The results show that stiffness of spring does not affect the injection rate, but the mass of will affect the needle valveclosing response time.
结果表明，电磁阀铁心弹簧刚度对喷油规律没有影响，但其质量影响针阀落座响应时间；
2
Output speed of electric installations on the determination of its opening and closing the valve when the time is not strictly required, should try to use a slower speed.
关于对电动装置输出转速的确定，在阀门对其启闭时间没有严格要求时，应尽量选用较慢的速度。
3
Test results show that the hydraulic valve actuation system can realize continuously variable valve lift and the early intake valveclosing by changing the time of oil pressure release.