Patent application number | Description | Published |
20080227599 | Automatic transmission control device - In an automatic transmission control device, multiple electromagnetic valves control fluid pressure of working fluid to be applied to multiple friction elements of an automatic transmission device, so that a transmission gear is changed by engaging some of the friction gears and/or disengaging the other of the friction elements. The electromagnetic valve controls its output pressure in such a manner that the output pressure is temporally increased when starting the transmission gear change. A maximum fluid pressure is selected from the output pressures of the multiple electromagnetic valves and is applied to a pressure control valve, which controls a fluid control pressure applied to a capacity varying device for changing a discharge amount of a pump. As a result, the fluid pressure applied to the friction elements can be rapidly increased at proper timings. | 09-18-2008 |
20090093338 | HYDRAULIC CONTROL UNIT - A hydraulic control system of a friction device where fail-safe is required is provided with one oil pressure switch and one pressure changeover valve. The pressure changeover valve is switched by auxiliary oil pressure based on an operation of the oil pressure control valve. When an auxiliary port communicates with an input port and the pressure changeover valve is switched to the filling determination side, the oil pressure switch is turned on and “filling determination” can be carried out. When the auxiliary port is disconnected from the input port, the pressure changeover valve is switched to the fail-safe determination side. The oil pressure switch is supplied with the same driving oil pressure as of the friction device and “fail-safe determination” can be carried out from the on/off state of the oil pressure switch. | 04-09-2009 |
20090160386 | ELECTRIC DRIVE DEVICE CONTROL SYSTEM AND METHOD - An electric drive device control system includes an electric drive device and an electric control unit. The electric control unit stores a control-side correction current for compensating for a current deviation of the electric control unit and a drive-side correction current for compensating for an operation deviation of the electric drive device. The electric control unit updates the drive-side correction current to a new drive-side correction current, which is specific to a new electric drive device, when the electric drive device is replaced with the new electric drive device. The electric control unit also updates the control-side correction current to a new control-side correction current, when the electric control unit is replaced with the new electric control unit. | 06-25-2009 |
20120000309 | RANGE SENSING APPARATUS - A housing slidably guides a slider, which is driven in response to selection of a shift range of an automatic transmission. Upper and lateral sides of a movable range of the slider are covered with the housing. Thereby, application of hydraulic fluid and foreign objects to guide rails is limited to limit malfunction of the slider. Furthermore, even when the hydraulic fluid and foreign objects adhere to the guide rails, the hydraulic fluid and foreign objects can be collected at ends of the movable range of the slider and can be expelled to an outside of the housing through open ends of the housing. | 01-05-2012 |
20130107474 | ELECTRONIC CONTROL UNIT | 05-02-2013 |
20130192929 | OIL-PRESSURE SUPPLY DEVICE - An oil-pressure supply device includes an oil-pressure control portion, a first filtration portion which traps foreign materials in oil before a mechanical pump, a second filtration portion which traps foreign materials in oil before an electric pump, a first branch passage provided between the mechanical pump and the first filtration portion, a second branch passage provided between the electric pump and the second filtration portion, a third branch passage provided between a discharge port of the electric pump and the oil-pressure control portion, a fourth branch passage through which surplus oil is discharged, a switching portion set at a first position where the first branch passage is connected to the third branch passage when the first filtration portion is recovered, or set at a second position where the second branch passage is connected to the fourth branch passage when the second filtration portion is recovered. | 08-01-2013 |
20130228229 | OIL-PRESSURE CONTROL DEVICE AND MANUFACTURING METHOD THEREOF - A coupling plate of a detent lever is assembled to an oil-pressure control device, wherein a transmission casing is a base for an assembling process. A slider of a range sensor coupled to the coupling plate is assembled to the transmission casing via a sensor body. A spool of a manual valve coupled to the coupling plate is assembled to the transmission casing via a valve body fixed to the sensor body. The coupling plate, the slider and the spool are assembled together, wherein the transmission casing is used as the base for the assembling process. It is not necessary to relatively position the slider and the spool to each other during the assembling process for an oil-pressure control device. | 09-05-2013 |
20130255638 | GAS FUEL PRESSURE CONTROL DEVICE - A regulator is provided with a first pressure reducing valve, a second pressure reducing valve, and a load adjusting part. A gas fuel pressure in a fuel tank is reduced to 1.4 MPa from 20 MPa by the first pressure reducing valve, and then reduced to 0.2 to 0.65 MPa by the second pressure reducing valve. In the second pressure reducing valve, the pressure of the gas fuel is reduced to 0.2 to 0.65 MPa from 1.4 MPa, so that the resistive force of a second O-ring for sealing a first middle-pressure chamber and a second pressure chamber can be made smaller. A sliding resistance between a needle and the second O-ring is reduced. An electromagnetic attracting force generated by the load adjusting part can be made smaller. Electricity consumed by the load adjusting part can be reduced and the regulator can be made smaller. | 10-03-2013 |
20140145100 | ELECTROMAGNETIC VALVE DEVICE FOR HIGH-PRESSURE FLUID - A guide portion slidably receiving a movable core is constructed by a large-diameter portion, a middle-diameter portion, a first small-diameter portion, a magnetism blocking portion, and a second small-diameter portion. A ring portion, which has an outer diameter greater than that of a coil assembly provided radially outside of the guide portion, is provided radially outside of the middle-diameter portion. When the guide portion attached with the coil assembly is attached to a support member corresponding to a mating member, the guide portion is attached to the support member by applying a rotational torque of to the ring portion in an axial direction of the guide portion according to a tool without an interference between the tool and the coil assembly. Therefore, an electromagnetic valve device for a gaseous fuel can be readily attached to the support member. | 05-29-2014 |
20140145101 | ELECTROMAGNETIC VALVE DEVICE FOR HIGH-PRESSURE FLUID - A guide portion made of a magnetic material can be filled with a gaseous fuel of high-pressure and is slidably receiving a movable core. The guide portion is constructed by a first small-diameter portion, a second small-diameter portion, and a magnetism blocking portion having a wall thickness less than that of the first small-diameter portion and the second small-diameter portion. When a magnetic circuit is generated by energizing the coil, a magnetic flux passing through the first small-diameter portion passes through the second small-diameter portion via an end face of the movable core and generates a magnetic attractive force inclining with respect to a center axis. Therefore, the movable core is moved to the stator core by the magnetic attractive force adding a magnetic attractive force generated by a magnetic circuit. | 05-29-2014 |
20140158921 | ELECTROMAGNETIC VALVE DEVICE FOR HIGH-PRESSURE FLUID - A guide portion slidably receiving a movable core is constructed by a medium-diameter portion, a first small-diameter portion, and a second small-diameter portion. A magnetism blocking portion is provided between the first small-diameter portion and the second small-diameter portion. A ring portion is provided at a periphery of the medium-diameter portion, and abuts on a yoke. When a coil is energized, a magnetic circuit is generated to pass through the yoke, the medium-diameter portion, the first small-diameter portion, the movable core, and the second small-diameter portion, and to bypass the magnetism blocking portion. In addition, another magnetic circuit passing through the ring portion is also generated. A magnetic attractive force inclining with a center axis of the guide portion is generated between the second small-diameter portion and an end surface according to an expansion magnetic circuit, and the movable core is moved towards the stator core. | 06-12-2014 |
20140166915 | ELECTROMAGNETIC VALVE DEVICE FOR HIGH-PRESSURE FLUID - A movable core sliding in a guide portion includes a small outer-diameter part, a large outer-diameter part, and a protrusion part. When a magnetic circuit is generated by energizing a coil, a magnetic attractive force inclining with respect to a center axis of the guide portion is generated between the guide portion and the movable core, and moves the movable core towards a stator core. Then, a sliding portion, which is provided over the whole periphery of the small outer-diameter part, and the protrusion part of the movable core are abutted on an inner peripheral surface of the guide portion, a clearance is generated between an outer peripheral surface of parts of the movable core except the protrusion part and the inner peripheral surface of the guide portion. Since the valve member can be opened by a small magnetic attractive force, a coil assembly can be made small. | 06-19-2014 |
20140283794 | Pressure control valve for gaseous fuel - A pressure control valve controls a pressure of a gaseous fuel according to an engine operation state. The pressure control valve has a movable valve body, a manifold chamber that communicates with an intake manifold, and a passage that is connected to an injector. An intake manifold pressure from the manifold chamber moves the movable valve body in a valve opening direction and an output pressure from the passage moves the movable valve body in a valve closing direction. In such manner, the pressure control valve changes a magnitude of a differential pressure between the output pressure and the intake manifold pressure according to a magnitude of the intake manifold pressure. | 09-25-2014 |