What is the idle air flow rate of a car?
1 Answers
The idle air flow rate of a car is approximately 2.5g/s. Below are the detailed explanations regarding the idle air flow rate of a car: 1. Data Statistics: Under normal conditions, the air flow signal data during idle is around 2.5g/s; if it is less than 2.0g/s, it indicates an air leak in the intake system; if it exceeds 4.0g/s, it means the engine is under additional load. The normal air flow value varies for each engine model, with larger displacement engines having higher air flow values. 2. Fault Causes: Since the air flow sensor signal is the primary basis for controlling the air-fuel ratio, an infrared exhaust gas analyzer can be used to measure the exhaust gas composition during engine idle and stable operation at 2000r/min. If the measured values deviate significantly from the standard values, it indicates a fault caused by poor performance of the air flow sensor.