Controller of variable valve apparatus of internal combustion engine and variable valve system of internal combustion engine
AssigneeHitachi Automotive Systems, Ltd.
InventorsShinichi KAWADA, Naoki KOKUBO
Life of this patent
Estimating the term…
Abstract
A controller of a variable valve apparatus of an internal combustion engine has an engine start indication detecting circuit that detects an indication of an engine start. When the indication of the engine start is detected by the engine start indication detecting circuit in a state in which temperature of the engine is lower than a predetermined temperature, an electric motor provided in the variable valve apparatus is supplied with a current, and this current supply to the electric motor is maintained for a predetermined time from a time point of the detection of the indication of the engine start to an engine cranking start.
Claims20
A controller of a variable valve apparatus of an internal combustion engine, the variable valve apparatus having an output member that is operated according to a power transmitted from an electric motor through a speed reduction mechanism adjacent to the electric motor and changing opening and closing timing of an engine valve according to the operation of the output member, the speed reduction mechanism being supplied with lubricating oil, the controller comprising:
- an engine start indication detecting circuit that detects an indication of an engine start, and
- when the indication of the engine start is detected by the engine start indication detecting circuit in a state in which temperature of the engine is lower than a predetermined temperature, the electric motor being supplied with a current, and the current supply to the electric motor being maintained for a predetermined time from a time point of the detection of the indication of the engine start to an engine cranking start.
A controller of an electric motor used for a variable valve apparatus of an internal combustion engine, the variable valve apparatus having an output member that is operated according to a power transmitted from the electric motor through a speed reduction mechanism adjacent to the electric motor and changing opening and closing timing of an engine valve according to the operation of the output member, the speed reduction mechanism being supplied with lubricating oil, the controller comprising:
- an engine start indication detecting circuit that detects an indication of an engine start, and
- when the indication of the engine start is detected by the engine start indication detecting circuit in a state in which temperature of the engine is lower than a predetermined temperature, the electric motor being supplied with a current, and the current supply to the electric motor being maintained at least for a predetermined time from a time point of the detection of the indication of the engine start to an engine cranking start with the operation of the output member restrained.
A variable valve system of an internal combustion engine, comprising:
- a variable valve apparatus having
- (a) an electric motor;
- (b) a speed reduction mechanism disposed adjacent to the electric motor and supplied with lubricating oil;
- and
- (c) an output member operated according to a power transmitted from the electric motor through the speed reduction mechanism, and
- the variable valve apparatus changing opening and closing timing of an engine valve according to the operation of the output member;
- a temperature detecting unit which detects an engine temperature;
- an engine start indication detecting unit which detects an indication of an engine start;
- and
- a controller for controlling the electric motor, which when a temperature detected by the temperature detecting unit is lower than a predetermined temperature, supplies a current to the electric motor and maintains the current supply to the electric motor for a predetermined time from a time point when the indication of the engine start is detected by the engine start indication detecting unit to a time point when a normal control is started so that in a state in which the output member is restrained to one side of an operation range of the output member, the output member is operated in a restraining direction.
Dependencies are inferred from the claim text.