Method for controlling and/or regulating the braking torque in a drive train, and control and regulating system
First Claim
1. A method for controlling and/or regulating drag torque in a drive train comprising an internal-combustion drive engine, and a gearbox unit having an input and and output, the gearbox unit coupled to the engine, and a regulatable clutch between the gearbox input and output, the drive train drive side coupled at least indirectly to the gearbox input and, as seen in the direction of power transmission during traction operation, the drive train output side coupled, at least indirectly, to the gearbox output;
- said method comprising;
during drag operation mode, transmitting by the regulatable clutch power introduced by wheels of the drive train into the drive train;
resulting torque transmitted by the regulatable clutch being controlled and regulated such that the engine coupled to the gearbox is operated at a rotational speed nengine-target, that is equal to or greater than the engine idling speed nidling;
the regulatable clutch being a hydrodynamic clutch with an assigned bypass clutch for a mechanical bypass between the drive side and output side of the hydrodynamic clutch, the hydrodynamic clutch and the bypass clutch being engageable in parallel operation; and
controlling the torque transmitted by the hydrodynamic clutch by changing the filling ratio thereof.
1 Assignment
0 Petitions
Accused Products
Abstract
The aim of the invention is to regulate the braking torque in a drive train comprising an internal combustion engine (2) and a gearbox unit (3) which can be coupled to the same, using a regulatable clutch (5). To this end, the power introduced by the wheels into the drive train of the vehicle is transmitted via the regulatable clutch (5), in the overrun condition. The torque which can be transferred via the regulatable hydrodynamic clutch is controlled or regulated in such a way that the drive motor connected to the gearbox unit is operated at a rotational speed nm-soil which is equal to or larger than the idling rotational speed nLeerlauf.
-
Citations
24 Claims
-
1. A method for controlling and/or regulating drag torque in a drive train comprising an internal-combustion drive engine, and a gearbox unit having an input and and output, the gearbox unit coupled to the engine, and a regulatable clutch between the gearbox input and output, the drive train drive side coupled at least indirectly to the gearbox input and, as seen in the direction of power transmission during traction operation, the drive train output side coupled, at least indirectly, to the gearbox output;
- said method comprising;
during drag operation mode, transmitting by the regulatable clutch power introduced by wheels of the drive train into the drive train; resulting torque transmitted by the regulatable clutch being controlled and regulated such that the engine coupled to the gearbox is operated at a rotational speed nengine-target, that is equal to or greater than the engine idling speed nidling; the regulatable clutch being a hydrodynamic clutch with an assigned bypass clutch for a mechanical bypass between the drive side and output side of the hydrodynamic clutch, the hydrodynamic clutch and the bypass clutch being engageable in parallel operation; and controlling the torque transmitted by the hydrodynamic clutch by changing the filling ratio thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- said method comprising;
-
11. A control and regulation system for setting drag torque in a drive train, comprising:
-
an internal combustion engine; a gearbox unit coupled to the engine and having an input and an output; a regulatable clutch in the form of a hydrodynamic clutch between the gearbox input and output, the drive train drive side coupled at least indirectly to the gearbox unit and, as seen in the direction of power transmission during traction operation, the drive train output side coupled, at least indirectly, to the gearbox output; means for controlling and regulating torque transmitted by the hydrodynamic clutch such that the engine is operated at a rotational speed nengine-target that is equal to or greater than the engine idling speed nengine-idling, said means for controlling comprising a means for changing the filling ratio of said hydrodynamic clutch; a mechanical bypass clutch assigned to said hydrodynamic clutch to thereby provide a mechanical bypass between a drive side and an output side of the hydrodynamic clutch; said bypass clutch and said hydrodynamic clutch being engageable in parallel operation. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
-
Specification