Method for adjusting the spatial position of the roll axis of a motor vehicle
US-9387852-B2 · Jul 12, 2016 · US
Method for operating a drivetrain for a motor vehicle and corresponding drivetrain
US10358030B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10358030-B2 |
| Application number | US-201515311076-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 8, 2015 |
| Priority date | May 15, 2014 |
| Publication date | Jul 23, 2019 |
| Grant date | Jul 23, 2019 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A method for operating a drivetrain for a motor vehicle, said method includes: reducing a transmission torque transmitted between a primary drive axle operatively connected with a secondary drive axle of the motor vehicle via a clutch configured to allow adjustment of the transmission torque when determining at the secondary drive axle a wheel slip which exceeds a defined slip threshold value.
First claim
Opening claim text (preview).
The invention claimed is: 1. A method for operating a drivetrain for a motor vehicle, said method comprising: determining a wheel slip at a secondary drive axle of the motor vehicle; and reducing a transmission torque transmitted by a clutch operatively connected between a primary drive axle of the motor vehicle and the secondary drive axle, while an actually transmitted torque remains unchanged, when the wheel slip at the secondary drive axle exceeds a defined slip threshold value. 2. The method of claim 1 , wherein the clutch is configured as a multidisc clutch and the transmission torque is adjusted by adjusting a pressing force of the multidisc clutch. 3. The method of claim 1 , wherein the wheel slip at the secondary drive axle is recognized when a rotational speed of the secondary axle exceeds a rotational speed of the primary axle. 4. The method of claim 1 , wherein the wheel slip at the secondary drive axle is recognized when a vehicle speed determined from at least one of a rotational speed of the primary drive axle and a rotational speed of the secondary drive axle exceeds an actual speed of the motor vehicle. 5. The method of claim 1 , wherein the wheel slip at the secondary drive axle is recognized when a slip at the primary drive axle and a slip at the secondary dive axle exceed the slip threshold value. 6. The method of claim 1 , wherein the transmission torque is reduced to a setpoint transmission torque which corresponds to a torque that is maximally applicable via the secondary drive axle. 7. The method of claim 6 , wherein the maximally applicable torque is determined by using at least one variable of the group consisting of an axle load of the secondary dive axle, a road friction value, a dynamic wheel diameter of a wheel of the secondary drive axle and a transmission ratio between the clutch and the secondary drive axle. 8. The method of claim 7 , wherein the road friction value is determined from a longitudinal acceleration of the motor vehicle. 9. The method of claim 1 , wherein the transmission torque is increased again when clutch slip of the clutch exceeds a maximal value.
Assignees
Inventors
Classifications
Control by electric or electronic means, e.g. of fluid pressure · CPC title
- B60K23/0808Primary
for varying torque distribution between driven axles, e.g. by transfer clutch · CPC title
- B60K17/35Primary
including arrangements for suppressing or influencing the power transfer, e.g. viscous clutches · CPC title
Friction clutch · CPC title
Slip of vehicle wheels · CPC title
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Frequently asked questions
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- What does patent US10358030B2 cover?
- A method for operating a drivetrain for a motor vehicle, said method includes: reducing a transmission torque transmitted between a primary drive axle operatively connected with a secondary drive axle of the motor vehicle via a clutch configured to allow adjustment of the transmission torque when determining at the secondary drive axle a wheel slip which exceeds a defined slip threshold value.
- Who is the assignee on this patent?
- Audi Ag
- What technology area does this patent fall under?
- Primary CPC classification B60K23/0808. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jul 23 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).