Abstract:
PROBLEM TO BE SOLVED: To lubricate a planetary gear mechanism more appropriately in a power output system, an automobile equipped therewith, a control device for the power output system, and a control method for the power output system. SOLUTION: In the automobile wherein an engine, a motor MG1 and a driveshaft are connected to the planetary gear mechanism and a motor MG2 is connected to the driveshaft via a transmission, if a hydraulic circuit 100 for actuating brakes B1 and B2 of the transmission fails and disables the supply of oil used in actuating the brakes B1 and B2 to the planetary gear mechanism 30 as a lubricant via an oil passage 116, the engine is continuously operated. Out of oil from a mechanical pump 102 having sufficient force feed performance in actuating the brakes B1 and B2 and oil from an electric pump 104 having minimum necessary force feed performance in actuating the brakes B1 and B2, oil not used in actuating the brakes B1 and B2 can be thus supplied to the planetary gear mechanism 30 via the oil passage 116 to lubricate the planetary gear mechanism 30. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To more appropriately deal with abnormality of a transmission in a vehicle which outputs power from a motor to a drive shaft through the medium of a transmission. SOLUTION: When traveling with a brake B 1 engaged and a brake B2 not engaged, while a control valve 108 is opened by bring a linear solenoid SLB1 into a non-energized state, a control valve 109 is opened through the energization of a linear solenoid SLB2 at a prescribed duty ratio so as to discharge air mixed into the device with a fail safe valve 115 closed by oil pressure from the opened control valve 108. When the circuit of the a linear solenoid SLB1 is short-circuited in this state, the energization of the linear solenoid SLB2 is stopped to close a control valve 109. Both brakes B1, B2 are brought into a non-engaged state to separate the motor from a drive shaft. By so doing, unexpected change of a change gear stage can be prevented to suppress shock. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To suppress the deterioration of performance of a power output device, when an operation mode which tends to increase the responsiveness of the output of a power, with respect to a driving force request operation is selected in a power output device equipped with an internal combustion engine and a motor. SOLUTION: In a hybrid car 20 capable of traveling, in either the normal mode or the power mode, when at least either of motor temperature T1 or T2 is a reference motor temperature Tmref or higher, and the oil temperature Tatf of lubricating and cooling oil is a reference oil temperature Tfref or higher; and it is decided that the load restriction of the motors MG1 and MG2 are necessary, a mode flag Fmd is set to "0" so that the power, based on accelerator operation, can be output to a ring gear shaft 32a as a driving shaft, by using a map for setting an accelerator opening degree in the normal mode, regardless of the selected state of the operation mode by a driver (steps S300 to S340). COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To properly take countermeasures when such abnormality that all shift levels can not be formed in a transmission which transmits a power from a motor to a driving shaft according to the speed change of two shift levels. SOLUTION: When the status of an Lo gear can not be formed in a transmission (steps S100 to 120), the transmission is shifted to the status of an Hi gear (step S130), and when the status of the Hi gear can not be formed in the transmission (steps S140, S150), it is judged that such abnormality that all shift statuses can not be formed in the transmission occurs, and the driving of the motor is inhibited (step S170). Thus, the motor is prevented from being excessively rotated by inhibiting the driving of the motor, and countermeasures to such abnormality that all the shift levels can not be formed in the transmission are properly taken. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To suppress deterioration in a function of an actuator for driving a transmission in a vehicle equipped with the transmission for transmitting power of a motor and an axle side accompanying a change in the shift stage. SOLUTION: In the power output system, when a shift operation to a parking position is performed in a state of a brake B1 in non-engagement and a brake B2 in engagement continuing over a long period of time, a control valve 108 is opened by both of linear solenoids SLB1, SLB2 being non-energized, and a control valve 109 is closed, the brake B1 is in engagement, and the brake B2 is in non-engagement. Thereby, air accumulated in a hydraulic system on the side of supplying oil pressure to the brake B1 such as the linear solenoid SLB1 and the control valve 108 can be bleeded. As a result, deterioration in the function of a hydraulic circuit 100 can be suppressed. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To prevent an unexpected driving force from being output when the torque transfer of a transmission is not sufficient and to deal with such a situation more appropriately. SOLUTION: If the high pressure generating system of a hydraulic circuit in the transmission fails and the torque transfer capacity of the transmission is not sufficient, the line pressure of the hydraulic circuit is fixed at low pressure and shifts are inhibited to limit the torque of a motor MG 2 (S160-S180). During a motor-driven mode, the start of the engine is inhibited (S200). During an engine-driven mode, the intermittent operation of the engine is inhibited (S230). In this way, the torque of the motor MG 2 can be transferred within the range of the torque transfer capacity of the transmission and the output of unexpected torque can be avoided at the start of the engine. As a result, a situation in which the torque transfer capacity of the transmission is insufficient can be dealt with more appropriately. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To prevent generation of shock when causing a rotation speed to be a value of zero by stopping operation of an engine.SOLUTION: A stop permission vehicle speed Vev1 is set (S160) so that an inverter is controlled by a control system (sine wave control system) executing vibration damping control by a motor MG2 in a region where a vehicle speed V is equal to or less than the stop permission vehicle speed Vev1 in accordance with a permissible upper limit voltage VHlim of a driving voltage system power line (in a tendency such that it becomes lower as the permissible upper limit voltage VHlim becomes lower). When required power Pe* is equal to or less than a stop threshold Pstop during operation of an engine (S120, S130), the operation of the engine is stopped so that the rotation speed is caused to be a value of zero (S190) when the vehicle speed V is equal to or less than the stop permission vehicle speed Vev1, and operates the engine in a self-sustained manner when the vehicle speed V is higher than the stop permission vehicle speed Vev1 (S180).
Abstract:
PROBLEM TO BE SOLVED: To provide a hybrid vehicle capable of eliminating a possibility of occurrence of situation where an oil pressure cannot be ensured when stopping an engine to run by a motor alone while running. SOLUTION: When conditions of shifting to an EV running mode are determined to be satisfied (YES in S20), a controller starts an electric oil pump (S30), and determines whether abnormality occurs in the electric oil pump (S40). When the electric oil pump is determined to be abnormal (YES in S40), the controller prohibits the stop of the engine (S50) and outputs an alarm to a driver (S60). When the electric oil pump is determined to be normal (NO in S40), the controller stops the engine (S70). COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To surely output power when a rotation detection means of an electric motor for outputting power to a drive shaft is suspected to be in an abnormal state. SOLUTION: A hybrid vehicle 20 drives and controls a motor MG1 and an engine 22 to start the engine 22 when a state of a rotational position detection sensor 44 for detecting a rotation state of a motor MG2 is not detected to be normal at system startup, and then drives and controls the engine 22 and the motor MG1 so that only torque output from the engine 22 via the motor MG1 is output to a ring gear shaft 32a when a state of the rotational position detection sensor 44 is detected to be in abnormal condition. Thus, power is surely output by starting the engine 22 because the engine 22 may not start thereafter when the rotational position detection sensor 44 is suspected to be in an abnormal state. COPYRIGHT: (C)2009,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To prevent the number of revolutions of a motor from rising abruptly by suppressing components of a transmission from wearing, and suppressing the number of revolutions of a driveshaft from varying unexpectedly if at least either a driveshaft revolution sensor for detecting the number of revolutions of the driveshaft or a rotating position sensor for detecting the rotating position of the rotor of the second motor fails, in an automobile in which the driveshaft connected to a first motor, an engine and driving wheels is connected to the sun gear, the carrier and the ring gear of a planetary gear mechanism and in which the second motor is connected to the driveshaft via a transmission. SOLUTION: When at least either the driveshaft revolution sensor or the rotating position sensor fails (S110), the operation of the engine is continued and a torque command Tm2* for the second motor is set at a value of zero (S320-S340); the transmission ratio of the transmission is not changed. COPYRIGHT: (C)2007,JPO&INPIT