For the electronic control system of highpressure common rail diesel engine, the drive circuit and drive software to drive the injector and the solenoid valve of fuel metering unit were developed by using the microcontroller of Freescale 32bit chip and the new control chip of mc33pt2000. Compared with the traditional control chip, mc33pt2000 chip could flexibly adjust the drive current, the drive voltage and the drive time in each stage of drive current of solenoid valve through the programming control. The control precision improved, the debugging period shortened, and the flexibility of developing highpressure common rail fuel injection system improved, which made it easy to debug and modify the drive voltage and current in the future. The current response time and energy consumption of injector solenoid valve under different boost voltages were measured by the designed drive circuit and further analyzed.
LI Jiehui
,
LENG Yiling
,
DUAN Chang
. Solenoid Valve Drive Circuit and Underlying Software Development of HighPressure Common Rail Fuel Injection System Based on mc33pt2000[J]. Vehicle Engine, 2019
, 0(4)
: 41
-46
.
DOI: 10.3969/j.issn.1001-2222.2019.04.007
