Abstract: A failsafe hydraulic circuit designed to avoid simultaneous engagement of two friction engagement elements (e.g., clutches, brakes, etc.) incorporated in a speed change apparatus of a motor vehicle or the like. If a first failsafe valve is in the open position state and a first engaging pressure is supplied to a first hydraulic servo via the first failsafe valve, the first engaging pressure is also input to a first oil pressure switch via a second failsafe valve being in the closed position state. Therefore, using the first oil pressure switch, it can be detected that the first engaging pressure is supplied to the first hydraulic servo. Furthermore, if the first engaging pressure is, for example, greater than the set pressure of the first oil pressure switch, this situation can also be detected. Such detections provide confirmation of normal operation of the first failsafe valve and the second failsafe valve.

Abstract: The drive unit for a vehicle has an engine driving control element for driving a first motor on the basis of an engine driving signal, and driving a second motor so as to restrain a reaction force in a power distributing planetary gear due to the driving of the first motor in a state in which the stepped speed change gear connects the second motor and an output shaft by brakes. Further, the drive unit has an electrically operated oil pump for generating an operating oil pressure of the brakes, and also has a control section having an electrically operated oil pump operation control element for operating the electrically operated oil pump prior to the control of the engine driving control element on the basis of an engine starting signal outputted in a vehicle stopped state.

Abstract: A hybrid drive unit includes a hybrid mechanism having at least one electric motor and a transfer that distributes driving force to front and rear wheels. The electric motor and the transfer are housed in a tubular shaped transmission case that extends in the front and rear directions of a vehicle. The hybrid drive unit is mounted on and supported by a second attachment coupled to an internal combustion engine and provided at a front end of the hybrid drive unit and a first attachment portion fixed to a vehicle body. The electric motor and the transfer that are heavy structural members of the hybrid drive unit are positioned separately to the front and rear of the first attachment portion that forms a boundary. By adopting this configuration, it is possible to reduce the amount of engine vibration that is transmitted to the vehicle body through the first attachment portion.

Abstract: A control apparatus of a hybrid vehicle having a first drive unit, a second drive unit, a HV battery, a shift control element, a battery state detection element, and a shifting-time drive control element. Furthermore, in the control apparatus, a battery balance control element is formed by an engine control element, a first motor control element, a second motor control element and the shifting-time drive control element. If the shift control element determines there is a need for shifting carried out by a stepped transmission, the battery balance control element calculates the amount of increase/decrease in the amount of charge of the HV battery in accordance with the state of the HV battery, and changes the engine operation point on the basis of the calculated amount of increase/decrease in the battery charge, prior to the shifting.

Abstract: A control unit for a vehicle including a controller that determines whether shifting of a stepped transmission is necessary, and increases output torque of a first drive unit and decreases output torque of a second drive unit in correspondence with an increase of the output torque of the first drive unit, the increase and the decrease being performed prior to shifting of the stepped transmission when a determination is made that shifting is necessary.

Abstract: A control system for a hybrid vehicle that is capable of absorbing an inertial force which is generated during shifting of a stepped transmission. During shift control of the stepped transmission by a shift control device and before the shift control is completed, a during-shift drive control element controls a driving force which is output from a second drive unit such that a total driving force which is output from first and second drive units to the drive wheels equals a driver request output. Further, the during-shift drive control elements executes control so as to reduce a difference between the total driving force output to a drive wheel and the driver request output based on a change in a transmission force of the stepped transmission caused by a switch-over between a first brake and a second brake.

Abstract: A drive unit for a vehicle structured so as to be able to attain an interrupting state of inertia of a drive motor under a predetermined condition. Therefore, the drive unit for a vehicle has a drive motor able to transmit driving force to a drive wheel, and an operation lever for selecting a shift range for switching the drive motor between drive and non-drive. Further, the drive unit for a vehicle has a control section having a shift position detector for detecting the shift range selected by the operation lever. The drive unit for a vehicle also has brakes for attaining a neutral state by interrupting the power transmission between the drive motor and the drive wheel when the selection of a parking range is detected by the shift position detector. Thus, a state for applying no inertia of the drive motor to a parking device, is obtained even when the parking device is operated during a slight speed running.

Abstract: A vehicle control apparatus including an engine, an automatic transmission, a hydraulic servo, a mechanical oil pump, an electric oil pump and a controller that controls driving of the electric oil pump and generates a standby pressure supplied to the hydraulic servo based upon a driving state of the mechanical oil pump, wherein the standby pressure is set less than a line pressure generated based upon driving the mechanical oil pump during idling and equal to or greater than an engagement starting pressure by which the friction engagement element starts transmitting a torque.

Abstract: A hybrid-vehicle drive unit supports a motor-generator with high precision, improving the efficiency of the motor-generator, and reducing the size of the motor-generator, independent of any influence of centering precision of the crank shaft and of deformation of the torque converter. According to the invention, a motor housing is disposed between a converter housing and an internal combustion engine, and a bearing is fitted to a lateral wall provided in a front portion of the motor housing. Rotor supporting members are independently supported by the bearing. Eccentric rotation of the crank shaft resulting from explosive vibrations of the engine is counteracted by two flex plates. Owing to a predetermined clearance, one of the rotor supporting members as a separate component is free from the influence of deformation of the torque converter.

Abstract: The clutch oil pressure (PC1) supplied to a hydraulic controller of an automatic transmission is detected. If it is detected that the clutch oil pressure (PC1) is less than or equal to a first threshold value PA when a first oil pump cooperative with a drive power source is to stop, the second oil pump is driven. Therefore, after the oil pressure (for example, PY) remaining from the first oil pump has decreased, the second oil pump is driven, and an oil pressure (PX) needed for the hydraulic control of friction engagement elements is maintained. If it is detected that the clutch oil pressure (PC1) is greater than or equal to a second threshold value (PB) when the first oil pump is to be driven, the second oil pump is stopped. Therefore, the second oil pump is stopped when the oil pressure provided by the first oil pump rises to such a level that the oil pressure (PX) can be secured. Thus, the load on the second oil pump is reduced so as to allow it to be reduced in size.

Abstract: An output of an internal combustion engine is transmitted to an output shaft by controlling a control motor to change a speed without speed steps, in a power distribution planetary gear. An output of a drive motor is input to the output shaft by changing the speed into two-step decelerated rotation by means of an automatic transmission. The transmission produces a desired torque by decelerating the speed by a large degree when a vehicle speed is low, and produces a desired number of revolutions by decelerating the speed by a small degree when the vehicle speed is high.

Abstract: A hybrid vehicle drive system is designed to have dimensions that are shorter in an axial direction and improved centering accuracy of a rotor, in order to prevent deterioration of motor performance. A rotor support plate (15) has a flat-plate shaped disk portion (15b), and is fixed to a front cover (32) of a take off device (5), such as a torque converter, or the like, at the disk portion with a set block (67) and a bolt (69). A forward portion of the take off device is centered and supported by fitting a center piece (33) to a crankshaft (3). A support-plate hub (15a) is in contact with the center piece (33) at a small area (33c) in a vicinity of a fixing plane P of the disk portion (15b) and the set block (67), and thus centering of the rotor (13) is executed.

Abstract: The present invention provides a drive control apparatus for driving an electric oil pump by supplying it with a predetermined operating voltage so as to decrease a load on the electric oil pump. The drive control apparatus detects a clutch hydraulic pressure supplied to the hydraulic control apparatus for the automatic transmission and drives the electric oil pump so that a required hydraulic pressure is maintained. In this case, the drive control apparatus detects an oil temperature of the hydraulic control apparatus for the automatic transmission, controls the operating voltage of the electric oil pump based on the oil temperature, and supplies the operating voltage to th electric oil pump. Accordingly, the hydraulic pressure supplied from the electric oil pump maintains the hydraulic pressure required for the hydraulic control of the automatic transmission and prevents supply of a greater hydraulic pressure than is required.

Abstract: A hybrid drive unit including a first motor, a first planetary gear and a second motor, wherein the first planetary gear distributes and transmits a drive force transmitted from an input shaft to the first motor and an output shaft, a power output from the output shaft and the second motor are synthesized and the first motor and the first planetary gear are housed in a transmission case with the second motor spaced from the transmission case.

Abstract: A driving control device of a vehicle including an automatic transmission with a hydraulic control device which hydraulically controls an engagement of the frictional engagement element, a mechanical oil pump which is driven by the engine and supplies hydraulic pressure to the hydraulic control device and an electric oil pump which supplies hydraulic pressure to the hydraulic control device and a motor connected to the mechanical oil pump and transmitting the driving force to the automatic transmission, wherein the electric oil pump supplies oil to the hydraulic control device at an engine automatic stopping control time at which the driving of the engine is automatically stopped after the vehicle stops and a predetermined condition is established and the motor is driven so that said mechanical oil pump supplies the oil to the hydraulic control device during the engine automatic stopping control at a time when the electric oil pump can not be driven.

Abstract: A motor 12 includes a cylindrical rotor 20, a stator 19 arranged at a predetermined distance from an outer periphery of the rotor 20, and a position sensor 23 for detecting a rotational position of the rotor 20, wherein the stator 19 includes a stator core 19a and a plurality of stator windings 19b arranged along a circumferential direction of the stator core 19a at substantially equal distances from one another. A shield plate 26 for shielding magnetic flux from the stator windings 19b to the position sensor 23 is mounted against the stator core 19a. Magnetic flux from the stator windings pass through a closed loop starting from the stator windings 19b through the stator core 19a and the shield plate 26 and back to the stator windings to prevent the magnetic flux leakage from the stator windings 19b from flowing to another member. With this arrangement, the magnetic flux leakage from the stator windings does not affect the position sensor (magnetic sensor) which detects the rotational position of the rotor.

Abstract: A vehicle control apparatus including an engine, an automatic transmission, a hydraulic servo, a mechanical oil pump, an electric oil pump and a controller that controls driving of the electric oil pump and generates a standby pressure supplied to the hydraulic servo based upon a driving state of the mechanical oil pump, wherein the standby pressure is set less than a line pressure generated based upon driving the mechanical oil pump during idling and equal to or greater than an engagement starting pressure by which the friction engagement element starts transmitting a torque.

Abstract: A driving control device for an electric vehicle includes an electric machine which is driven by a current supplied from a battery, a transmission which is coupled with the electric machine and performs shifting at a predetermined gear ratio, a charging state detecting portion which detects an electric variable that shows a charging state of the battery, a fail determination processing device which determines whether the electric variable exceeds a threshold value and makes a fail determination when the electric variable exceeds the threshold value, and a charging control processing device which decreases a rotational speed of the electric machine and reduces the electric variable when the fail determination is made. The fail determination is made to decrease the rotational speed of the electric machine when field weakening control becomes unperformable and the electric variable exceeds the threshold value, which makes it possible to prevent an overcurrent from being supplied to the battery.

Abstract: If a torque reduction request is outputted during a speed shift, the amount of motor torque reduction achieved by a motor-generator, of a requested amount of torque reduction, is set to a greatest-possible amount, and the amount of engine torque reduction achieved by an engine is set to a smallest-possible amount. The amount of motor torque reduction is set based on the amount of charges stored (SOC) in a battery device. If SOC≦SOC1, the amount of motor torque reduction is set to a maximum value regardless of the value of SOC. If SOC1<SOC≦SOC2, the amount of motor torque reduction is set in accordance with SOC. If SOC2<SOC, the amount of motor torque reduction is set to zero. Thus, the amount of motor torque reduction is set to a greatest-possible value in accordance with the amount of charges stored (SOC).

Abstract: A driving control device of a vehicle including an automatic transmission with a hydraulic control device which hydraulically controls an engagement of the frictional engagement element, a mechanical oil pump which is driven by the engine and supplies hydraulic pressure to the hydraulic control device and an electric oil pump which supplies hydraulic pressure to the hydraulic control device and a motor connected to the mechanical oil pump and transmitting the driving force to the automatic transmission, wherein the electric oil pump supplies oil to the hydraulic control device at an engine automatic stopping control time at which the driving of the engine is automatically stopped after the vehicle stops and a predetermined condition is established and the motor is driven so that said mechanical oil pump supplies the oil to the hydraulic control device during the engine automatic stopping control at a time when the electric oil pump can not be driven.