摘要:
A vehicle (12) such as an earthmoving wheel loader has an engine (14), a torque converter (20) having an impeller element (22), a reactor element (24) and a turbine element (28), and an input clutch (64) connected between the engine (14) and the impeller element (22). An electrohydraulic control device (76) is provided to controllably engage the input clutch (64) and that includes a microprocessor-based electronic control module (78), an actuator mechanism (120) having a control member (122) that is progressively movable between first, second and third positions to deliver a first electrical signal to the electronic control module (78), and a valve (170) for directing fluid to the input clutch (64) at a decreasing pressure level when the control member (122) is moved from the first to the second positions in response to another signal from the electronic control module (78). The electronic control module (78) is programmed to maintain at least a minimal pressure level to the actuating piston (68) of the input clutch (64) when the control member (122) is between the second and third positions. Moreover, a service brake (150, 152) is increasingly engaged by a service brake mechanism (128) in response to the control member (122) moving between the second and third positions. Other logic functions are included to control the input clutch (64) and a lockup clutch (66) connected between the engine (14) and the turbine element (28).
摘要:
The present invention relates to a method for controlling an operation of a multi-clutch transmission (100) operatively connected to a prime mover of a vehicle. The multi-clutch transmission (100) includes a dual-clutch assembly (10), a clutch input shaft (20) drivingly connected to the prime mover and a transmission output shaft (30).The dual-clutch assembly (10) is provided with a first clutch (12) and a second clutch (14) operatively connected to the clutch input shaft (20) and configured for transmitting a rotational torque of the clutch input shaft (M cis ); the first clutch (12) is operatively connected with a first input shaft (42) of a first sub-transmission (40) having a first set of gears (70), the first clutch (12) is transmitting a first rotational torque portion (Μ 1 ) of the rotational torque of the clutch input shaft (M cis ) to the first input shaft (42); the second clutch (14) is operatively connected with a second input shaft (52) of a second sub-transmission (50) having a second set of gears (80), the second clutch (14) is transmitting a second rotational torque portion (M 2 ) of the rotational torque of the clutch input shaft (M cis ) to the second input shaft (52), the method comprising the steps of: (a) engaging the first clutch (12), or the first clutch (12) and the second clutch (14), at a launch of the vehicle for transmitting a rotational torque (M output ) to the transmission output shaft (30) while a rotational speed of the first input shaft (42) is different from a rotational speed of the clutch input shaft (20); and (b) decreasing the initial amount of the first rotational torque portion (M 1 ) to a decreased amount and increasing the initial amount of the second rotational torque portion (M 2 ) to an increased amount while the rotational speed of the first input shaft (42) is different from the rotational speed of the clutch input shaft (20). The present invention also relates to a control unit (60) for a vehicle configured for implementing a method for controlling the operation of the multi-clutch transmission (100).
摘要:
The invention relates to a motor vehicle with an automatic clutch and a gearbox activated on the driver side. The clutch opens automatically when the engine speed falls short of a relatively low minimum engine speed. In certain driving conditions, in particular in the event of great differences in speed between driven and non-driven vehicle wheels, this minimum engine speed is increased.
摘要:
A hybrid vehicle capable of selecting between a state where a clutch coupling an engine and a motor is engaged and the vehicle travels by drive power of the engine, and a state where the clutch is released and the vehicle travels with the engine stopped, wherein, if there is a request to restart the engine while the engine is rotating (step S5) after control to release the clutch and stop the engine has been started, then upon the condition that the engine number of revolutions is equal to or greater than a predetermined threshold value (step S6), and in a state where the output torque of the motor is limited to a previously established torque or less (step S7), control to increase the transmission torque capacity of; the clutch is implemented (step S8), whereupon the output torque of the motor is increased to a torque that cranks the engine (step S9).
摘要:
Die Erfindung betrifft einen hybridischen Antriebsstrang (1) und ein Verfahren zur Steuerung einer Reibungskupplung (4) eines hybridischen Antriebsstrangs (1) eines Kraftfahrzeugs mit einer mittels eines Freilaufs (10) mit einer Getriebeeingangswelle (3) eines Getriebes zur Übertragung des Motormoments gekoppelten Brennkraftmaschine und einer die Brennkraftmaschine startenden und/oder das Kraftfahrzeug antreibenden Elektromaschine (5), welche Reibungskupplung (4) ein aus einem Anlassmoment zum Start der Brennkraftmaschine mittels der Elektromaschine (5) und einem auf die Brennkraftmaschine (5) wirkenden Schubmoment im Schubbetrieb des Antriebsstrangs (1) gebildetes Summenmoment auf die Brennkraftmaschine überträgt. Um die Reibungskupplung (4) sicher betreiben zu können und eine Überdimensionierung der Reibungskupplung (4) infolge hoher Summenmomente zu vermeiden, wird ein an der Reibungskupplung (4) anliegendes Moment auf ein vorgegebenes, über die Reibungskupplung übertragbares Übertragungsmoment begrenzt.
摘要:
Die Erfindung betrifft ein Verfahren zur Steuerung eines Doppelkupplungsgetriebes (10). Wenn das in einem ersten Getriebepfad (C1, E2, Z8, Z9, S2, Z3, Z4) übertragene Drehmoment eine durch die Drehmoment-Übertragungskapazität dieses Pfades gegebene Obergrenze erreicht, wird durch ein Schließen der zweiten Kupplung (C2) weiteres an der Antriebswelle (I) von einem Motor bereitgestelltes Zusatzdrehmoment parallel über einen zweiten Getriebepfad (C2, EI, Zl, Z2, Sl, Z3, Z4) an die Ausgangswelle (O) übertragen. Hierdurch kann die Leistungsfähigkeit des Motors besser ausgenutzt und ein besseres Fahrverhalten erreicht werden.