Abstract: Provided is a linear solenoid valve having at least one notch that opens on an end surface of the land of the spool on the drain chamber side and is formed on an outer peripheral surface of the land. In response to movement of the spool, a state is formed in which the end surface of the land on the drain chamber side is located inside the communication chamber and the output chamber and the drain chamber communicate with each other via the notch and the communication chamber, and a state is formed in which the end surface of the land on the drain chamber side is located inside the output chamber and the output chamber and the drain chamber communicate with each other via the communication chamber.

Abstract: A hydraulic control device that includes a primary pressure control valve that has a first valve element and that regulates the primary pressure by varying a position of the first valve element in accordance with operation of a first electromagnetic actuator; a secondary pressure control valve that has a second valve element and that regulates the secondary pressure by varying a position of the second valve element in accordance with operation of a second electromagnetic actuator; and a fail-safe valve that varies the position of the first valve element such that the primary pressure is reduced when the first electromagnetic actuator and the second electromagnetic actuator become inoperable.

Abstract: Provided is a linear solenoid valve having at least one notch that opens on an end surface of the land of the spool on the drain chamber side and is formed on an outer peripheral surface of the land. In response to movement of the spool, a state is formed in which the end surface of the land on the drain chamber side is located inside the communication chamber and the output chamber and the drain chamber communicate with each other via the notch and the communication chamber, and a state is formed in which the end surface of the land on the drain chamber side is located inside the output chamber and the output chamber and the drain chamber communicate with each other via the communication chamber.

Abstract: A vehicle power transmission device includes: a continuously variable transmission including a primary pulley, a secondary pulley, and a transmission belt wound between the primary pulley and the secondary pulley; a belt running clutch of hydraulic type for transmitting power to the continuously variable transmission; and a hydraulic control circuit controlling the continuously variable transmission and the belt running clutch. The hydraulic control circuit includes a fail-safe valve switching a communication destination of an oil supply passage for supplying a hydraulic fluid to the belt running clutch to one of a first oil passage supplied with a control hydraulic pressure and a second oil passage supplied with a hydraulic pressure higher than the control hydraulic pressure, the fail-safe valve connecting the oil supply passage with the second oil passage when the fail-safe valve is switched to a failure position. The second oil passage is provided with an orifice.

Abstract: A hydraulic control unit of a vehicle drive system including an automatic transmission, and an oil pump device, includes: a first electromagnetic valve; a second electromagnetic valve; first and second oil passages; a third oil passage; a manual valve operated to connect and disconnect the first and third oil passages and a drain oil passage to and from each other, in response to an operation of a manually operated shifting device by a vehicle operator, such that the first oil passage is connected to the third oil passage when the shifting device is placed in a first operating position, while the first oil passage is connected to the drain oil passage when the shifting device is placed in a second operating position; an accumulator connected to the first oil passage; and a check valve provided in the second oil passage.

Abstract: Disclosed is a MIMO system including a transmitter and a receiver, in which an overall BER characteristic is improved. The transmitter (1) maps data, distributed among transmit antennas, onto an IQ plane to generate carrier symbols, and then, applies an inter-polarization interleave processing in a time direction to the carrier symbols between the transmit antennas, to generate OFDM signals. Receiving the OFDM signals, the receiver (2) demodulates the OFDM signals to generate complex baseband signals, and after that, applies a first deinterleave processing in a time direction to the complex baseband signals to generate time deinterleaved data. Further, the receiver (2) applies a MIMO separation processing to the time deinterleaved data to generate a plurality of sets of MIMO separated data and applies a second deinterleave processing between the receive antennas to the plurality of sets of MIMO separated data, so as to generate carrier symbols.

Abstract: A hydraulic control unit of a vehicle drive system including an automatic transmission, and an oil pump device, includes: a first electromagnetic valve; a second electromagnetic valve; first and second oil passages; a third oil passage; a manual valve operated to connect and disconnect the first and third oil passages and a drain oil passage to and from each other, in response to an operation of a manually operated shifting device by a vehicle operator, such that the first oil passage is connected to the third oil passage when the shifting device is placed in a first operating position, while the first oil passage is connected to the drain oil passage when the shifting device is placed in a second operating position; an accumulator connected to the first oil passage; and a check valve provided in the second oil passage.

Abstract: A hydraulic control device that includes a second solenoid valve that is capable of supplying a resisting pressure that maintains the switching valve in the non-reverse state against the reverse range pressure, wherein the switching valve is maintained in the non-reverse state by supplying the resisting pressure from the second solenoid valve while a travel range is switched to at least a reverse range during forward travel.

Abstract: A hydraulic control device where the engagement pressure which is supplied from the first solenoid valve is supplied to the synchronization mechanism in the case where the signal pressure is not supplied to the switching valve, and the engagement pressure which is supplied from the first solenoid valve is supplied to the engagement element and the source pressure is supplied to the synchronization mechanism as the engagement pressure in the case where the signal pressure is supplied to the switching valve.

Abstract: A hydraulic control device includes: a pressure regulation valve that regulates a hydraulic pressure of oil supplied from an oil pump; a discharge oil passage through which the oil discharged from a fluid coupling flows when a lockup clutch is disengaged; a lubrication oil passage that supplies the oil from the discharge oil passage to a location to be lubricated; a return oil passage that returns the oil drained from the pressure regulation valve to a suction port of the oil pump; a connection oil passage that connects the lubrication oil passage and the return oil passage; and a flow direction regulation valve that is provided in the connection oil passage.

Abstract: In the case where an automatic transmission is configured such that the winding diameter of a belt around a primary pulley (41) is larger than the winding diameter of the belt around a secondary pulley (42) when a primary pressure and a secondary pressure are equal to each other, a fail-safe valve (124) varies the position of a first valve element (123p1) of a primary pressure control valve (123P) such that the primary pressure is reduced when a first electromagnetic actuator (SLPs) and a second electromagnetic actuator (SLSs) become inoperable.

Abstract: A hydraulic control device that includes a source pressure generating valve that generates a source pressure; a solenoid valve that can supply the engagement pressure based on the source pressure; and a supply pressure switching valve that can be switched between a first state where the supply pressure switching valve can supply the engagement pressure to the second engagement element and a second state where the supply pressure switching valve can supply the source pressure to the second engagement element, the supply pressure switching valve being in the first state when the solenoid valve is operating normally, and being switched to the second state in case of abnormality in the solenoid valve.

Abstract: A hydraulic control device includes: a pressure regulation valve that regulates a hydraulic pressure of oil supplied from an oil pump; a discharge oil passage through which the oil discharged from a fluid coupling flows when a lockup clutch is disengaged; a lubrication oil passage that supplies the oil from the discharge oil passage to a location to be lubricated; a return oil passage that returns the oil drained from the pressure regulation valve to a suction port of the oil pump; a connection oil passage that connects the lubrication oil passage and the return oil passage; and a flow direction regulation valve that is provided in the connection oil passage.

Abstract: A hydraulic control device for an automatic transmission where the spool is locked at the first position and the switching pressure can regulate the belt holding force of the primary pulley or the secondary pulley without switching a position of the spool when the engagement pressure is supplied to the second working oil chamber, and the spool is not locked at the first position and the switching pressure can switch the spool to the second position against the urging member when the engagement pressure is not supplied to the second working oil chamber.

Abstract: A vehicle power transmission device comprises: a continuously variable transmission configured to include a primary pulley, a secondary pulley, and a transmission belt wound between the primary pulley and the secondary pulley; a belt running clutch of hydraulic type for transmitting power to the continuously variable transmission; and a hydraulic control circuit controlling the continuously variable transmission and the belt running clutch, the hydraulic control circuit comprising a fail-safe valve switching a communication destination of an oil supply passage for supplying a hydraulic fluid to the belt running clutch to one of a first oil passage supplied with a control hydraulic pressure and a second oil passage supplied with a hydraulic pressure higher than the control hydraulic pressure, the fail-safe valve connecting the oil supply passage with the second oil passage when the fail-safe valve is switched to a failure position. The second oil passage is provided with an orifice.

Abstract: A hydraulic control device with a second oil passage check valve provided in the second oil passage between a connection portion with the first oil passage and the second solenoid valve, the second oil passage check valve being configured such that a hydraulic pressure is supplied in a direction from the second solenoid valve toward the first oil passage and a hydraulic pressure is not supplied in the opposite direction.

Abstract: A hydraulic control device that includes a second solenoid valve that is capable of supplying a resisting pressure that maintains the switching valve in the non-reverse state against the reverse range pressure, wherein the switching valve is maintained in the non-reverse state by supplying the resisting pressure from the second solenoid valve while a travel range is switched to at least a reverse range during forward travel.

Abstract: A hydraulic control device including: a throttle valve; a pressure regulating valve; an on/off solenoid valve of a normally open type that allows communication therethrough when not energized; and a failure circuit that, when power supply to the linear solenoid valve and the on/off solenoid valve is cut off, supplies a certain hydraulic pressure based on switching off of the on/off solenoid valve to the control oil chamber of the pressure regulating valve.

Abstract: A hydraulic device wherein an orifice is provided upstream of the discharge valve in an oil passage from the electric pump, a drain oil passage from the second hydraulic servo communicates between the orifice and the discharge valve in the oil passage from the electric pump, and an oil pressure in the oil passage upstream of the orifice is maintained at a predetermined pressure higher than the set pressure.

Abstract: A hydraulic control device that includes a source pressure generating valve that generates a source pressure; a solenoid valve that can supply the engagement pressure based on the source pressure; and a supply pressure switching valve that can be switched between a first state where the supply pressure switching valve can supply the engagement pressure to the second engagement element and a second state where the supply pressure switching valve can supply the source pressure to the second engagement element, the supply pressure switching valve being in the first state when the solenoid valve is operating normally, and being switched to the second state in case of abnormality in the solenoid valve.