摘要:
A method for controlling disengagement of an automated clutch (3) in a vehicle (1) . A decrease of a first engine rotational speed limit, at which the clutch (3) is disengaged, is initiated upon sensing: -travel of the vehicle (1) in a down slope; -zero displacement of the throttle control (13) . Said first engine rotational speed limit is decreased to a speed where an, in the vehicle arranged, engine idle speed regulator (20) injects an amount of fuel corresponding to a positive engine torque which equals current retarding negative engine torque so that total output torque from the engine (2) is approximately zero. The vehicle accelerating effect due to engine braking torque drop out when the clutch is disengaged will be eliminated.
摘要:
A method for controlling disengagement of an automated clutch (3) in a vehicle (1) . A decrease of a first engine rotational speed limit, at which the clutch (3) is disengaged, is initiated upon sensing: -travel of the vehicle (1) in a down slope; -zero displacement of the throttle control (13) . Said first engine rotational speed limit is decreased to a speed where an, in the vehicle arranged, engine idle speed regulator (20) injects an amount of fuel corresponding to a positive engine torque which equals current retarding negative engine torque so that total output torque from the engine (2) is approximately zero. The vehicle accelerating effect due to engine braking torque drop out when the clutch is disengaged will be eliminated.
摘要:
A method for controlling clutch (130) disengagement in a vehicle having an automated manual transmission comprising an electronically controlled clutch (130) is characterized by the following steps: 1. sensing at least two brake pedal (150) positions separated in time, 2. performing a differentiation of the sensed brake pedal (150) positions, 3. comparing the result of the differentiation to a first predetermined threshold value, and 4. controlling the clutch (130) to disengage if the result of the differentiation represents a faster brake pedal (150) application than a predetermined threshold value.
摘要:
Drivetrain for a motor vehicle comprising an engine (1), a gearbox (9) having an intermediate shaft (11) with intermediate shaft brake (17) and a friction clutch (3) coupled between the engine and the gearbox. A torque sensor (19) is provided, which detects the input torque to the gearbox. The intermediate shaft brake and the clutch are controlled by a control unit (12), which is programmed in predetermined instances, when the gearbox is in the neutral position, the clutch is engaged and the intermediate shaft brake is released, to measure and store the torque loss from the gearbox and then to set the brake to a predetermined level and to register and store the torque increase during the setting until constant torque is attained. This is registered and stored in the control unit together with the time for the torque increase. The control unit is programmed to then deactivate the brake and to register and store the torque reduction during deactivation down to the torque loss and the time taken for this.
摘要:
Method and device for controlling the position of an automatic disk clutch (3) as a function of the position of a throttle lever (48, 49) arranged in the vehicle, the method being employed when starting the vehicle from stationary or virtually from stationary, in which the primary function of the disk clutch (3) is to transmit motive force from an internal combustion engine (1) arranged in a vehicle to an input shaft (7 ) of a stagegeared gearbox (9). The position (48, 49) of the disk clutch is also controlled as a function of at least one of the parameters: vehicle weight, tractive resistance of the vehicle and the selected transmission ratio between the gearbox input shaft and the driving wheels of the vehicle.
摘要:
An automatic gearshifting process and/or disengagement process of a coupling-dependent power take off (32) for a vehicle with the power take off (32) engaged and when the vehicle is in motion. The power tapping at the power take off (32) is minimized before a gearshift and/or disengagement of the claw clutch of the power take off (32) takes place. One advantage is that gearshifting can be realized with engaged coupling-dependent power take off (32). Comfort is increased and coupling teeth wear is minimized, whilst, at the same time, a gear and the claw clutch of the power take off are able to be securely disengaged.
摘要:
A method for sensing leakage in a clutch cylinder (110) system in a vehicle comprising an automated manual transmission, wherein the clutch cylinder system comprises a clutch cylinder (110) provided with a reciprocable piston (115), whose position is sensed by a position sensor (140) and affected by pressurization of said cylinder (110) by opening or closing at least one air inlet valve (Vl, V2) and by opening or closing at least one air outlet valve (V3, V4) and wherein the clutch is in an engaged position when there is no air pressure in said cylinder is characterized by the steps of : a. closing said at least one inlet valve (Vl;V2) and at least one outlet valve (V3; V4) for compressed air; b. sensing a position of said piston (115) during a predetermined time span, and, c. if the position has changed more than a predetermined allowable position change, sending an error signal to an onboard diagnostics system or a signal light in the vehicle.
摘要:
Method and arrangement for adjusting shift characteristics of a transmission of a heavy vehicle. A heavy vehicle is operated and that is powered by an internal combustion engine equipped with an automated manual transmission and a power take off. The power take off, when operating, imposes a torque-consuming load on the engine. Operation of the power take off is detected when the engine of the vehicle is in a power mode. At least one gear-shift event is adapted to occur at a higher engine speed when power take off operation is detected than when power take off operation is not detected. The gear-shift event is affected at an engine speed that is approximately five to twenty-five percent higher than when power take off operation is not detected. The gear-shift event may be an up-shift to a lower ratio gear engagement or a down-shift to a higher ratio gear engagement.
摘要:
Method and a control unit (45) for controlling the position of an automatic disc clutch (3) in a vehicle, which disc clutch (3) is arranged to transmit motive force from an internal combustion engine (1) to an input shaft (7) of a stagegeared gearbox (9) in the vehicle, said control unit being arranged to position said clutch in a first position (PosRF) / preparing the vehicle for take off, with the gearbox having a starting gear engaged, and where the clutch in said first position transmits a smaller torque, characterized in that said control unit being further arranged to position said clutch in a second more disengaged position (P0S2) compared to said first position, if a driver of the vehicle does not demand vehicle take off torque by activating a throttle control (49) within a predetermined time.
摘要:
Method and device for controlling a clutch (3) in a vehicle comprising as long as the displacement of a throttle control (13) remains within a preselected throttle control creep speed range or a brake control (9) remains within a preselected brake control creep speed range, and a first displaced position is selected within one of said ranges, said first displaced position corresponding to a first vehicle creep speed, a control unit (10, 12, 14, 16) maintains said first vehicle creep speed by controlling at least one of brake actuator, engine and clutch actuator as long as the throttle control or the brake control remains substantially in said first displaced position.