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US 12,595,845 B2Granted
Driveline including a hydrodynamic retarder and method of operating a hydrodynamic retarder
AssigneeDana Belgium N.V.
InventorsChristophe Debuyser, Kevin Vyncke
Life of this patent
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Abstract
The present document relates to a driveline for a vehicle, the driveline comprising a hydrodynamic retarder, a first driveline component such as a transmission input, and a controller configured to activate the hydrodynamic retarder at a point in time which is determined based on a rotational acceleration of the first driveline component. The present document further relates to a method of controlling a hydrodynamic retarder.
Claims18
A method of operating a hydrodynamic retarder for a vehicle, the method comprising:
- activating the hydrodynamic retarder at a point in time which is determined based on a rotational acceleration of a first driveline component;
- wherein the point in time at which the hydrodynamic retarder is activated is further determined based on a comparison of a rotational speed of a second driveline component with a first rotational speed threshold, wherein the second driveline component includes a transmission input.
A driveline, comprising:
- a hydrodynamic retarder;
- a first driveline component coupled to the hydrodynamic retarder;
- a second driveline component, wherein the controller is configured to activate the hydrodynamic retarder when or once the rotational acceleration of the first driveline component is equal to or greater than a first rotational acceleration threshold and a rotational speed of the second driveline component is equal to or greater than a first rotational speed threshold;
- and
- a controller configured to activate the hydrodynamic retarder at a point in time which is determined based on a rotational acceleration of the first driveline component.
2 more elements
A driveline operating method comprising:
- filling a hydrodynamic retarder that is rotationally coupled to a transmission in direct response to an input speed of the transmission exceeding a first threshold speed and an acceleration of an output of the transmission exceeding a threshold acceleration;
- and
- transitioning from filling of the hydrodynamic retarder to braking operation of the hydrodynamic retarder in direct response to the input speed of the transmission exceeding a second threshold speed that is greater than the first threshold speed.
Dependencies are inferred from the claim text.