Abstract:
PROBLEM TO BE SOLVED: To smoothly change a transmission installed between a drive shaft and an electric motor when an input limit is given to a battery accumulator such as a secondary battery and to suppress inconvenience that the electric motor rotates by unexpected high rotation when the transmission is changed. SOLUTION: When a torque command Tm2* of the motor is smaller than a value obtained by adding a threshold Tref to a torque limit Tmin which is set based on an input limit Win of a battery at the time of increasing a request torque Tr* requested from the drive shaft while a state of the transmission installed between the drive shaft and the motor is switched (S120 to S140), a rate ΔT where a value T2 smaller than a value T1 at usual time is set is added to the previous request torque Tr*, and the request torque Tr* of this time is set (160 and S170). A driving point of the engine and the torque commands Tm1* and Tm2* of the motor are set by using the request torque Tr* (S240 to S290). COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To smoothly perform shift of a transmission for shifting and transmitting power from an electric motor to a driving shaft even when negative driving force is outputted from the electric motor. SOLUTION: When the number of rotations Nm1 of a power generation motor usually driven as a generator becomes less than 0 and negative torque is outputted from a driving motor usually driven as an electric motor, target torque Te* of an engine is changed (S160) such that torque outputted from the engine to a ring gear shaft as a driving shaft through a planetary gear mechanism is coincident with requirement torque set based on acceleration operation of a driver. the target number of revolution Ne* of the engine is changed (S190) so as to become within a range of battery output limit Wout and switching processing of a gear of the transmission mounted to the driving motor is started (S200). As a result, since the torque outputted from the motor MG2 becomes a value 0, switching of the gear state of the transmission can be smoothly performed. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To enhance the efficiency of the whole construction of a device equipped with an internal-combustion engine which can output the power to a drive shaft and an electric motor connected with the drive shaft through a transmission. SOLUTION: When the engine 22 is in operation, the revolving speed of the motor is changed so that the efficiency of the whole vehicle becomes good in the condition that the engine 22 is operated, and the condition of the gears of the transmission is judged using a shift map to be used when running by the engine in which the shifting condition of the transmission to transmit the power to the drive shaft is set (S170). When the engine 22 is not in operation, the condition of the gears of the transmission is judged using a shift map to be used when running by the motor in which the shifting condition of the transmission is set so as to assure good efficiency of the whole vehicle (S200), followed by changing-over of the condition of the gears of the transmission (S220 and S230). Thereby, the efficiency of the whole vehicle can be enhanced. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To change the gear change ratio of a gear change transmission in which the transmission of the power from the rotary shaft of a motor to a drive shaft is performed at a changeable gear change ratio, more properly, by considering the charging/discharging power of an electric storage unit, such as a secondary battery, etc., or considering the drive state of the motor. SOLUTION: In a power output device, the output shaft of an engine is connected to the drive shaft coupled to an axle through a planetary gear mechanism, a generator is connected to the rotary element of the planetary gear mechanism, and the gear change of the transmission of the power output device in which the motor is connected to the drive shaft through the transmission is switched when a vehicle speed V, the required torque Tr* required to the drive shaft and the torque outputted from the motor to the power which charges and discharges the battery become near a value "0" at a positive side. Thus, the gear change of the transmission can be performed more properly. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To expand EV traveling in a hybrid vehicle considering the thermal load to electric components.SOLUTION: An ECU 15 contains a traveling mode control part 152, an Wout control part 154, and an engine startup/stop determination part 156. The traveling mode control part controls switching of traveling modes containing a CD mode that prioritizes traveling by stopping the engine and using only a motor generator, and a CS mode that maintains an SOC of the power storage device to a prescribed target by operating the engine. An engine start/stop determination part performs starting determination of the engine based on the dischargeable electric power which the power storage device shows the dischargeable electric power. The Wout control part changes the dischargeable electric power based on the traveling mode and working or stop of the engine.
Abstract:
PROBLEM TO BE SOLVED: To protect a first motor and its driving mechanism while taking torque required for a driving shaft and input/output restriction of an energy storage device into consideration, in an automobile provided with a planetary gear mechanism linked to an engine and to an output shaft and an drive shaft of the engine, a first motor linked to the other shaft of the planetary gear mechanism, and a second motor for inputting and outputting power to and from the drive shaft. SOLUTION: Engine rotation speed limits Nemax, Nemin are set for establishing compatibility between torque limit for suppressing output of torque unexpected to a driver to a drive shaft and input/output limits Win, Wout of the energy storage device (S130). Engine rotation speed limits Neh, Nel are set for preventing the first motor from being driven at a rotation speed near zero (S140). The rotation speed is set within a range of the rotation speed limits Nemax, Nemin and out of a range of the rotation speed Neh, Nel as a target rotation speed Ne* of an engine 22 (S150-S210). Thus, the engine and two motors are controlled. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To suppress variation of a damping force to be generated in gear change in a transmission attached on a rotating motor under regenerative control in breaking a vehicle, and to more smoothly perform gear change in the transmission. SOLUTION: When the transmission attached to a motor under regenerative control in damping is in a Hi gear position; a regenerative rate k for regenerating the motor using the kinetic energy of the vehicle as power is set at a value k2 smaller than a value k1 at which the transmission is in a Lo state (S170), and the motor and a hydraulic brake are controlled (S210-S250). Thus, since a torque for replacing the damping torque of the motor with a breaking torque Tb* is reduced in gear change in the transmission, variation in torque (variation in damping force) can be suppressed which may be generated in replacing the damping torque with the breaking torque Tb*, and the gear change in the transmission can be smoothly performed. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an A1-plated steel sheet formed with a resin film on its surface which is superior in resisting scoring in press processing into a fuel tank member and is superior in resisting corrosion against stored fuel and a method for producing a fuel tank using the same. SOLUTION: Alkali soluble resin is used for the resin film. For this resin urethane resin or acrylic resin which is soluble in alkali water solution of pH 9.0 or above, and has in its molecule carboxyl group or hydrogen atoms of a part displaced by 1-50% simultaneously with alkali metal, and whose acid value is between 40 and 90 is preferable. It is possible to add to the resin film synthetic resin powder 1-25 mass %, silica powder 1-30 mass %, and the film thickness is preferably 0.2-5.0 μm. For production, an A1-plated steel sheet formed with an alkali soluble resin film on its surface is press processed for forming the upper tank and the lower tank of a fuel tank member. Then both fuel tank members are washed with alkali solution for melting and removing the resin film. Then both members are joined and the surface is processed for painting.