Abstract:
PROBLEM TO BE SOLVED: To drive and control a generator in consideration of the shape of a power transmission member which transmits power from an internal combustion engine and the state of power transmission. SOLUTION: Limit torque Tmin1 for preventing slipping of a belt which transmits power from an engine to a starter MG is set base on the number Ne of engine revolutions and engine torque Te, and further minimum rated torque Tmin2 is set based on the number Nst of revolutions of the starter MG and a battery voltage V (S114, S116). The higher one (that of the lower absolute value) of the limit torque Tmin1 and the minimum rated torque Tmin2 is used as a lower limit guard when a generation torque command Tst* is set (S122) to drive and control the starter MG (S124), As a result, the transmission of power from the engine to the starter MG by the belt is more appropriately performed and further the durability is enhanced.
Abstract:
PROBLEM TO BE SOLVED: To prevent the overheating of a generator motor in a driving device equipped with an automatic transmission, an internal combustion engine and the generator motor. SOLUTION: The driving device 20 is provided with: a CVT 50 for performing a shift between an input shaft 51 and an output shaft 52; an engine 22 equipped with a crankshaft 24 connected to the input shaft 51; and a motor 40 equipped with a rotary shaft 41 connected to the input shaft 51. In this driving device 20, while the engine 22, the motor 40 and the CVT 50 are controlled so that the output shaft 52 can output target power and so that the motor 40 can output target electric power, the transmission gear ratio of the CVT 50 is changed according to the temperature of the motor 40, so that the temperature of the motor 40 can be prevented from exceeding an allowable critical temperature. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To improve fuel economy and responsiveness of driving force to be outputted to a drive shaft, and to suppress the occurrence of vibration or abnormal noise. SOLUTION: When request torque Tr* to be output to a drive shaft (ring gear shaft), when an accelerator is turned off exceeds a value 0, request torque Tr* is reduced by using a rate value Trt2 which is smaller than a rate value Trt1 (S160). A value calculated by subtracting a correction revolution speed ΔN, based on input/output restrictions Win, Wout of a battery 50 from the revolution speed, corresponding to a shift position SP or a speed V is set as a target revolution speed Ne* of an engine 22 (S170, S180). As a result, it is possible to suppress the discharge power of a battery from exceeding the output restriction Wout, and to suppress the occurrence of abnormal noise, such as, the rattling sounds of a gear, or vibration due to the rapid change of the torque of the drive shaft. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To suppress frequent start and stop of an internal combustion engine during a cold state in a power output device provided with the internal combustion engine capable of intermittently operate. SOLUTION: When power output from an engine is greater than set demand power due to high air density during cold state, engine speed is increased by a motor with throttle opening TH held to make power output from the engine agree with demand power (in embodiment, change from point A to point B). Consequently, battery charge by power larger than assumed power is suppressed and frequent stop and start of the engine caused by large fluctuation of battery remaining capacity (SOC) is suppressed. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To suppress a shock that can occur when demanded drive force required for a drive shaft in an accelerator-off state varies from a positive value to a negative value. SOLUTION: When an output limit Wout of a battery is smaller than a threshold Wref while an accelerator is off in a state in which an engine is operated, torque T* for working that is actual torque to be output to a drive shaft is gradually reduced (S220), while the engine is operated self-sustaindedly until the torque T* becomes within a range of the vicinity of zero (S160), and the engine is brought into fuel cut and engine speed is suddenly reduced when the torque T* reaches the range of the vicinity of zero (S180, S190), and a part of the variation of power due to the fuel cut is compensated by using inertia power caused by the sudden reduction in the engine speed. Thereby, the shock occurs when the torque output to the drive shaft from the positive value to the negative value may be suppressed. COPYRIGHT: (C)2008,JPO&INPIT
Abstract translation:要解决的问题:为了抑制在加速器断开状态下驱动轴所需的驱动力从正值向负值变化时可能发生的冲击。 解决方案:当在发动机运转的状态下,当加速器关闭时,当电池的输出限制Wout小于阈值Wref时,作为要被输出到驱动轴的实际转矩的作用力矩T * 逐渐减小(S220),而发动机自身运行直到转矩T *变为零附近(S160)为止,发动机进入燃油切断状态,发动机转速急剧下降时 T *达到零附近的范围(S180,S190),并且通过使用由发动机转速的急剧下降引起的惯性力来补偿由燃料切断引起的功率变化的一部分。 因此,可以抑制从正值向负值输出到驱动轴的转矩,从而发生冲击。 版权所有(C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To suppress a shock that can occur when demanded drive force required for a drive shaft in an accelerator-off state varies from a positive value to a negative value. SOLUTION: When an output limit Wout of a battery is smaller than a threshold Wref while an accelerator is off in a state in which an engine is operated, torque T* for working that is actual torque to be output to a drive shaft is gradually reduced (S200), while the engine is operated self-sustaindedly until a prescribed time elapses after the torque T* becomes lower than a value zero (S180), and the engine is brought into fuel cut when the prescribed time has elapsed (S130). Thereby, the shock which occurs due to a sudden change of the torque to be output to the drive shaft from a positive value to a negative value may be suppressed. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To suppress the generation of any torque shock before and after the start of an internal combustion engine. SOLUTION: In a vehicle with an engine, a first motor, a driving shaft and a second motor connected to a planetary gear mechanism, when an engine stops, an increasing rate ΔTr allowable for the increase of request torque Tr* requested to the driving shaft is set based on an output limitation Wout of a battery, and execution torque T* is set by limiting the request torque Tr* by the set increasing rate ΔTr (S150, S160), and the torque limitation Tmax of the second motor is set by dividing the output limitation Wout by the number of revolutions of the second motor, and the execution torque T* is output from the second motor by using the torque limitation Tmax as an upper limit (S260 to S290). Thus, it is possible to suppress the torque to be output to the driving shaft from falling by the torque limitation Tmax in the middle of the increase of the revolution of the driving shaft, and to suppress the generation of any torque shock before and after the start of the engine 22. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To suppress a shock when a brake is stepped on while a motor is still outputting creep torque, and also to improve energy efficiency. SOLUTION: When a brake is stepped on (S170) by a driver while the motor is still outputting the objective creep torque Tc* of specified torque T1 when the travel state is in a creep torque output permission range (S110 and S120), a vehicle continuously outputs the objective torque Tc* of specified torque T1 (S190, S300) regardless of brake ON. On the other hand, when it is shifted into the creep torque permission range (S110, S120, S170, S210) from outside the creep torque output permission range in condition that the brake is ON, the motor outputs the objective creep torque Tc* geared to the brake pedal position BP at the time of shifting into the creep torque output permission range (S220, S300). COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To improve the drivability of a hybrid car and its control method. SOLUTION: The operation point of an engine is set based on a request torque Tr* demanded for the driving shaft, and the primary delay number of rotation Ne1 is calculated, by calculating the primary delay processing to the temporary target number of rotation Netmp in a set operation point (S130), and the target number of rotation Ne* is set, by calculating the rate processing to the primary delay number of rotation Ne1 (S140, S150) by using a rate upper limit value Nrtma and a rate lower limit value Nrtmi, calculated by increasing/decreasing the previous target number of rotation change quantity ΔNe* of the engine only by a predetermined value α; and the engine is operated by the set target number of rotation Ne*, and an engine 22 and two motors are controlled so that the request torque Tr* can be outputted to the driving shaft. Thus, the number of rotations of the engine can be changed in the manner of a secondary curve, and an inertial system inertia torque, constituted of the engine and the first motor can be linearly changed, and shocks due to the inertia torque, can be suppressed. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To start an engine at more proper timing in a hybrid vehicle with an engine, a motor for outputting power for traveling, and a battery for supplying electric power to the motor. SOLUTION: Power P1 that can be used for traveling from a battery during traveling while stopping an engine and power P2 that can be used for traveling from a battery with engine motoring are calculated (Step S410). Surplus electric power Pmar of the battery is set to be smaller as output limit Wout as the maximum power that can be output from a battery becomes smaller (Step S420). A threshold value for starting Pstart is set based on the power subtracting the surplus electric power Pmar from the power P1 or the power P2 (Step S430). The engine is started when a request power requested for traveling is not less than the threshold value for starting Pstart. Thereby, the engine can be started at more proper timing. COPYRIGHT: (C)2010,JPO&INPIT