摘要:
The invention concerns a method for controlling a motor vehicle (2) with an automatic transmission (6) and an automated clutch (8), with a control unit (20), a drive or accelerator pedal (32), an element (30) for determining the position of the drive or accelerator pedal, and an actuating device (28) for selecting an operating mode of the motor vehicle (2). According to the invention, when the actuating means (28) is operated the position of the drive or accelerator pedal (32) is noted or evaluated, and actuation of the clutch (8) is prevented until a change in the position of the drive or accelerator pedal is recognized.
摘要:
A lock-up clutch of a hydrodynamic torque converter remains disengaged during shifts of a downstream transmission, when the drive motor is operated in the partial load range, and remains engaged during shifts of the downstream transmission, when drive motor is operated in a full load range.
摘要:
A method for controlling selection of an automatic transmission gear ratio with staged ratios or constant variation for a vehicle including a control for preventing/allowing extension of the gear ratio or for controlling a shortening the transmission gear ratio if, at a current engine speed, the power is insufficient for maintaining the vehicle speed. The method prevents extension of the transmission gear ratio if the power available after the extension is insufficient for maintaining the vehicle speed; otherwise allowing extension of the transmission gear ratio.
摘要:
A device for controlling an engine equipped with a synchronous mesh-type automatic transmission which decreases shock at the time of changing the speed, and improves the response and drive feeling at the time of changing the speed, including a controller that controls a throttle actuator and the automatic transmission, sets a synchronizing rotational speed of the engine rotational speed relative to the clutch when the clutch is disconnected at the time of changing the speed, fixes the throttle opening degree so that the engine rotational speed converges to the synchronizing rotational speed, gradually returns the throttle opening degree to an opening degree that corresponds to the synchronizing rotational speed when a difference between the engine rotational speed and the synchronizing rotational speed has converged to lie within a first predetermined range, and connects the clutch again when the direction of change of the engine rotational speed is inverted.
摘要:
A vehicle clutch control system that can prevent an engine (222) from racing when a friction clutch (304) is disengaged and engaged. When a driver stamps an accelerator pedal (206) over a predetermined depth at the time of completion of transmission gear speed change, clutch engagement is prohibited if a clutch rotation speed is slower than a prescribed speed, or an accelerator is maintained to a 0% opening position.
摘要:
Transmission and engine control means for a vehicle wherein the engine is connected through at least one friction clutch to a transmission having a positively geared power train therethrough. A low speed governor is provided to sense an engine speed at or shortly below idling speed and functions to increase fuel supply to the engine as same is lugged down for maintaining, within the capacity of the engine, at least said selected minimum speed. Further, means are provided responsive to the position of the throttle control, such as the accelerator pedal, for modulating the engagement pressure of said clutch in response to the position of such throttle control, progressive opening of the throttle effecting progressive increase in the torque transmitting capacity of the clutch, whereby the torque transmitting capacity of the clutch is under all throttle settings maintained at a value a little greater than the load torque normally applied thereto at such throttle setting. If desired, further means may be provided for deactivating and disengaging said transmission clutches entirely when the throttle is in its idling position and the vehicle is either at standstill or at a speed below a selected value.
摘要:
A torque converter (1) connecting an engine (14) and a transmission (15) of a vehicle is provided with a lockup clutch (2), and a controller (5) is programmed to increase an engagement force of a lockup clutch (2) under open loop control before shifting to feedback control of the engaging force using a target slip rotation speed. When an engine output torque rapidly decreases during open loop control (S59, S60), the controller (5) decreases the engaging force according to a variation amount of the engine output torque (S61, S65), thereby preventing an unintentional sudden engagement of the lockup clutch (2) due to decrease in the engine output torque.
摘要:
A method for controlling selection of an automatic transmission gear ratio with staged ratios or constant variation for a vehicle including a control for preventing/allowing extension of the gear ratio or for controlling a shortening the transmission gear ratio if, at a current engine speed, the power is insufficient for maintaining the vehicle speed. The method prevents extension of the transmission gear ratio if the power available after the extension is insufficient for maintaining the vehicle speed; otherwise allowing extension of the transmission gear ratio.
摘要:
An oil pressure control apparatus for an automatic transmission includes a calculating means for calculating, on the basis of a transmission output shaft rotational speed, at a time of a shift operation from a neutral shift stage to another shift stage appropriate to a vehicle driving condition, output-side rotational speeds of frictional engagement elements, and a shift stage selecting means for selecting a shift stage, in which oil with line pressure is supplied to a first frictional engagement element, from among the frictional engagement elements, and in which a minimum difference exists between the output-side rotational speed of the first frictional engagement element and an input-side rotational speed of a second frictional engagement element, from among the plural frictional engagement elements. The second frictional engagement element corresponds to the first frictional engagement element for the shift stage selected by the shift stage selecting means.
摘要:
A torque converter (1) connecting an engine (14) and a transmission (15) of a vehicle is provided with a lockup clutch (2), and a controller (5) is programmed to increase an engagement force of a lockup clutch (2) under open loop control before shifting to feedback control of the engaging force using a target slip rotation speed. When an engine output torque rapidly decreases during open loop control (S59, S60), the controller (5) decreases the engaging force according to a variation amount of the engine output torque (S61, S65), thereby preventing an unintentional sudden engagement of the lockup clutch (2) due to decrease in the engine output torque.