Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 03, 2023 - September 06, 2023
A discrete model of the combustion process for controlling an HCCI engine is developed, and its prediction accuracy of crank angle, pressure and temperature is evaluated. The combustion process is discretized at several points based on the mass burning rate. The model is designed to calculate the state in the cylinder at each point by a formula that follows the physics laws as much as possible. As a result, the complex heat release and pressure history of the combustion process of an HCCI engine can be predicted with some accuracy and a light computational load without using a complete statistical equation such as the Wiebe function. But the prediction accuracy of the entire model is still not good and needs to be improved in some parts. In particular, the changes in the cylinder condition immediately after ignition are not well predicted. The model immediately after ignition needs to be re-examined.
