초록 ▼

A valve operation mode changing system for the intake or exhaust valves of an internal combustion engine is controlled in response to engine speed and temperature of the working oil utilized in the system in such a way as to permit the valve operating mode to be changed from a low-speed to a high-sp

A valve operation mode changing system for the intake or exhaust valves of an internal combustion engine is controlled in response to engine speed and temperature of the working oil utilized in the system in such a way as to permit the valve operating mode to be changed from a low-speed to a high-speed mode in response to engine speed requirements only when the temperature of the working oil exceeds a predetermined value. The system also provides for terminating fuel supply to the engine when the temperature of the working oil is below a predetermined temperature and the speed of the engine exceeds a predetermined temperature.

대표청구항 ▼

A method for controlling the operating of an internal combustion engine having a cylinder and fuel supply and intake and exhaust valves operatively associated with said cylinder and a hydraulically-operated valve operation mode changing mechanism to vary the mode of operation of such valves between

A method for controlling the operating of an internal combustion engine having a cylinder and fuel supply and intake and exhaust valves operatively associated with said cylinder and a hydraulically-operated valve operation mode changing mechanism to vary the mode of operation of such valves between low speed engine conditions and high speed engine conditions, comprising the steps of: monitoring the speed of said engine; monitoring the temperature of the working oil utilized in said valve operating mode changing mechanism; preventing the valve operating mode changing device to shift the operation of said valves from a low-speed mode to a high-speed mode in response to the detection of a first engine speed when a working oil temperature equal to or less than a predetermined value is also detected; and terminating the supply of fuel to said engine in response to the detection of a second predetermined value of engine speed when a working oil temperature equal to or less than said predetermined value continues to be detected.