the maximum limit. The
“winter mode” can make the car starting from shift 2.