Abstract: A controller for a hybrid vehicle is configured to execute a shifting assist process of increasing torque of a motor when performing power-on downshift of an automatic transmission and an upper limit assist torque setting process of setting an upper limit assist torque that is an upper limit value of a travel assist torque to be a smaller value when a maximum step number of the power-on downshift is large than when the maximum step number is small.

Abstract: A controller for a hybrid vehicle is configured to execute a shifting assist process of increasing torque of a motor when performing power-on downshift of an automatic transmission and an upper limit assist torque setting process of setting an upper limit assist torque that is an upper limit value of a travel assist torque to be a smaller value when a maximum step number of the power-on downshift is large than when the maximum step number is small.

Abstract: An automatic transmission where the control portion controls the adjustment solenoid valve so that the circulation hydraulic pressure equals to a second circulation hydraulic pressure higher than the first circulation hydraulic pressure when the rotational speed difference between the output rotational speed of the fluid transmission device and the rotational speed of the driving source is more than the predetermined rotational speed.

Abstract: An automatic transmission where the control portion controls the adjustment solenoid valve so that the circulation hydraulic pressure equals to a second circulation hydraulic pressure higher than the first circulation hydraulic pressure when the rotational speed difference between the output rotational speed of the fluid transmission device and the rotational speed of the driving source is more than the predetermined rotational speed.

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 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 gear position display device includes a transmission having a plurality of gear positions, a speed-changing control portion outputting a speed-changing instruction, a display portion displaying a gear position of the transmission, and a detection portion detecting a speed-changing state of a gear position based on the speed-changing instruction, wherein a gear position based on the speed-changing instruction from the speed-changing control portion is displayed after the detection portion confirms actual starting of speed-changing.

Abstract: A control apparatus and a control method for an automatic transmission installed in a vehicle, which detect an inclination of a road on which the vehicle is running; calculate actual torque of an engine installed in the vehicle; store reference torque of the engine; correct an inclination threshold value based on the actual torque and the reference torque and make a determination on whether ascending slope control or descending slope control needs to be performed in the vehicle based on the detected inclination of the road and the corrected inclination threshold value; and control the automatic transmission to perform the ascending slope control or the descending slope control based on the result of the determination. Thus, the control apparatus and the control method make an accurate determination on an ascending slope in a highland area, and accurately perform the ascending slope control or the descending slope control.

Abstract: A gear position display device includes a transmission having a plurality of gear positions, a speed-changing control portion outputting a speed-changing instruction, a display portion displaying a gear position of the transmission, and a detection portion detecting a speed-changing state of a gear position based on the speed-changing instruction, wherein a gear position based on the speed-changing instruction from the speed-changing control portion is displayed after the detection portion confirms actual starting of speed-changing.

Abstract: When a shift routine is not being executed in an automatic transmission and a difference between an actual turbine speed and a calculated synchronous speed is equal to, or greater than, a preset value ?, a difference ?NT between an estimated turbine speed and the actual speed when the automatic transmission is in a neutral state is calculated. When ?NT is equal to, or less than, a preset value ?, it is determined that a failure related to the neutral state of the automatic transmission has occurred. Also, when ?NT is greater than a preset value ?, it is determined that a failure related to slipping of a frictional engaging element has occurred.

Abstract: A control apparatus and a control method for an automatic transmission installed in a vehicle, which detect an inclination of a road on which the vehicle is running; calculate actual torque of an engine installed in the vehicle; store reference torque of the engine; correct an inclination threshold value based on the actual torque and the reference torque and make a determination on whether ascending slope control or descending slope control needs to be performed in the vehicle based on the detected inclination of the road and the corrected inclination threshold value; and control the automatic transmission to perform the ascending slope control or the descending slope control based on the result of the determination. Thus, the control apparatus and the control method make an accurate determination on an ascending slope in a highland area, and accurately perform the ascending slope control or the descending slope control.

Abstract: When a shift routine is not being executed in an automatic transmission and a difference between an actual turbine speed and a calculated synchronous speed is equal to, or greater than, a preset value &agr;, a difference &Dgr;NT between an estimated turbine speed and the actual speed when the automatic transmission is in a neutral state is calculated. When &Dgr;NT is equal to, or less than, a preset value &bgr;, it is determined that a failure related to the neutral state of the automatic transmission has occurred. Also, when &Dgr;NT is greater than a preset value &bgr;, it is determined that a failure related to slipping of a frictional engaging element has occurred.