Oil Temperature Control System for Electric Vehicle
US-2024266986-A1 · Aug 8, 2024 · US
Fluid pump speed control
US9020740B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9020740-B2 |
| Application number | US-201213651508-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 15, 2012 |
| Priority date | Oct 15, 2012 |
| Publication date | Apr 28, 2015 |
| Grant date | Apr 28, 2015 |
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Abstract
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A system includes a sump, a pump having a steady-state speed, a fluid component that receives the fluid from the fluid pump, and a controller. The controller detects a soak condition of the system in which the pump load is low as fluid is moved into vacated fluid passages. The steady-state speed of the pump is temporarily increased by adding a calibrated overspeed value to the steady-state speed, for a calibrated duration. The controller reduces the pump speed to the steady-state speed after the calibrated duration has elapsed. A method includes detecting the soak condition and temporarily increasing the steady-state speed via the controller by adding the calibrated overspeed value to the steady-state speed, for a calibrated duration, when the soak condition is detected. A control system includes a processor and storage medium having instructions embodying the method, with detection of the soak condition provided via measurement of fluid temperature.
First claim
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The invention claimed is: 1. A system comprising: a fluid sump; a torque-limited fluid pump having a calibrated steady-state speed, wherein the torque-limited fluid pump draws fluid from the fluid sump and circulates the fluid under pressure; a component that receives the fluid that is circulated by the torque-limited fluid pump; a temperature sensor positioned with respect to the fluid sump and configured to measure a temperature of the fluid in the fluid sump; and a cont…
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Frequently asked questions
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- What does patent US9020740B2 cover?
- A system includes a sump, a pump having a steady-state speed, a fluid component that receives the fluid from the fluid pump, and a controller. The controller detects a soak condition of the system in which the pump load is low as fluid is moved into vacated fluid passages. The steady-state speed of the pump is temporarily increased by adding a calibrated overspeed value to the steady-state spee…
- Who is the assignee on this patent?
- Gm Global Tech Operations Inc
- What technology area does this patent fall under?
- Primary CPC classification F01P7/167. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Apr 28 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).