Technical Paper
Simulation Analysis on Dynamic Characteristics of Diesel Fuel Injection Systems
1985-11-01
851586
The dynamic characteristics of a diesel fuel injection system have a remarkable affect on the cyclic fluctuation of engine speed which is called “hunting”. The simulation analysis on these characteristics are discussed in this paper. First, we conducted experiments on frequency response of mechanical governors on the test stand. However, we could not establish good correlation between the experimental results and the calculations using the “linear governor equation” method. We investigated the results in detail, and by using a non-linear governor equation - “Itoh's equation”, we could simulate the dynamic characteristics of the governor quite well. However, after Itoh's equation was used in the “hunting” simulation, we still could not get good correlation between the experimental results and the calculation of “hunting”. Next, we have investigated the inditial response of fuel delivery characteristic.