Method to control an engine braking operation
US-2016297446-A1 · Oct 13, 2016 · US
Grade and payload based transmission gear selection strategy
US9052013B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9052013-B2 |
| Application number | US-201213715140-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 14, 2012 |
| Priority date | Dec 14, 2012 |
| Publication date | Jun 9, 2015 |
| Grant date | Jun 9, 2015 |
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Abstract
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A method is described for controlling an automatic transmission of a vehicle during deceleration arising from a force resisting forward movement arising from an incline grade and a vehicle mass. The force of resistance to forward movement is determined at least based upon the incline grade. A destination gear is calculated based upon a set of gear-specific output curves and the force of resistance. The destination gear is compared to a current gear within which the machine is operating. The programmed controller executes an early downshift schedule when the destination gear is at least two positions lower than the current gear, thereby initiating a series of downshifts of the automatic transmission from the current gear to the destination gear. During each gear shift performed according to the early downshift schedule, shifting occurs at a cross-over point between output curves of current and next lower gears.
First claim
Opening claim text (preview).
What is claimed is: 1. A method, implemented by a programmed controller, of controlling an automatic transmission during deceleration of a vehicle arising from a force resisting forward movement of the vehicle arising from a combination of an uphill incline grade and a vehicle mass, the method comprising: determining a force of resistance to forward movement of the vehicle, the force of resistance being determined at least based upon the uphill incline grade; determining, by the…
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Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
- F16H61/21Primary
Mechanical Engineering · mapped topic
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- What does patent US9052013B2 cover?
- A method is described for controlling an automatic transmission of a vehicle during deceleration arising from a force resisting forward movement arising from an incline grade and a vehicle mass. The force of resistance to forward movement is determined at least based upon the incline grade. A destination gear is calculated based upon a set of gear-specific output curves and the force of resista…
- Who is the assignee on this patent?
- Caterpillar Inc
- What technology area does this patent fall under?
- Primary CPC classification F16H61/21. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jun 09 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).