摘要:
Disclosed is a control device for a vehicle drive device whereby an improvement in vehicle response to accelerator operation by the driver can be achieved, in a vehicle equipped with an internal combustion engine, a supercharger and an automatic transmission. Gear ratio selection control means (80), when the engine (12) is operating in NA condition, if the engine (12) comes to operate in a supercharged condition on change of ratio of the automatic transmission (16) to a first gear ratio (³1at) in accordance with the gear-change map, performs gear ratio selection control so as to alter the method of selection of the gear ratio (³at) of the automatic transmission (16) in accordance with an increased rate (SPacc) of opening (Acc) of the accelerator. Specifically, in this gear ratio selection control, at the side where the increased rate (SPacc) of opening (Acc) of the accelerator is least, the automatic transmission (16) changes to a first gear ratio (³1at), but, at the side where the increased rate (SPacc) of degree of opening (Acc) of the accelerator is greatest, the engine (12) is still maintained in the aforementioned NA condition and the automatic transmission (16) is changed to a second gear ratio (³2at), which is larger than the first gear ratio (³1at).
摘要:
Electrical efficiency is improved by improving the motor operating point when there is a gear-shift request during deceleration/regeneration. A drivetrain from a drive source to drive wheel is provided with a motor-generator (MG) for implementing regeneration during deceleration and an automatic transmission (3) comprising an engaging clutch (8c) as a shifting element. The electric automobile comprises a gear-shift request assessment step (S1), a gear shifting permission assessment step (S4), and a shift initiation step (S5). In step (S1), an assessment is made as to whether a gear-shift request made during deceleration/regeneration is one in which a disengaging element or engaging element during a gear shift is the engaging clutch (8c). In step (S4), an assessment is made as to whether to grant gear shifting permission based on regeneration torque magnitude when an assessment indicates that the gear-shift request uses the engaging clutch (8c) as a disengaging element or engaging element. In step (S5), shifting is initiated according to the gear-shift request if a decision to grant gear shifting permission is made.
摘要:
A control device for continuously variable transmission includes an operating state detection means for detecting an operating state of a vehicle including a vehicle speed and an accelerator pedal opening, a control means for controlling a speed ratio of a continuously variable transmission based on the operating state, an acceleration request determination means for determining the presence or absence of an acceleration request of a driver based on the accelerator pedal opening, and a speed ratio setting means for setting a speed reduction ratio controlled by the control means to be smaller with an increase in an acceleration start vehicle speed if the accelerator pedal opening is equal during acceleration. The control means updates the acceleration start vehicle speed to a vehicle speed at the time of a determination after determining that the accelerator pedal opening has been increased during acceleration.
摘要:
In a gear shift indicator that instructs a driver to shift gears in a transmission (2000), setting means for setting a time until the driver starts to be instructed to shift sets that start time shorter when the gear after a shift ends is a lower gear than the gear before the shift starts and it is determined that there is a need for the driver to shift into a lower gear, than when another determination is made.
摘要:
The invention relates to a method for carrying out gear shifts from a source gear to a target gear of a twin clutch transmission, the twin clutch transmission comprising a plurality of gears distributed between two transmission input shafts. Sequentially directly successive gears are associated with different transmission input shafts, especially the first, third and/or fifth gears are associated with the first transmission input shaft and the second, fourth and/or sixth gears are associated with the second transmission input shaft. For each possible sequential gear change, respectively one upshifting threshold and downshifting threshold defined according to the position of the accelerator pedal, namely the limiting value for each upshifting or downshifting is stored in a control appliance as a corresponding vehicle speed value. When the motor vehicle is moving, varying vehicle speeds and the varying position of the accelerator pedal are measured. Indirect gearshifts are thus avoided by the fact that, in the event of a nominal downshifting from a source gear to a lower gear, the target gear is determined by first comparing the actual driving speed with the limiting value of the closest downshifting threshold or the adjacent downshifting threshold in said downshifting direction, until the actual driving speed is higher than the respective limiting value with the last checked downshifting threshold. Furthermore, when, for the last checked downshifting threshold, the higher gear of said downshifting threshold is associated with the same transmission input shaft as the source gear, the actual vehicle speed is then compared with the threshold value of the upshifting threshold corresponding to the last checked downshifting threshold, and then, when the actual vehicle speed is higher than the limiting value of the upshifting threshold, the higher gear of said upshifting threshold is selected as a target gear, but when the actual vehicle speed is lower than the limiting value of the upshifting threshold, the lower gear of said upshifting threshold is selected as a target gear.
摘要:
The invention relates to a method for carrying out gear shifts from a source gear to a target gear of a twin clutch transmission, the twin clutch transmission comprising a plurality of gears distributed between two transmission input shafts. Sequentially directly successive gears are associated with different transmission input shafts, especially the first, third and/or fifth gears are associated with the first transmission input shaft and the second, fourth and/or sixth gears are associated with the second transmission input shaft. For each possible sequential gear change, respectively one upshifting threshold and downshifting threshold defined according to the position of the accelerator pedal, namely the limiting value for each upshifting or downshifting is stored in a control appliance as a corresponding vehicle speed value. When the motor vehicle is moving, varying vehicle speeds and the varying position of the accelerator pedal are measured. Indirect gearshifts are thus avoided by the fact that, in the event of a nominal downshifting from a source gear to a lower gear, the target gear is determined by first comparing the actual driving speed with the limiting value of the closest downshifting threshold or the adjacent downshifting threshold in said downshifting direction, until the actual driving speed is higher than the respective limiting value with the last checked downshifting threshold. Furthermore, when, for the last checked downshifting threshold, the higher gear of said downshifting threshold is associated with the same transmission input shaft as the source gear, the actual vehicle speed is then compared with the threshold value of the upshifting threshold corresponding to the last checked downshifting threshold, and then, when the actual vehicle speed is higher than the limiting value of the upshifting threshold, the higher gear of said upshifting threshold is selected as a target gear, but when the actual vehicle speed is lower than the limiting value of the upshifting threshold, the lower gear of said upshifting threshold is selected as a target gear.