The system is a semi-closed loop system that knocksensor was used.
由于采用外部的爆震传感器，整个系统成为一个半闭环系统；
2
The technology of engine electronic control and diagnosis, which is different from the control method by using O2 sensor and knocksensor, is studied as well.
提出了一种不同于目前应用的氧传感器和爆震传感器所进行的新型发动机电控技术和诊断技术。
3
The structure of the new designed sensor is very compact, the cost is relatively low and it is small to take up the space. Its signal does not need to amplify while measuring the signal of knock.