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案例1故障现象一辆奥迪A8 L轿车,搭载3.2FSI发动机,累计行驶了6万km。据驾驶人反映,该车有时会出现加速不良的现象。故障诊断经试车发现急加速时车辆发窜。当车速超过140 km/h时急加速,发动机转速不上升反而下降,若此时松开加速踏板,待车速降到120 km/h时,慢慢踩下加速踏板,可进行加速,但车速不会超过145 km/h。连接VAS5052,没有检测到故障代码。从故障现象分析可能的原因为:排气不畅;
Case 1 breakdown phenomenon An Audi A8 L sedan, equipped with 3.2FSI engine, total travel 60,000 km. According to the driver reflects the car sometimes appear to accelerate the phenomenon of bad. After the test found that the vehicle accelerates the vehicle flew. Accelerate rapidly when the vehicle speed exceeds 140 km / h, and the engine speed does not rise but decrease. If you release the accelerator pedal at this time, slowly depress the accelerator pedal until the vehicle speed drops to 120 km / h, but the speed is not Will exceed 145 km / h. Connection to VAS5052, no fault code detected. Probable causes from the failure phenomenon analysis: poor exhaust;