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US 10,280,997 B2Granted
Method for controlling a hydrodynamic retarder that can be mechanically disengaged by a disconnect clutch
AssigneeVoith Patent GmbH
InventorsWerner Adams, Dieter Laukemann, Achim Menne, Ravi Schade
Life of this patent
Estimating the term…
Abstract
A method for controlling a hydrodynamic retarder in a motor vehicle that can be mechanically disengaged via a disconnect clutch, whereby at least one of the rotational speed of a revolving bladed rotor and the speed of a motor vehicle is monitored and a disconnect clutch is engaged below at least one of a pre-specified rotational speed of the revolving bladed rotor and a pre-specified speed of the motor vehicle, regardless of a request made by a driver assist system or by operation of an input device by the operator of the motor vehicle to turn on the hydrodynamic retarder.
Claims15
A method for controlling a hydrodynamic retarder in a motor vehicle that can be mechanically disengaged via a disconnect clutch, comprising:
- a revolving bladed rotor;
- a bladed stator;
- and
- a working chamber formed by the revolving bladed rotor and the bladed stator;
- wherein the working chamber is filled with a working medium in a braking mode and drained of the working medium in a non-braking mode;
- wherein the revolving bladed rotor is driven in the braking mode via a drive train with the disconnect clutch engaged;
- wherein during a first transition from the braking mode to the non-braking mode, the working chamber is drained and the disconnect clutch is disengaged;
- wherein the first transition from the braking mode to the non-braking mode is initiated by a first request made by a driver assist system or by operation of an input device by an operator of the motor vehicle for the hydrodynamic retarder to be switched off;
- and
- wherein a second transition from the non-braking mode to the braking mode is initiated by a second request made by the driver assist system or by operation of the input device by the operator of the motor vehicle for the hydrodynamic retarder to be switched on;
- whereby at least one of a rotational speed of the revolving bladed rotor and a speed of the motor vehicle is monitored and the disconnect clutch is engaged below at least one of a pre-specified rotational speed of the revolving bladed rotor and a pre-specified speed of the motor vehicle, regardless of the second request made by the driver assist system or by operation of the input device by the operator of the motor vehicle to turn on the hydrodynamic retarder.
8 more elements
A method for controlling a hydrodynamic retarder in a motor vehicle that can be mechanically disengaged via a disconnect clutch, comprising:
- a revolving bladed rotor;
- a bladed counter-rotating rotor;
- and
- a working chamber formed by the revolving bladed rotor and the bladed counter-rotating rotor;
- wherein the working chamber is filled with a working medium in a braking mode and drained of the working medium in a non-braking mode;
- wherein the bladed counter-rotating rotor is driven in the braking mode via a drive train with the disconnect clutch engaged;
- wherein during a first transition from the braking mode to the non-braking mode, the working chamber is drained and the disconnect clutch is disengaged;
- wherein the first transition from the braking mode to the non-braking mode is initiated by a first request made by a driver assist system or by operation of an input device by an operator of the motor vehicle for the hydrodynamic retarder to be switched off;
- and
- wherein a second transition from the non-braking mode to the braking mode is initiated by a second request made by the driver assist system or by operation of the input device by the operator of the motor vehicle for the hydrodynamic retarder to be switched on;
- whereby at least one of a rotational speed of the revolving bladed rotor and the bladed counter-rotating rotor and a speed of the motor vehicle is monitored and the disconnect clutch is engaged below at least one of a pre-specified rotational speed of the revolving bladed rotor and a pre-specified speed of the bladed counter-rotating rotor and a pre-specified speed of the motor vehicle, regardless of the second request made by the driver assist system or by operation of the input device by the operator of the motor vehicle to turn on the hydrodynamic retarder.
8 more elements
A method for controlling a hydrodynamic retarder in a motor vehicle that can be mechanically disengaged via a disconnect clutch, comprising:
- a revolving bladed rotor;
- a bladed stator;
- and
- a working chamber formed by the revolving bladed rotor and the bladed stator;
- wherein the working chamber is filled with a working medium in a braking mode and drained of the working medium in a non-braking mode;
- wherein the revolving bladed rotor is driven in the braking mode via a drive train with the disconnect clutch engaged;
- wherein during a first transition from the braking mode to the non-braking mode, the working chamber is drained and the disconnect clutch is disengaged;
- wherein the first transition from the braking mode to the non-braking mode is initiated by a first request made by a driver assist system or by operation of an input device by an operator of the motor vehicle for the hydrodynamic retarder to be switched off;
- and
- wherein a second transition from the non-braking mode to the braking mode is initiated by a second request made by the driver assist system or by operation of the input device by the operator of the motor vehicle for the hydrodynamic retarder to be switched on;
- whereby regardless of the second request made by the driver assist system or by operation of the input device by the operator of the motor vehicle to turn on the hydrodynamic retarder, the disconnect clutch is engaged at the beginning of a start-up process of the motor vehicle if during a standstill of the motor vehicle the working chamber is filled with the working medium.
8 more elements
A method for controlling a hydrodynamic retarder in a motor vehicle that can be mechanically disengaged via a disconnect clutch, comprising:
- a revolving bladed rotor;
- a bladed counter-rotating rotor;
- and
- a working chamber formed by the revolving bladed rotor and the bladed counter-rotating rotor;
- wherein the working chamber is filled with a working medium in a braking mode and drained of the working medium in a non-braking mode;
- wherein the bladed counter-rotating rotor is driven in the braking mode via a drive train with the disconnect clutch engaged;
- wherein during a first transition from the braking mode to the non-braking mode, the working chamber is drained and the disconnect clutch is disengaged;
- wherein the first transition from the braking mode to the non-braking mode is initiated by a first request made by a driver assist system or by operation of an input device by an operator of the motor vehicle for the hydrodynamic retarder to be switched off;
- and
- wherein a second transition from the non-braking mode to the braking mode is initiated by a second request made by the driver assist system or by operation of the input device by the operator of the motor vehicle for the hydrodynamic retarder to be switched on;
- whereby regardless of the second request made by the driver assist system or by operation of the input device by the operator of the motor vehicle to turn on the hydrodynamic retarder, the disconnect clutch is engaged at the beginning of a start-up process of the motor vehicle if during a standstill of the motor vehicle the working chamber is filled with the working medium.
8 more elements
Dependencies are inferred from the claim text.