What Causes the RPM to Not Drop After Releasing the Throttle?
1 Answers
The reason the RPM does not drop after releasing the throttle may be due to the throttle spring being in a compressed state for a long time, resulting in reduced tension, an increased throttle opening, and higher fuel supply, causing the RPM needle to return slowly. It could also be due to faulty components or air leaks in the intake tract. If the engine RPM drops very slowly right after maintenance, this is not considered a fault. More detailed information includes: 1. The engine RPM affects the number of power strokes per unit time or the effective power output of the engine, meaning the effective power varies with RPM. 2. When specifying the effective power of an engine, the corresponding RPM must also be indicated. The effective power and corresponding RPM specified on the engine nameplate are referred to as the rated power and rated RPM, respectively. The operating condition of the engine at rated power and RPM is called the rated condition. Rated power is not the maximum power the engine can produce; it is the maximum usable limit of effective power determined by the engine's intended application. 3. For the same engine model, the rated power value may differ depending on its application. Effective torque also varies with engine conditions. The maximum torque a car engine can output, along with its corresponding RPM, serves as an indicator of the engine's dynamic performance.
