Abstract:
PROBLEM TO BE SOLVED: To properly determine the malfunction of the clutch of a transmission. SOLUTION: An automobile has a motor and the transmission for transmitting power from a motor to be output to a driving shaft with a change in the connected condition of the clutch. Herein, a rotating speed difference ΔN as an absolute value for a deviation between a rotating speed Nm2 of the motor and (Nr×Gr) that a rotating number Nr of the driving shaft is multiplied by a gear ratio Gr of the transmission is calculated (S110). When the calculated rotating speed difference ΔN is a threshold value Nref2 or more (S130), the rotating speed difference ΔN is integrated to calculate a time integration value In (S140), and when the calculated time integration value In gets to a threshold value Inref or more, the malfunction of the clutch of the transmission is determined (S160, S170). Thus, the malfunction of the clutch of the transmission is determined earlier even when the rotating speed Nm2 of the motor is not so increased. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To suppress an input of excessive power to a battery. SOLUTION: In an automobile, a drive shaft connected to an engine, a motor MG 1 and a vehicle shaft is connected to a planet gear mechanism, the drive shaft is connected to a motor MG 2 via a transmission, and a battery is prepared to exchange power with the motors MG 1 and MG 2. When upshifting is requested (S120), request power Pe* is corrected in a reducing direction (S130) and the engine and the motors MG 1, MG 2 are controlled by the use of the corrected request power Pe* (S160-S230). Consequently, torque directly transmitted from the engine to the drive shaft is reduced and torque outputted from the motor MG 2 is increased. Thus, the input of the excessive power to the battery is suppressed even if the torque outputted from the motor MG 2 is temporarily reduced in order to cancel inertia torque in upshifting. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To prevent a vehicle from rapidly decelerating when any abnormality is generated in a motor MG2. SOLUTION: When any abnormality may be generated in a motor MG2 since the revolution Nm2 of the motor MG2 is increased due to the abnormality of the clutch of a change gear 60, the connection of a rotary shaft 48 of the motor MG2 to a link gear shaft 32a connected to driving wheels 39a and 39b is released by turning off the clutch of the change gear 60. Thus, it is possible to prevent a vehicle from rapidly decelerating when any abnormality is generated in the motor MG2. Also, it is possible to output a power from an engine 22 to the link gear shaft 32a even when any abnormality is generated in the motor MG2. COPYRIGHT: (C)2006,JPO&NCIPI
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 suppress exhaust emission from an internal combustion engine and suppress the occurrence of catalyst odor from a catalyst in an inert state by suppressing load on the internal combustion engine immediately after starting. SOLUTION: In a hybrid automobile having an engine and a motor connected to the engine, when the residual capacity of a battery becomes less and charging to a battery is requested when the automobile is stopped with a shift position at a P range, the charging to the battery is retained and the warmup operation of the engine is continued until a load operation prohibiting time tref set as a time shorter as a cooling water temperature Tw in engine starting is higher is passed (S140). After the load operation prohibiting time tref is passed, a power from the engine is regenerated by the motor and the charging to the battery is started (S150). By this, load on the engine during the warmup operation can be suppressed to suppress the exhaust emission and suppress the occurrence of catalyst odor from the catalyst in the inert state. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To prevent exhaustion of gases which exceeds the cleaning capacity of a catalyst during warming up of vehicle. SOLUTION: The control method for a vehicle includes a step (S106) where a vehicle is run in an EV travel mode in accordance with operation of a driver, a step (S115) for executing warming up of the vehicle travel, if warming up is determined as being required, and a step (S118) which prohibits EV traveling mode so as to allow the warming up travel of the vehicle. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a start controller for an internal combustion engine capable of efficiently reducing rotary reaction force of an engine output shaft at the start of the engine. SOLUTION: An electronic control unit 20 retards the closing timing of an inlet valve through a variable valve timing mechanism 11 at restarting and reduces an actual compression ratio to reduce a load on a generator motor 17 unavoidable for rotating a crankshaft 12 at restarting. At the same time the electronic control unit 20 estimates the rotary reaction force during restarting, and when the estimated rotary reaction force is small, the closing timing of the inlet valve is prohibited from being retarded and a reducing amount of the actual compression ratio during restarting is set smaller comparing to the case of the large rotary reaction force. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To determine the suitability of the ignition timing of an internal combustion engine implemented in promoting the warming-up of a purifying device (catalyst) for purifying the exhaust gas of the internal combustion engine. SOLUTION: When the engine is started by a motor generator, the temperature of exhaust gas is raised by adjusting an ignition advance angle F to a lag side to warm up the purifying device (S102). After the adjustment of the ignition advance angle F, an engine torque Te outputted from the engine is calculated on the basis of reaction torque acting upon the motor generator (S108) and it is determined whether or not engine torque Te is smaller than criterion torque Tref preset corresponding to an engine speed and an intake air amount (S112), and the engine torque reaches the criterion torque Tref or higher, it is determined that ignition timing adjustment has some failure to turn on a warning lamp (S118). Engine output torque and ignition timing have fixed relations, therefore the suitability of the ignition timing adjustment can be determined by monitoring the output torque. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a motor operated valve control system for controlling driving electric power for a three-way change-over valve particularly at extremely low temperatures in a warm-up stroke of an internal combustion engine. SOLUTION: The motor operated valve control system determines that the three-way change-over valve is frozen when the temperature of cooling water is not higher than a predetermined value (Y of S16), and the working condition of the three-way change-over valve after a predetermined time elapsed after voltage supply starting does not reach a predetermined state (Y of S20), it is determined that the three-way change-over valve is frozen. When it is determined the freezing, a driving voltage is stopped to be supplied to the three-way change-over valve (S22). This enables the three-way change-over valve to avoid the risk of damage. An operator is informed to check the concentration of an anti-freezing solution in cooling water (S24) so that an incentive to maintenance can be improved. COPYRIGHT: (C)2004,JPO