초록 ▼

A method of calibrating a variable valve actuation system is provided. An engine valve is moved from a first position where the engine valve blocks a flow of fluid to a second position where the engine valve passes a flow of fluid. A valve actuator is actuated to prevent the engine valve from return

A method of calibrating a variable valve actuation system is provided. An engine valve is moved from a first position where the engine valve blocks a flow of fluid to a second position where the engine valve passes a flow of fluid. A valve actuator is actuated to prevent the engine valve from returning to the first position. A signal is transmitted to cause the valve actuator and to allow the engine valve to return to the first position. The return of the engine valve to the first position is determined. A time parameter indicative of an elapsed time between the transmission of the signal and movement of the engine valve to the first position is determined.

대표청구항 ▼

A method of calibrating a variable valve actuation system is provided. An engine valve is moved from a first position where the engine valve blocks a flow of fluid to a second position where the engine valve passes a flow of fluid. A valve actuator is actuated to prevent the engine valve from return

A method of calibrating a variable valve actuation system is provided. An engine valve is moved from a first position where the engine valve blocks a flow of fluid to a second position where the engine valve passes a flow of fluid. A valve actuator is actuated to prevent the engine valve from returning to the first position. A signal is transmitted to cause the valve actuator and to allow the engine valve to return to the first position. The return of the engine valve to the first position is determined. A time parameter indicative of an elapsed time between the transmission of the signal and movement of the engine valve to the first position is determined. r actuator. 7. A linear actuator apparatus that linearly reciprocate a load, comprising: a first linear actuator including a first mover capable of linearly reciprocating in a first direction and a second direction, the first mover being connected to the load; a second linear actuator including a second mover capable of linearly reciprocating in the first direction and the second direction, the second mover being equipped with an accumulator; and a connecting unit that connects the first mover and the second mover so as to be able to move relative to each other linearly in the first direction and the second direction, wherein the shift of the first mover is larger than that of the second mover, the accumulator includes a first accumulator having a structure such that it accumulates energy by the shift of the second mover in the first direction due to the operation of the second linear actuator, and shifts the second mover in the second direction by discharging the energy accumulated by the operation of the second linear actuator; and a second accumulator having a structure such that it accumulates energy by the shift of the second mover in the second direction due to the operation of the second linear actuator, and shifts the second mover in the first direction by discharging the energy accumulated by the operation of the second linear actuator, and the first mover and the second mover respectively include a first abutting surface that abuts against each other when the second mover shifts in the second direction due to the discharge of energy by the first accumulator, to transmit the energy discharged from the first accumulator to the load; and a second abutting surface that abuts against each other when the second mover shifts in the first direction due to the discharge of energy by the second accumulator, to transmit the energy discharged from the second accumulator to the load. 8. The linear actuator apparatus according to claim 7, wherein the second linear actuator comprises a first solenoid that allows the second mover to shift in the second direction and to be held in the shifted position, upon magnetization, and releases the held state of the second mover, upon demagnetization, and a second solenoid that allows the second mover to shift in the first direction and to be held in the shifted position, upon magnetization, and releases the held state of the second mover, upon demagnetization, and the first accumulator comprises a first spring that accumulates energy by compression due to the shift of the second mover in the second direction, and shifts the second mover in the first direction by discharging the energy by expansion, and the second accumulator comprises a second spring that accumulates energy by compression due to the shift of the second mover in the first direction, and shifts the second mover in the second direction by discharging the energy by expansion. 9. The linear actuator apparatus according to claim 7, wherein the first linear actuator comprises: an actuating unit including a magnetic path member comprising a magnetic flux generator equipped with an electromagnetic coil by winding to generate a magnetic flux, and a magnetic field forming section having at least two pole shoes to form at least one magnetic field region by distributing the magnetic flux; a magnetizing member fitted to the first mover and having two magnetized surfaces having a different polarity from each other; and an electric current supply unit that supplies a driving current having a magnetism corresponding to the movement of the first mover in either the first direction or the second direction, to the electromagnetic coil. 10. The linear actuator apparatus according to claim 7, wherein the load is an inlet valve, an exhaust valve, or a fuel injection valve of an engine. 11. The linear actuator apparatus according to claim 7, wherein at the time of startup, when the second linear actuator is actuated t