A calculation method of the fuel injection law for a low-speed high pressure common rail (HPCR) diesel engine

作者：Wang Zheng; Yang Jianguo^*; Fang Wenchao

来源：Journal of Harbin Engineering University, 2011, 32(11): 1468-1473.

DOI：10.3969/j.issn.1006-7043.2011.11.013

• Calculation methods
• Characteristic curve
• Common rail
• Connection points
• Cylinder pressures
• Engineering systems
• Fuel pipes
• Fuel quantity
• High pressure
• High pressure common rail
• HIL simulations
• HPCR
• In-line
• Injection law
• Injection pressures
• Injection rates
• Leaked fuel
• Marine Diesel Engines
• Modeling environments
• Needle lift
• Pressure curve
• System hardware
• Test platforms
• Working conditions

So far there is no instrument that can directly measure the injection law in high pressure and large fuel quantity situations during the injection of a large marine high pressure common-rail (HPCR) low-speed diesel engine. A new method was presented in this paper, which calculates the fuel injection law with an injector model and measures injection pressure and cylinder pressure. A model of the multi-hole injector for an RT-Flex60C marine diesel engine was built using the computation software-advanced modeling environment for simulation of engineering systems (AMESim). The pressure curves at the high-pressure fuel pipe outlet connection point with the injector were measured on the RT-Flex60C large diesel engine HPCR system hardware in the loop (HIL) test platform under different load working conditions. Characteristic curves such as the needle lift, injection rate, rate and pressure of each hole';s injection, and fuel quantity injected and leaked during 180 seconds were calculated with the pressure curves by the model. The calculated needle lift curves are consistent with those measured on the test platform, and the injected and leaked fuel quantity during the 180 second period is in line with the data measured on the real engine.

• 出版日期2011
• 单位武汉理工大学