Driveline for a vehicle including an electric drive motor and a powershift transmission having at least two transmission stages
AssigneeDana Belgium N.V.
InventorsJan A. Bedert, Koen B. Seynaeve, Dries C. T'Hooft
Life of this patent
Estimating the term…
Abstract
A method of shifting gears including providing a driveline for a vehicle. The driveline has an electric drive motor and a powershift transmission. The transmission has a first transmission stage and a second transmission stage. The method includes performing a range shift including handing over torque transmission from a range clutch of the first or second transmission to the other range clutch. The method also includes, simultaneously with the range shift, engaging one of the direction clutches of one transmission or keeping one of the direction clutches engaged.
Claims17
A method of shifting gears, the method comprising the steps of:
- providing a driveline for a vehicle, the driveline comprising:
- an electric drive motor;
- and
- a powershift transmission comprising at least:
- a first transmission stage having a first input drivingly engaged with the electric drive motor, a first output, a first clutching device, and a second clutching device, wherein the first input is configured to be drivingly engaged with the first output by engaging the first clutching device and by disengaging the second clutching device, and wherein the first input is configured to be drivingly engaged with the first output by engaging the second clutching device and by disengaging the first clutching device;
- and
- a second transmission stage having a second input drivingly engaged with the first output, a second output, a third clutching device, and a fourth clutching device, wherein the second input is configured to be drivingly engaged with the second output by engaging the third clutching device and by disengaging the fourth clutching device, and wherein the second input is configured to be drivingly engaged with the second output by engaging the fourth clutching device and by disengaging the third clutching device;
- wherein one of
- a. the first clutching device and the second clutching device are configured as direction clutches and the third clutching device and the fourth clutching device are configured as range clutches;
- and
- b. the first clutching device and the second clutching device are configured as range clutches and the third clutching device and the fourth clutching device are configured as direction clutches;
- the method further comprising the steps of:
- performing a range shift including handing over torque transmission from one of the range clutches to the other of the range clutches;
- and, simultaneously,
- engaging one of the direction clutches or keeping one of the direction clutches engaged,
- wherein the range shift is initiated when or once a speed of the electric drive motor reaches or exceeds an upper set point or when or once the speed of the electric drive motor reaches or falls below a lower set point.
A method of shifting gears, the method comprising:
- in a driveline including an electric drive motor,
- transitioning torque transmission from a first range clutch to a second range clutch of a two-stage powershift transmission while simultaneously engaging a direction clutch,
- wherein the transition of torque transmission is initiated when or once a speed of the electric drive motor reaches or exceeds an upper set point or when or once the speed of the electric drive motor reaches or falls below a lower set point.
A method of shifting gears, the method comprising:
- in a driveline including an electric drive motor and a two-stage powershift transmission, the two-stage powershift transmission including a first range clutch, a second range clutch, and a direction clutch,
- performing a range shift, wherein the range shift includes handing over torque transmission from the first range clutch to the second range clutch;
- and, simultaneously,
- engaging the direction clutch or keeping the direction clutch engaged,
- wherein the range shift is initiated when or once a speed of the electric drive motor reaches or exceeds an upper set point or when or once the speed of the electric drive motor reaches or falls below a lower set point.
Dependencies are inferred from the claim text.