State-Based Diesel Fueling For Improved Transient Response In Dual-Fuel Engine

摘要

A method, used with dual-fuel engine, of controlling the amount of diesel fuel delivered to the engine. The method compensates for the poor transient response of gaseous fueling. A controller receives a signal from the operator of the engine representing a desired torque, and based on this signal, determines a desired intake manifold state. It generates commands to various actuators to control the intake air and the intake gaseous fuel such that the desired intake manifold state will occur. The controller also receives sensor data from which the current in-cylinder state can be measured or estimated. It determines a current amount of diesel fuel based on the desired torque, the engine speed and the current in-cylinder state, and generates a diesel fueling command.

主权项

1. A method of controlling the amount of diesel fuel delivered to a dual-fuel internal combustion engine, the engine being fueled with both gaseous fuel and diesel fuel, comprising:
receiving a signal from the operator of the engine representing a desired torque; determining a desired intake manifold state based on the desired torque; controlling flow actuators for at least the intake air flow and the intake gaseous fuel such that the desired intake manifold state will occur; receiving sensor data from which the engine speed and a current in-cylinder state can be measured or estimated; wherein the current in-cylinder state comprises at least an in-cylinder amount of gaseous fuel; determining a current amount of diesel fuel based at least on the desired torque, the engine speed and the current in-cylinder state; and generating a diesel fueling command representing the current amount of diesel fuel.