摘要:
The present invention relates to a shift control device for a hybrid vehicle comprising: a differential mechanism (2) including at least four rotating elements (Ss,Rd,C,Rs,Sd) whose rotating states are determined by rotating states of two of the at least four rotating elements, wherein said rotating elements connect a driving source (Engine), two motor/generators (MG1,MG2) and an output (OUT); and a controller programmed to: calculate a target driving power (Po * ) based on a driving condition; calculate a driving source speed (Ne γ) and a driving source torque (Te γ) under optimum fuel efficiency wherein the target driving power (Po * ) is realized; calculate a first motor/generator torque (T1) and a second motor/generator torque (T2) based on the driving source speed (Ne γ), the driving source torque (Te γ), a current output speed (No) and the target driving power (Po * ); make a first judgment as to whether both the first motor/generator torque (T1) is larger than a first motor/generator maximum torque (T1 max ) and the second motor/generator torque (T2) is larger than a second motor/generator maximum torque (T2 max ); when the first judgment shows at least one of the first and second motor/generator torques (T1,T2) being larger than the respective first and second motor/generator maximum torques (T1 max ,T2 max ), decrease the first driving source speed (Ne γ) until both of the first and second motor/generator torques (T1,T2) are equal to or smaller than the first and second motor/generator maximum torques (T1 max ,T2 max ), and a corresponding shift control method for a hybrid vehicle.
摘要:
A drive device of a vehicle includes a motor generator, a lubricant circulating mechanism lubricating and cooling the motor generator, a power control unit controlling the motor generator, arranged on a circulation path of a lubricating oil and being in contact with the lubricating oil for transferring and receiving a heat to and from the lubricating oil, and a casing accommodating the motor generator, the lubricating mechanism and the power control mechanism, and provided with the circulation path. Preferably, the power control unit includes a power control element and a board (120) having a first main surface on which the power control element is mounted. The board (120) is provided on its second main surface side with a radiator fin (390, 392 and 394) for contact with the lubricating oil in the circulation path.
摘要:
The invention essentially relates to a method of controlling a device (1) for the transmission of power between a shaft (2) of a heat engine (3) and an axle shaft (4). The inventive method involves the use of two electrical machines (6, 7), namely a first machine having a rotation speed WA and a torque CA and a second machine having a rotation speed WB and a torque CB. A coupling device (11) comprises an electric controller (27) which produces set point signals RefCA and RefCB for controlling the inverters (12, 13). According to the invention, in order to produce set point signals RefCA and RefCB, an electric reference signal RefELEC corresponding to CA*WA+CB*WB and a mechanical reference signal RefMECA corresponding to CA*WB-CB*W A are applied at the inputs of the control device.
摘要:
The gear noise reduction measures is simplified as well as the optional setting alteration of the total gear ratio on the engine side is enabled without altering the mutual positions between axes. A hybrid drive apparatus is formed from an engine (E/G), a generator (G), a differential gear mechanism (P) linking the above two, an electric motor (M), and a differential apparatus (D). The power transmission system on the side of the engine that links the differential apparatus (D) with the output element of the differential gear mechanism (P) and the power transmission system on the side of the electric motor that links the differential apparatus (D) with the electric motor (M) are each formed from separate power transmission elements and are each linked to the differential apparatus (D) at the most downstream point of the power transmission system of each. As a result, it is possible to arbitrarily alter the setting of the total gear ratio on the engine side simply by altering the meshing diameter of the power transmission elements without altering the mutual positions between the axes of the engine (E/G), electric motor (M), and differential apparatus (D). Moreover, the implementing of measures against noise is simplified because the upstream side of the power transmission system that has a high probability of being the one generating problem noise is formed separately.
摘要:
A composite power transmission mechanism (10) formed by the combination of a planetary gear portion (15) and a differential planetary mechanism (16), wherein a planetary gear is connected to a vehicle drive shaft (14) and the other three gears rotate a motor (12), a motor (13), and a shaft of an engine (11), respectively, whereby, because the vehicle drive shaft is rotated by the planetary gear of the composite power transmission mechanism, and the rotation of the planetary gear can be transmitted from those of their respective drive sources, i.e., the motor (12), motor (13), and engine (11) by a single engagement of these gears, a mechanical loss depending on the number of engagement of gears can be suppressed to a minimum.
摘要:
In a hybrid vehicle drive system, an output shaft (2) of an internal combustion engine is connected to a first motor generator (MG1) and a wheel drive shaft through a power distribution mechanism, and the wheel drive shaft is connected to a second motor generator (MG2). The hybrid vehicle drive system is provided with a device that increases the torque of the wheel drive shaft separately from the second motor generator when the internal combustion engine is cranked by the first motor generator.
摘要:
There is provided a method of operating a hybrid-vehicle drive system in which an internal combustion engine (1), a first electric motor (8) and a second electric motor (12) are combined to provide a driving source for a hybrid vehicle, wherein an output shaft (2) of the internal combustion engine (1) and the first electric motor (8) are connected via a power distribution mechanism (3) to a wheel drive shaft (11), the wheel drive shaft (11) is connected via a connecting portion (16) to the second electric motor (12), and a transmission (100) is provided on at least one of the wheel drive shaft (11) and the connecting portion (16) of the second electric motor (12) with the wheel drive shaft (11). The method comprises the step of changing a ratio of a first torque produced at vehicle axles by the internal combustion engine (1) to a second torque produced at the vehicle axles by the second electric motor (12) at each gear position of the transmission (100) from a first ratio of the first torque to the second torque when both of the internal combustion engine and the second electric motor operate normally to a second ratio of the first torque to the second torque when one of the internal combustion engine and the second electric motor is faulty.
摘要:
An altitude calculation unit 44 estimates an inclination of a road from vehicle speed and vehicle drive torque, and calculates altitude of a vehicle. A battery management unit 43 calculate difference between average altitude determined from the past altitude history and the present altitude and varies a target value of battery charging rate or upper and lower limit values thereof in response to the difference. Charging and discharging command value is calculated in response to difference between charging rate detection value and the target value or the upper and lower limit values. An integrated control unit 22 sets output share between an engine and a motor based on vehicle target drive torque calculated by a target toque determination unit 21 and charging and discharging command from the battery management unit 43, determines an optimum operation point of the engine and issues a control command to the engine and the motor. Thereby, even when a travelling route ahead of the vehicle is not set, a possible prevention of regenerative braking due to full charging during downhill rolling is avoided and a fuel economy for a hybrid vehicle is improved in total.
摘要:
There is provided a method of operating a hybrid-vehicle drive system in which an internal combustion engine (1), a first electric motor (8) and a second electric motor (12) are combined to provide a driving source for a hybrid vehicle, wherein an output shaft (2) of the internal combustion engine (1) and the first electric motor (8) are connected via a power distribution mechanism (3) to a wheel drive shaft (11), a transmission (100) having a plurality of gear positions is provided on the wheel drive shaft (11), and the wheel drive shaft (11) is connected via a connecting portion (16) to the second electric motor (12). The method comprises steps of: setting a gear position of the transmission (100) to a first gear position having a predetermined high-speed gear ratio as a first gear ratio, and maintaining the transmission in the first gear position irrespective of changes in a vehicle speed, as long as the hybrid-vehicle drive system is able to provide a required value of a torque at vehicle axles while the internal combustion engine (1) is operated at a high fuel efficiency.