| |
คำตอบที่ 4
อู่ประเสริฐศรี
Functional tests
Failing or defective Lambda sensors cause problems, for instance high fuel consumption, difficult vehicle handling or failing the exhaust gas test.
Lambda sensors are tested by means of an oscilloscope. Before making the test one must make sure the engine is tuned-up acc. to manufacturer specifications. Then, the engine must warm up to operating temperature as the Lambda sensor will only function properly when it has the correct temperature.
The sensor exit is connected to the oscilloscope by means of the corresponding connection device. The sensor must not be separated from engine control. The engine should run at about 2,000 rpm.
When the Lambda sensor is functioning properly there is a voltage leap between approx. 0.2 and 0.8 volt. The time taken for the increase from 0.2 volt to 0.8 volt (reaction time "lean-rich") should be approx. 300 milliseconds. The reaction time "rich-lean" should also be in the same range.
When the sensor exit is constant or the reaction time too slow, the Lambda sensor must be replaced. The function of the Lambda sensor should be examined at each inspection and prior to passing the car on to the exhaust gas test. A slow sensor increases fuel consumption and therefore must be replaced.
|
|
เรียนถามเกี่ยวกับอ๊อกเจนเซ็นเซอร์ 4 เส้น ของเครื่อง 3S-GE รุ่นคอพลาด
