Abstract:
PROBLEM TO BE SOLVED: To avoid shifting shock during malfunction while quickly changing over a shift stage. SOLUTION: This automobile has a motor connected to a drive shaft via a transmission. Herein, in preparation for down-shift of the transmission with the engagement of a brake B2, a line hydraulic pressure PL is put into the condition of high pressure Phi by using a three-way solenoid 106 for adjusting a pressure control valve 108 to be opened/closed and then first fill for filling oil in a pack is executed by using a linear solenoid 111 for adjusting a control valve 113 to be opened/closed, and the line hydraulic pressure PL is changed over from the condition of the high pressure Phi to the condition of low pressure Plo after finishing the first fill for the engagement of the brake B2. Thus, the preparation of the engagement of the brake B2 is quickly executed and the shifting shock is avoided because the brake B2 does not suddenly engage even when the line hydraulic pressure BL is operated directly on the brake B2 with the malfunction of the linear solenoid 111 or others. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a state detecting device for a transmission, preventing an error in detecting the state of the transmission. SOLUTION: In a running gear for outputting power from a motor via the transmission to a driving shaft, a rotating speed Nr (a thick solid line in Fig.) of the driving shaft detected by a sensor (for example, a MRE sensor) which has detecting responsiveness changed with the rotating speed of the driving shaft has a response delay from a change in an actual rotating speed Nr (a thin solid line in Fig.) of the driving shaft when the rotating speed of the driving shaft is changed, while a rotating speed Nm2 (a thin dotted line in Fig.) of a motor detected by a sensor (for example, a resolver) which has relatively high accuracy and high responsiveness is almost equal to the actual rotating speed of the motor even when the rotating speed of the motor is changed. At this time, a moderating constant which is set to correspond to a response delay time constant is used for applying moderating control to the rotating speed Nm2 of the motor to calculate a regulated rotating speed Nm2smo (a thick dotted line in Fig.) so that a gear ratio calculated by dividing it by the rotating speed Nr is used for determining the malfunction of the transmission. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a power supply device that accurately detects the occurrence of abnormalities in a voltage conversion device. SOLUTION: When acquiring a DC current value (an IB sensor value) detected by a current sensor 11, a control device 30 determines whether or not the acquired IB sensor value is close to an IB zero cross point. When the IB sensor value is not close to the IB zero cross point, the control device 30 sets an allowable range that a VH sensor value during a normal state can take while considering detection errors of voltage sensors 13, 20, a dead time, and a switching delay of switching elements Q1, Q2 and compares the actual VH sensor value with the allowable range so as to execute the abnormality determination of a step-up/step-down converter 12. On the other hand, when the IB sensor value is close to the IB zero cross point, the control device 30 inhibits execution of the abnormality determination. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To properly compensate a drop of voltage applied to a motor due to dead time of an inverter. SOLUTION: When over-modulated with a large amplitude of carrier signal in pulse width modulation control to an amplitude of control phase voltage to be applied to respective phases of the motor, a correction voltage is set by applying a voltage current phase difference and the number of synchronizations to a map where a relation of a voltage current phase difference being a phase difference between a voltage applied to the respective phases of the motor and a current applied to the respective phases of the motor, the number of synchronizations, which is the number of triangular-wave voltages of pulse width modulation control in a period of control phase voltage of the motor and correction voltage is previously decided. Correction voltage is added to control voltage which is to be applied to the respective phases of the motor based on target torque of the motor, and a phase voltage command of the motor is set. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a motor control device that ensures the power performance of a motor by sine wave PWM control as much as possible when the motor becomes impossible in rectangular wave control. SOLUTION: The motor control device 10 for a vehicle includes a converter 14 that boosts a DC voltage fed from a battery 12, an inverter 16 which converts the boosted DC voltage which is fed from the converter 14 to an AC voltage, and applies the AC voltage to the motor 18, and a control unit 20 that switches drive control methods of the motor 18 by controlling the operations of the converter 14 and the inverter 16. When the rectangular wave control becomes impossible, the control unit 20 selects a sine wave PWM control fixing mode which uses only the sine wave PWM control as the drive control method of the motor 18, and sets the maximum boosted voltage in the converter 14 to a large value as much as possible. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To further properly control a three-phase AC motor. SOLUTION: When the rotational frequency Nm of a motor is not suddenly changed, averaging processing for making a time constant T to a value T1 is executed to currents Id, Iq of a d-axis and a q-axis obtained by executing coordinate conversion of phase currents Iu, Iv detected by a current sensor so as to calculate control currents fId, fIq (S170, S190). When the rotational frequency Nm of the motor is suddenly changed, averaging processing for making the time constant T to a value T2 smaller than the value T1 is executed to the currents Id, Iq of the d-axis and the q-axis so as to calculate the control currents fId, fIq (S180, S190). Feedback control based on the calculated control currents fId, fIq is executed so as to drivingly control the motor (S200-S260). By this, it is possible to reduce effects of a higher harmonic wave component included in the phase currents Iu, Iv detected by the current sensor, thereby allowing execution of the feedback control, and also, allowing the motor to be drivingly controlled by ensuring responsiveness even when the rotational frequency Nm of the motor is suddenly changed. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a controller of a hybrid car in which lowering of output torque can be avoided at the end of speed change even if torque compensation control is performed during speed change. SOLUTION: The controller of a hybrid car where the output torque of an internal combustion engine is distributed to a generator and an output shaft and a motor being driven with a power from the generator is coupled with the output shaft through a speed change gear comprises a torque compensation control means for controlling the generator in the direction for suppressing a variation in torque of the output shaft during speed change through the speed change gear (steps S30, S31), and a means for stopping control of the generator by the torque compensation control means based on the power generating state of the generator during speed change through the speed change gear (steps S34, S35). COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a power supply system in which a switching element of a converter provided corresponding to a power storage device is properly controlled when the flow direction of a current of the power storage device is changed, and also to provide a vehicle equipped with the power supply system. SOLUTION: An ECU 100 controls a switching operation of an upper arm element and a lower arm element so that a dead time exists in which the upper arm element and the lower arm element of the converter 10 are simultaneously turned off. The ECU 100 steps up a voltage VH by reducing the duty ratio of the upper arm element when the voltage VH is dropped below a target voltage. When the direction of a current IB flowing through the power storage device B1 is changed from a negative direction, which is the direction to the power storage device B1 from the converter 10, to a positive direction opposite to the negative direction, the ECU 100 limits reduction in the duty ratio for stepping up the voltage VH as compared with an ordinary time in which the direction of the current IB is not changed from the negative direction to the positive direction. COPYRIGHT: (C)2010,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To more appropriately drive a motor in a vehicle equipped with the motor capable of outputting power to a driving shaft. SOLUTION: Lubricating and cooling oil is used to lubricate or cool a speed change gear that changes the speed of a motor or power from the motor and outputs it to a driving shaft. An execution oil temperature Toil* is set as a temperature obtained by subjecting the oil temperature Toil of the above lubricating and cooling oil to gentle change processing (Step S180). The duty ratio R2 of a motor MG2 is set based on the set execution oil temperature Toil* and the coil temperature Tcoil2 of the motor (Step S190). A motor torque command Tm2* is set using the set duty ratio R2 and driving of the motor is controlled so that the torque corresponding to the torque command Tm2* is output (Step S200). Since the oil temperature Toil of the lubricating and cooling oil is taken into account when driving of the motor is controlled, the motor can be more appropriately driven as compared with cases where the temperature of the lubricating and cooling oil is not taken into account. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To rapidly boost driving force of a hybrid drive system at the beginning of operation. SOLUTION: An assistant power source is connected with an output member transmitting torque of a primary power source via a speed change mechanism in a control unit of the hybrid drive system. Speed change controlling means (step S06 to S09) switching controlling states of speed change at the basis of operating states of the primary power source when starting the primary power source comprises: a speed change inter-preparation controlling means (step S06) performing speed change preparation control preceding to speed change control when an operating state of the primary power source is started with external force, a speed change after-preparation controlling means (step S08) executing speed change control when the operating state of the primary power source starts its motions without any aid of external force, a speed change prohibiting means (step S07) performing prohibition of speed change, and a speed change permitting means (step S09) performing permission of speed change. COPYRIGHT: (C)2005,JPO&NCIPI