Device and method for controlling engine
AssigneeMazda Motor Corporation
InventorsTakafumi Nishio, Takahiro Yamamoto, Toshiaki Nishimoto, Masanori Hashimoto
Life of this patent
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Abstract
A controller increases an actual oil pressure up to a transient oil pressure (an actuating oil pressure) and then supplies oil adjusted to have the transient oil pressure (the actuating oil pressure) to valve stopping mechanisms to actuate the valve stopping mechanisms. The controller, when actuating the valve stopping mechanisms, starts increase in an intake filling amount when the actual oil pressure increases up to a predetermined determination value set at the transient oil pressure (the actuating oil pressure) or lower.
Claims11
A device for controlling an engine including a plurality of cylinders and switching between all-cylinder operation, in which all the cylinders are operated, and deactivated cylinder operation, in which some of the cylinders are deactivated, the device comprising:
- a valve stopping mechanism configured to actuate to switch the engine from the all-cylinder operation to the deactivated cylinder operation when oil pressurized up to a predetermined actuating oil pressure is supplied;
- an oil supply device configured to discharge oil to a hydraulic passage connected to the valve stopping mechanism and to adjust an oil pressure of the oil;
- a control valve configured to supply oil from the hydraulic passage to the valve stopping mechanism;
- a filling amount adjusting device configured to adjust an intake filling amount indicating an amount of gas to be supplied to each of the cylinders;
- a controller connected to the oil supply device, the control valve, and the filling amount adjusting device and configured to output a first control signal to the oil supply device, output a third control signal to the control valve, and output a second control signal to the filling amount adjusting device to operate the engine;
- and
- an oil pressure sensor connected to the controller, and configured to detect an oil pressure of oil flowing through the hydraulic passage and to output a signal indicating a detection result to the controller, wherein
- when a condition of switching the engine from the all-cylinder operation to the deactivated cylinder operation is established, the controller is configured to:
- firstly, output the first control signal to the oil supply device to increase the oil pressure detected by the oil pressure sensor up to the actuating oil pressure while maintaining the intake filling amount in the all-cylinder operation,
- secondly, output the second control signal to the filling amount adjusting device to increase the intake filling amount compared with that at a start time of raising the oil pressure while maintaining the oil pressure at the actuating oil pressure after the oil pressure detected by the oil pressure sensor increases up to a predetermined determination value set at the actuating oil pressure or lower, and
- thirdly, actuate the valve stopping mechanism by outputting the third control signal to the control valve to supply the oil adjusted to the actuating oil pressure to the valve stopping mechanism after completion of the increase in the intake filling amount.
A method of controlling, via a device, an engine including a plurality of cylinders and switching between all-cylinder operation, in which all the cylinders are operated, and deactivated cylinder operation, in which some of the cylinders are deactivated,
- the device including:
- a valve stopping mechanism configured to actuate to switch the engine from the all-cylinder operation to the deactivated cylinder operation when oil pressurized up to a predetermined actuating oil pressure is supplied;
- an oil supply device configured to discharge oil to a hydraulic passage connected to the valve stopping mechanism and to adjust an oil pressure of the oil;
- a control valve configured to supply oil from the hydraulic passage to the valve stopping mechanism;
- a filling amount adjusting device configured to adjust an intake filling amount indicating an amount of gas to be supplied to each of the cylinders;
- a controller connected to the oil supply device, the control valve, and the filling amount adjusting device and configured to output a first control signal to the oil supply device, output a third control signal to the control valve, and output a second control signal to the filling amount adjusting device to operate the engine;
- and
- an oil pressure sensor connected to the controller, and configured to detect an oil pressure of oil flowing through the hydraulic passage and to output a signal indicating a detection result to the controller,
- the method comprising:
- firstly, outputting the first control signal to the oil supply device to increase the oil pressure detected by the oil pressure sensor up to the actuating oil pressure while maintaining the intake filling amount in the all-cylinder operation;
- secondly, outputting the second control signal to the filling amount adjusting device to increase the intake filling amount compared with that at a start time of raising the oil pressure while maintaining the oil pressure at the actuating oil pressure after the oil pressure detected by the oil pressure sensor increases up to a predetermined determination value set at the actuating oil pressure or lower;
- and
- thirdly, actuating the valve stopping mechanism by outputting the third control signal to the control valve to supply the oil adjusted to have the actuating oil pressure to the valve stopping mechanism after completion of the increase in the intake filling amount.
Dependencies are inferred from the claim text.