捷达车部分常见问题和技术解释(国外英文资料).doc

捷达车部分常见问题和技术解释(国外英文资料) The air flowmeter segment = , the air flowmeter in my car was broken recently, just changed one. The 5v car USES a hot film air quality flow sensor to detect air volume (HFM5). Principle is to maintain a certain temperature for thermal film, the film has a strong cooling effect due to air to heat, keeping constant temperature thermal membrane current is different, and reaction of different air flow. Because of the different atmospheric temperature, the temperature sensor is compensated. The advantage of hot film flowmeter is that it can be used to recognize the flow of air, and to eliminate the influence of the air intake pulse on the measurement, which can be measured more accurately than the intake pressure sensor. But because of the active maintenance of temperature, the internal power component and sensor elements are easily damaged. Operator section after the failure of my car air flow meter speed extremely sensitive, the early days of the performance of the corresponding very quickly, more noticeable than normal, after the fuel consumption increased significantly, the fuel consumption more than 1.5 km - 2 litres, then start to accelerate, 2, 3, come on with a foot on empty feeling, idle speed turn phenomenon obviously, similar throttle spoils, observed after each receiving or pick file tachometer has low idle speed rebound phenomenon. Clean the throttle and the new match can be answered briefly. segment character is checked by V.A.G 1552, no failure code, the air flowmeter reading is 3.8, and the requirement is between 2 and 5, more than 5 needs to be replaced, it is normal range. Continue to read other numerical, found that the oxygen sensor to adjust value exceeds bid, the standard value should be within plus or minus 10% adjustment, and my car idle for + 10.8%, and often change between 11% ~ 17%. Because the oxygen sensor is new, the probability of failure is small, and after consulting Tony_Du, the flowmeter will be replaced fi