Haval H5 has always been lukewarm on market, but one day I went to see car with my friend, he told me that he would buy H5 if he wanted to buy Haval, and choose diesel version. , cars many know Everyone will consider diesel version.
Diesel cars are economical and powerful. Many SUVs and race cars use diesel fuel. Although not many people use diesel cars in my country, friends who know Europe should know that proportion of diesel cars in Europe is very high. higher attitude towards gasoline cars. However, domestic diesel engines face problems such as maintenance problems and few spare parts, as well as high noise levels. In fact, most people who understand cars do not pay attention to these problems.
Haval All Wheel Drive Electronically Controlled Transfer Case Electronic Transfer Case Control Part 1 Electronic Transfer Case Shift Principle Shift between 4H and 4H at will without stopping vehicle or depressing clutch. When electronically controlled transfer case control unit (TCU) receives a 4H shift command (controlled by a rotary switch), ECU controls electromagnetic clutch inside transfer case to synchronize engagement sleeve with clutch coil housing and then shift. stop sleeve, gear sleeve and clutch coil housing, thereby connecting drive sprocket to rear output shaft, and power is transmitted to driven sprocket through chain, thereby driving front output shaft into rotation and output torque to realize conversion between 2H and 4H transmissions. When shifting between 4H and 4L, driver must stop vehicle and depress clutch. The TCU controls rotation of shift motor according to vehicle speed signal and clutch pedal switch signal, and also drives gear hub through deceleration. switch fork to realize 4H and 4L Switching between 4L. The transfer case realizes 4L gear through single row planetary gear, when gear hub connects input shaft and rear output shaft, it forms a 4H(2H) gear, when gear fork drives gear hub to make rear output shaft and planetary gear. When connecting rail, a 4L file is formed. During shift between 4H and 4L, stop and clutch condition must be maintained for at least 5 seconds to allow shift motor to complete operation.
The case I want to share with you today has to do with an all wheel drive electromagnetic clutch. Recently, a Harvard H5 car has entered store,
The owner of car reported that car is noisy and 4WD mode does not work well. The master got car, lifted car and turned right front wheel and found that there was a lot of noise. The repairman suspected that noise was caused by a ball joint falling apart inside car. After talking with owner, he sent axle shaft, and owner took car to repair shop. The repairman proceeded to disassemble, having previously removed transmission shaft
It turns out that problem is not only in cardan shaft. The mechanic found that tubular front-wheel differential and electromagnetic clutch were badly rusted and worn (the front differential was not serviced and did not change in time), hence noise.
This part is worn to point where it needs to be replaced. The repairman contacted owner. The owner rushed to repair shop and asked for new parts. After new parts arrived, master installed them and went out to test car
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During test, abnormal noise disappeared, but there were problems with car's four-wheel drive mode, signal of the front-wheel drive electromagnetic clutch did not match
After reviewing information, service technician recoded and matched electromagnetic clutch and went for a test drive again. This time, 4WD malfunction was fixed and owner was notified to move after problem was fixed. fixed (this malfunction arose mainly due to fact that front axle differential was not serviced on time. Change oil in the gearbox in a timely manner and there will be no such breakdowns)