What is the appropriate RPM when starting a car?
1 Answers
For new car startup RPM, different models have different idle values due to varying engines. Generally, the idle value ranges between 500 to 850 RPM, while the instantaneous idle speed during cold starts is around 1500 to 2000 RPM. Once the engine coolant temperature returns to 90 degrees, the idle speed will stabilize within the specified range. Additional information: 1. During cold starts, the car requires higher RPM to quickly bring the engine to normal operating conditions. The vehicle's computer automatically adjusts the RPM to achieve optimal operating conditions, operating this way regardless of whether it's winter or summer. When starting the vehicle, if the engine temperature does not meet the programmed standard, the computer will increase the RPM. This is also known as cold start acceleration. 2. In reality, the resistance during startup varies depending on the engine's technical condition, leading to different startup RPMs. For example, a new engine that hasn't been properly broken in will have tighter fits between moving parts, resulting in greater startup resistance and correspondingly lower startup RPM. An engine that has been well broken in and maintained will have moving parts that fit together optimally, leading to slightly higher startup RPM.
