Application of circuit simulation in hardware design for Electronic Control Unit of Compressed Natural Gas engine

Based on V-type development method and circuit simulation, an electronic control unit (ECU) of compressed natural gas engine is designed. Circuit simulation is discussed in detail. According to system requirements for Hardware of ECU, ignition drive circuit, signal sampling and processing circuit and power module are simulated in emphases. Based on multi-thread technology, Hardware in loop test system is also designed. This CNG ECU is applied in bench test successfully. Results of hardware in loop test and bench test showed that hardware meets the requirement of CNG control system. Circuit simulation and V-type platform can greatly increase the quality of hardware design, alleviate design labor and shorten design time.