WIT Electronic Fuel System Co.,Ltd.has developed a new fuel injector,the Electronic In-line Pump(EIP) system,designed to meet China's diesel engine emission and fuel economy regulations.It can be used on marine di...WIT Electronic Fuel System Co.,Ltd.has developed a new fuel injector,the Electronic In-line Pump(EIP) system,designed to meet China's diesel engine emission and fuel economy regulations.It can be used on marine diesel engines and commercial vehicle engines through different EIP systems.A numerical model of the EIP system was built in the AMESim environment for the purpose of creating a design tool for engine application and system optimization.The model was used to predict key injection characteristics under different operating conditions,such as injection pressure,injection rate,and injection duration.To validate these predictions,experimental tests were conducted under the conditions that were modeled.The results were quite encouraging and in agreement with model predictions.Additional experiments were conducted to study the injection characteristics of the EIP system.These results show that injection pressure and injection quantity are insensitive to injection timing variations,this is due to the design of the constant velocity cam profile.Finally,injection quantity and pressure vs.pulse width at different cam speeds are presented,an important injection characteristic for EIP system calibration.展开更多
The consideration of bootload is absolutely necessarily in the design of DSP systems. By designing a minimum system us-ing TMS320VC5502 and flash memory, this article designs an integrated scheme of its parallel bootl...The consideration of bootload is absolutely necessarily in the design of DSP systems. By designing a minimum system us-ing TMS320VC5502 and flash memory, this article designs an integrated scheme of its parallel bootload method. In addition, the ISP (In System Programming) technology for flash memory and the method of creating a boot table is discussed. Finally, application codes are successfully loaded from outer flash into internal RAM on the system, and the off-line execution is implemented.展开更多
文摘WIT Electronic Fuel System Co.,Ltd.has developed a new fuel injector,the Electronic In-line Pump(EIP) system,designed to meet China's diesel engine emission and fuel economy regulations.It can be used on marine diesel engines and commercial vehicle engines through different EIP systems.A numerical model of the EIP system was built in the AMESim environment for the purpose of creating a design tool for engine application and system optimization.The model was used to predict key injection characteristics under different operating conditions,such as injection pressure,injection rate,and injection duration.To validate these predictions,experimental tests were conducted under the conditions that were modeled.The results were quite encouraging and in agreement with model predictions.Additional experiments were conducted to study the injection characteristics of the EIP system.These results show that injection pressure and injection quantity are insensitive to injection timing variations,this is due to the design of the constant velocity cam profile.Finally,injection quantity and pressure vs.pulse width at different cam speeds are presented,an important injection characteristic for EIP system calibration.
基金Project of the National NaturalScience Foundation of China( 60572106)
文摘The consideration of bootload is absolutely necessarily in the design of DSP systems. By designing a minimum system us-ing TMS320VC5502 and flash memory, this article designs an integrated scheme of its parallel bootload method. In addition, the ISP (In System Programming) technology for flash memory and the method of creating a boot table is discussed. Finally, application codes are successfully loaded from outer flash into internal RAM on the system, and the off-line execution is implemented.
