Patent application number | Description | Published |
20090005957 | ACTUATOR CONTROL SYSTEM AND ACTUATOR - A control system includes a nonvolatile memory of an electronic controller, which stores information regarding operation characteristics of a hydraulic-pressure control valve that serves as an actuator in advance, and an electronic control unit that controls an operation of the hydraulic-pressure control valve based on the information. The electronic control unit is formed separately from the hydraulic-pressure control valve. The electronic controller is formed integrally with the hydraulic-pressure control valve. The control system and the actuator simplify a work for replacing the electronic control unit or the actuator. | 01-01-2009 |
20090250645 | SOLENOID VALVE - A solenoid valve includes a valve housing in which a spool valve element is fitted to be reciprocably slidable along an axis; a magnet coil that moves the spool valve element in a first direction along the axis by an action of an electromagnetic force; a return spring that biases the spool valve element in a second direction, opposite to the first direction, and moves the spool valve element in the second direction when the magnet coil is not excited; and first and second attraction members that are respectively fixed to the spool valve element and the valve housing such that they are spaced from each other along the axis by a distance no less than a maximum moving amount of the spool valve element and attract each other by an attraction force smaller than a bias force of the return spring when the magnet coil is not excited. | 10-08-2009 |
20110253919 | CONTROL DEVICE FOR VEHICULAR ON/OFF CONTROL VALVE - It is provided a control device for a vehicular on/off control valve used in a hydraulic control circuit of a vehicle for switching an operating state of the on/off control valve between a turn-on state or a turn-off state on electrically-magnetizing or non-electrically-magnetizing a solenoid incorporated in the on/off control valve, the control device being operable to set a current value current-supplied to the solenoid in an operation initiating current value needed for initially switching the on/off control valve from the turn-off state to the turn-on state during an electrically-magnetized state of the solenoid, and in a sustaining current value lower than the operation initiating current value and needed for sustaining the turn-on state after switched to the turn-on state. | 10-20-2011 |
Patent application number | Description | Published |
20090241871 | ASSEMBLED CAMSHAFT AND INTERNAL COMBUSTION ENGINE PROVIDED WITH ASSEMBLED CAMSHAFT - The degree of freedom in a mounting position of a fuel pump driving cam ( | 10-01-2009 |
20110315104 | VARIABLE VALVE TIMING DEVICE FOR INTERNAL COMBUSTION ENGINE AND MANUFACTURING METHOD THEREFOR - A variable valve timing device for an internal combustion engine includes: a variable valve timing mechanism that changes a valve timing; and a phase limiting mechanism that locks a rotational phase between a housing rotor and a vane rotor at an intermediate phase. The phase limiting mechanism engages a first limiting pin with a first engaging groove and engages a second limiting pin with a second engaging groove to lock the housing rotor to the vane rotor. A retard-side side surface of an engaging hole is configured so as to be able to adjust a clearance between the second limiting pin and the retard-side side surface when the first limiting pin is engaged with a first advance end portion. | 12-29-2011 |
20130152887 | CONTROL APPARATUS FOR INTERNAL COMBUSTION ENGINE - An IIS system that performs control related to intermittent stopping of engine operation by idling stop control is applied to an internal combustion engine including a VVT mechanism that makes the valve timing of an engine valve variable and has an intermediate lock mechanism that mechanically locks the valve timing at an intermediate lock position between a most retarded position and a most advanced position. The IIS system is configured to inhibit the engine operation from being intermittently stopped at the occurrence of a failure of the VVT mechanism to avoid the internal combustion engine from being prevented from being restarted after the intermittent stop depending on the occurrence of the failure of the VVT mechanism. | 06-20-2013 |
20130291835 | CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE - When a start-up failure occurs wherein an internal combustion engine equipped with a variable valve device does not transition to complete combustion before a first prescribed period α elapses from the start of cranking in conjunction with fuel injection, a control unit for the internal combustion engine executes a start-up failure process addressing a state wherein the valve timing is different from a specific timing. | 11-07-2013 |
20140048026 | VARIABLE VALVE DEVICE FOR INTERNAL COMBUSTION ENGINE - A variable valve actuation device for an internal combustion engine includes a variable valve timing mechanism and a valve timing restricting mechanism. When the operating state of the variable valve timing mechanism is in the phase restricting state and the operating state of the variable valve timing mechanism is changed to the phase releasing state on the basis of pressing the accelerator pedal, a torque limiting control is then performed to limit an increase in the torque of the internal combustion engine. With this control the rate of increase of the torque is set less than the rate of increase of the torque corresponding to the operation of pressing the accelerator pedal by retarding and correcting the ignition timing. Thus, when the operating state of the variable valve timing mechanism is changed from the phase restricting state to the phase releasing state, thereby reducing discomfort experienced by the driver. | 02-20-2014 |