CONTROL SYSTEM FOR MULTIFUEL INTERNAL COMBUSTION ENGINE

摘要

The present invention addresses the problem of controlling deviation between the generated torque and the requested torque of an engine in a control system for a multifuel internal combustion engine capable of using CNG and liquid fuel. To solve this problem in a control system for a multifuel internal combustion engine wherein the internal combustion engine is operated in a first operating mode that uses only CNG when the requested torque of the internal combustion engine is equal to or less than a threshold value and the internal combustion engine is operated in a second operating mode that uses at least the liquid fuel of the CNG and the liquid fuel when the requested torque is greater than the threshold value the present invention changes the threshold value in accordance with the concentration of inert gas contained in the CNG.