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US-2016344137-A1 · Nov 24, 2016 · US
Transmission service warm-up feature
US9366336B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9366336-B2 |
| Application number | US-201414493476-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 23, 2014 |
| Priority date | Sep 23, 2014 |
| Publication date | Jun 14, 2016 |
| Grant date | Jun 14, 2016 |
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- Title
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Abstract
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A service warm-up feature warms transmission fluid to normal operating temperature faster than normal idle without requiring continuous technician attention. This facilitates checking the transmission fluid level. The feature increases the warm-up rate by commanding an increased line pressure and an increased idle speed, which causes more heat to be generated as the fluid flows through restrictions at an increased flow rate with an increased pressure drop. The warm-up rate may be further increased by holding the turbine shaft stationary to increase torque converter heat generation. Various precautions prevent accidental vehicle movement.
First claim
Opening claim text (preview).
What is claimed is: 1. A transmission having a service warm-up feature, the transmission comprising: a sump configured to hold a quantity of fluid; a pump configured to draw the fluid from the sump and deliver the fluid to a valve body at a line pressure and a flow rate; and a controller programmed to in a normal idle mode, command the line pressure to a nominal pressure value and command the flow rate to a nominal flow value, in response to activation of the service warm-u…
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Classifications
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
- F16H61/0006Primary
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
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Frequently asked questions
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- What does patent US9366336B2 cover?
- A service warm-up feature warms transmission fluid to normal operating temperature faster than normal idle without requiring continuous technician attention. This facilitates checking the transmission fluid level. The feature increases the warm-up rate by commanding an increased line pressure and an increased idle speed, which causes more heat to be generated as the fluid flows through restrict…
- Who is the assignee on this patent?
- Ford Global Tech Llc
- What technology area does this patent fall under?
- Primary CPC classification F16H61/0006. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jun 14 2016 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).