Patent Number: 6,305,351

Title: Engine control unit for gaseous injection engine

Abstract: An engine control unit and method of controlling the operation of a gas fuelled internal combustion engine of the kind having a gas injector for injecting gaseous fuel into each cylinder and an inlet manifold through which air flows into each cylinder of the engine, the inlet manifold having a manifold valve to control the flow of air into the inlet manifold. An improved control strategy employed by the engine control unit involves closed loop control of airflow through the inlet manifold of the engine. Manifold absolute pressure (MAP) (70) and manifold air temperature (MAT) (72) are employed to calculate air density (84) which is representative of the mass of air flowing through the inlet manifold (28). The detected air density (84) is compared to a desired air density (DAD) (86) and an air density correction (88) is calculated to adjust the manifold valve position (MVP) (90).

Inventors: Neumann; Barry R. (Herdsman, AU), Wright; William K. (Herdsman, AU), Nelson; Daniel (Herdsman, AU)

Assignee: Orix Vehicle Technology Pty Ltd

International Classification: F02D 19/02 (20060101); F02D 41/00 (20060101); F02D 19/00 (20060101); F02D 43/00 (20060101); F02D 009/02 (); F02D 019/02 ()

Expiration Date: 10/23/2018