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 C1 relay valve 70 whose state is switched based on a signal pressure that is generated based on a line pressure PL, and a check valve 80 attached to a drain oil passage L7. A set pressure of the check valve 80 is adjusted to an oil pressure that is lower than the maximum oil pressure obtained by discharge capability of an electromagnetic pump 60 and higher than an SL1 pressure Psl1 remaining in a hydraulic servo of a clutch C1 when the state of the C1 relay valve 70 is switched after a mechanical oil pump 42 is stopped. Operation of the electromagnetic pump 60 is started before the state of the C1 relay valve 70 is switched after the mechanical oil pump 42 is stopped.

Abstract: A spool valve that has a hollow portion formed with an input port, a first output port, and a second output port, and a spool capable of sliding within the hollow portion and having a plurality of lands, the spool valve being configured to distribute output for input to the input port to the first output port and the second output port in accordance with a proportion of distribution that matches a position of the spool. An opening of the second output port is formed in such a shape that a width of the opening becomes gradually smaller in a direction of movement of the spool in which distribution of the output to the first output port is increased.

Abstract: A hydraulic control device has: a modulator valve using oil pressure from a hydraulic source for adjusting a modulator pressure; driving and driven-side hydraulic actuator control valves controlling hydraulic oil from the source to driving and driven-side hydraulic actuators; a driving-side control oil pressure adjusting electromagnetic valve using the modulator pressure for outputting a control oil pressure controlling the driving-side control valve; and a driven-side control oil pressure adjusting electromagnetic valve for outputting a control oil pressure controlling the driven-side control valve, the hydraulic control device including a failsafe valve switched from a normal to a failure position based on a failure disabling electric control for the driving-side and driven-side electromagnetic valves, the modulator valve making the modulator pressure lower than a value at the normal position based on an output switching pressure generated due to switching the failsafe valve from the normal to the failure p

Abstract: A hydraulic control device is provided with a solenoid valve, a pressure regulating valve, a switching valve, and a control unit. The control unit, when shifting from a first shift speed to a second shift speed, causes a first signal pressure to be input to an oil chamber of the switching valve with the pressure regulating valve, and presses a valving element to a first input port side to be locked at a blocking position at which communication between the first input port and an output port is blocked at least until a third engagement element is brought into an engaged state from a disengaged state.

Abstract: A hydraulic control device that includes a solenoid valve capable of supplying a first engagement pressure to the first engagement element; and a first cut valve that is interposed in an oil passage from the solenoid valve to the first engagement element and is capable of cutting off supply of a hydraulic pressure to the first engagement element, wherein only the first engagement pressure and a second engagement pressure serve as hydraulic pressures that act such that the first cut valve cuts off the supply of the hydraulic pressure to the first engagement element, and the first cut valve is switched so as to cut off the supply of the hydraulic pressure to the first engagement element when the first engagement pressure and the second engagement pressure are simultaneously supplied to the first engagement element and the second engagement element, respectively.

Abstract: A range switching device for switching supply and non-supply of a source pressure based on a hydraulic pressure from a hydraulic pressure generating source to a parking device, the parking device being switched into a parking release state while the source pressure is supplied thereto and being switched into a parking state while the source pressure is not supplied thereto.

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 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 control device that includes a second switching valve that is switchable between a third position in which the forward range pressure input from the first switching valve is output to the shift controller and the reverse range pressure is blocked when the second signal pressure is off and a fourth position in which the reverse range pressure input from the first switching valve is output to the shift controller and the forward range pressure is blocked when the second signal pressure is on.

Abstract: A hydraulic control device that includes a normally closed first solenoid valve, a first check valve, a failsafe valve, and a second check valve, wherein the first movable member of the first check valve is biased to cut off the communication between the first input port and the first drain port in case of the failure in which no current is applied to the first solenoid valve.

Abstract: A modulator, demodulator, transmission device, and reception device for digital data that have excellent resistance to noise are provided. A modulator according to one aspect of this disclosure includes a modulation mapper (15) that performs 16APSK mapping at a radius ratio of 2.87 when the LDPC code rate is 93/120. A modulator according to another aspect of this disclosure includes a modulation mapper (15) that performs 32APSK mapping at a second inner circle to first inner circle radius ratio of 2.87 and an outer circle to first inner circle radius ratio of 5.33 when the LDPC code rate is 93/120. The modulator is included in a transmission device (1) according to this disclosure. A demodulator according to this disclosure includes a quadrature detector (21) that performs demodulation corresponding to the modulator. The demodulator is included in a reception device (2) according to this disclosure.

Abstract: A power transmission device that includes a transmission including a plurality of engagement elements for transmitting power from a motor to axles; a case to accommodate the transmission; a hydraulic control device to control hydraulic pressure to the engagement elements; a hydraulic oil reservoir that stores hydraulic oil; and a first pump that is operated by the power from the motor and that suctions the hydraulic oil from the hydraulic oil reservoir through a strainer and supplies the hydraulic oil to the hydraulic control device.

Abstract: A jump shift of an automatic transmission with multiple shift speeds such as, e.g., ten forward speeds involves operation of many engagement elements. The shifting operation for the jump shift is therefore complicated, making it difficult for the automatic transmission to respond quickly. After shifting to the seventh speed as a direct coupling speed is completed by engaging three clutches C1, C3, C4, the remaining other clutch C2 is also engaged at the seventh speed. In the case of a jump shift, e.g., a shift from the seventh speed to the fifth speed, shifting to the fifth speed is completed by disengaging the clutch C1 and performing control to disengage the clutch C3 and to engage a brake B1 with the remaining other clutch C2 kept in the engaged state. This facilitates the shifting operation from the direct coupling speed and allows the automatic transmission to respond quickly.

Abstract: A transmission device and reception device for digital data that have excellent resistance to noise are provided. An encoder (11-1) of this disclosure, included in a transmission device (1) of this disclosure, applies LDPC encoding to digital data using a unique check matrix for each code rate by using a check matrix in which, taking a check matrix initial value table established in advance for each code rate at a code length of 44880 bits as initial values, 1 entries of a partial matrix corresponding to an information length appropriate for a code rate of 93/120 are allocated in the column direction over a cycle of 374 columns. A demodulator (23) of this disclosure, included in a reception device (2) of this disclosure, decodes digital data encoded by the encoder (11-1).

Abstract: A hydraulic control device that includes two hydraulic oil chambers, wherein a predetermined engagement element of the engagement elements is an engagement element that includes the two hydraulic oil chambers and is engageable and disengageable when an engagement pressure is supplied to and discharged from at least one of the two hydraulic oil chambers, and a control unit that reduces supply of the engagement pressure to one of the two hydraulic oil chambers to a level lower than that in a state in which a first shift speed is established, when the control unit performs shifting from the state in which the first shift speed is established by supplying the engagement pressures to both of the two hydraulic oil chambers and engaging the predetermined engagement element to a second shift speed by switching engagement and disengagement states of engagement elements other than the predetermined engagement element.

Abstract: A hydraulic control device for an automatic transmission, the hydraulic control device includes: a throttle valve, a primary regulator valve and a failure circuit that includes a first solenoid valve that is switched when the throttle valve is subjected to a failure in which the throttle valve is unable to output the throttle pressure, and that leads a predetermined hydraulic pressure based on switching of the first solenoid valve to the control oil chamber of the primary regulator valve.

Abstract: A hydraulic control device is provided with a solenoid valve, a pressure regulating valve, a switching valve, and a control unit. The control unit, when shifting from a first shift speed to a second shift speed, causes a first signal pressure to be input to an oil chamber of the switching valve with the pressure regulating valve, and presses a valving element to a first input port side to be locked at a blocking position at which communication between the first input port and an output port is blocked at least until a third engagement element is brought into an engaged state from a disengaged state.

Abstract: A hydraulic control apparatus, wherein the first switching valve receives an input of one of the hydraulic pressure from the first electromagnetic valve device and the predetermined hydraulic pressure from the third switching valve, as a switching signal pressure, the first switching valve is switched from the first state to the second state in response to the input of the switching signal pressure, and the first switching valve is held in the second state, and the second switching valve receives an input of one of the hydraulic pressure from the first electromagnetic valve device and the predetermined hydraulic pressure from the third switching valve, as a holding pressure for holding the normal supply state.

Abstract: A hydraulic control device for an automatic transmission, wherein when the first switching valve is switched to the first state while the second switching valve is in the third state, the reverse range pressure applied from the reverse range pressure input port of the second switching valve can be supplied from the first output port to the hydraulic servo for the first friction engagement element via the fourth output port of the second switching valve and the first input port of the first switching valve, and when a shift range is shifted from a neutral range to a reverse range, the second switching valve is in the fourth state, and the first switching valve is switched from the first state to the second state, so that the reverse range pressure applied to the reverse range pressure input port is cut off by the second switching valve.