摘要:
An exhaust gas recirculation system includes a housing, first and second valves, an actuator, a cam member coupled with the first valve to be in synchronization therewith and receiving power of the actuator to rotate, and a link member coupled with the second valve to be in synchronization therewith and receiving power of the actuator through the cam member to rotate. The cam member includes a cam groove, an open end part formed on one end side of the groove in its formation direction and opening outward of the cam member, and an overlapping part overlapping with the actuator. The link member is driven to rotate along the groove in synchronization with rotation of the cam member. The link member includes a roller guided along the groove.
摘要:
When a failure occurs in synchronizing mechanism, an intake air throttle valve is rotated in a direction that is opposite from a normal operational time valve closing direction, so that an arm of a driven plate contacts a throttle valve side stopper to stop rotation of the intake air throttle valve. Thereafter, when a low pressure EGR valve is rotated from a full close position to a full open position, an EGR valve side stopper contacts the arm of the driven plate to stop the low pressure EGR valve. A rotational angle of the EGR valve is sensed with a sensor and is outputted to an ECU. The ECU determines that a failure mode is set when a valve angle sensed with the sensor coincides with a rotation stop position of the EGR valve.
摘要:
A low pressure EGR regulating valve is driven by an electric actuator, and an output of the electric actuator is transmitted to an intake air throttle valve through a link device. An ECU executes a failure determination to determine presence of a failure in a case where a sensed opening degree, which is sensed with a low pressure EGR opening degree sensor, is other than an opening degree that corresponds to a maximum opening degree of the throttle valve limited by a mechanical stopper. The ECU executes the failure determination after the energization of the electric actuator is stopped in response to stopping of the engine.
摘要:
A low pressure EGR regulating valve is driven by an electric actuator, and an output of the electric actuator is transmitted to an intake air throttle valve through a link device. An ECU executes a failure determination to determine presence of a failure in a case where a sensed opening degree, which is sensed with a low pressure EGR opening degree sensor, is other than an opening degree that corresponds to a maximum opening degree of the throttle valve limited by a mechanical stopper. The ECU executes the failure determination after the energization of the electric actuator is stopped in response to stopping of the engine.
摘要:
The present invention is provided for maintaining and replacing storage devices systematically in accordance with schedule. A storage control apparatus 1 has multiple storage devices 1A equipped with flash memory or the like. The storage control apparatus 1 monitors and records the utilization state of each storage device. When a storage device utilization state reaches a first threshold, the storage control apparatus starts an access control process to control the length of a maintenance period. When the storage device utilization state reaches a second threshold, the storage control apparatus executes blockage control, thereby causing this storage device to be replaced. The timing, at which a storage device with little lifetime remaining is replaced, is controlled to enhance maintenance work efficiency.
摘要:
A throttle control apparatus includes a valve. A motor is provided for generating driving force to rotate the valve. Gears transmit the driving force to the valve. A biasing unit generates biasing force to bias the valve in a close rotative direction. A control unit is provided for supplying electricity to the motor to generate the driving force. When the control unit terminates electricity supply to the motor, the valve is biased to a full close position by the biasing force. When the control unit performs a full close control to manipulate the valve toward the full close position, the control unit continues electricity supply to the motor to stop the valve at a full close control point, which is set in advance of the full close position.
摘要:
When a valve body is rotated toward a full-close position in a valve-close mode, a control portion controls an electric motor so that the rotating speed of the valve body is lower than that in a valve-open mode. A rotating speed of the valve body around the shaft in the valve-close mode is lower than that in the valve-open mode. Thus, when the seal ring is brought into contact with the inner wall surface, an impact generated therebetween can be moderated. While the valve body is rotated toward the full-close position, a seal ring is gradually elastically deformed. A sliding friction between the seal ring and the inner wall surface can be reduced.
摘要:
When a control unit variably controls an electric power supplied to an electric motor to repeat a valve opening and closing movement of a valve between a first intermediate position and a second intermediate position through a neutral position, the control unit initially sets the neutral position as a control target value until a valve position, which is sensed with a valve opening degree sensor, is located immediately before the neutral position. The control unit thereafter changes the control target value to the first intermediate position or the second intermediate position when the control unit determines that the valve position, which is sensed with the valve opening degree sensor, reaches the neutral position.
摘要:
When a control unit variably controls an electric power supplied to an electric motor to repeat a valve opening and closing movement of a valve between a first intermediate position and a second intermediate position through a neutral position, the control unit initially sets the neutral position as a control target value until a valve position, which is sensed with a valve opening degree sensor, is located immediately before the neutral position. The control unit thereafter changes the control target value to the first intermediate position or the second intermediate position when the control unit determines that the valve position, which is sensed with the valve opening degree sensor, reaches the neutral position.
摘要:
A throttle control apparatus includes a housing defining therein a fluid passage. A motor is provided for generating driving force to rotate a valve. The valve blocks the fluid passage when the valve is in a full close position. A throttle position detecting unit detects a throttle position of the valve. A control unit is adapted to performing a full close control to manipulate the valve toward a control target by setting the control target at a throttle position deviating from the full close position in a close rotative direction. The control unit starts a deceleration control to reduce moving speed of the valve gradually toward the control target in the full close control when the throttle position is a specific position in the vicinity of the full close position.