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Control device for coolant flow in an internal combustion engine
US9551270B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9551270-B2 |
| Application number | US-201314774332-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 12, 2013 |
| Priority date | Feb 12, 2013 |
| Publication date | Jan 24, 2017 |
| Grant date | Jan 24, 2017 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A control device for an internal combustion engine is a control device, applied to an internal combustion engine including an EGR cooler which includes a heat exchange body made of a material including SiC. The control device includes a control unit that controls a flow rate of coolant passing through an EGR cooler to be small in a case of a temperature of the coolant not less than a predetermined value in ending the coolant stop control of the coolant stop control unit, as compared with a case of a temperature of the coolant less than the predetermined value in ending the coolant stop control of the coolant stop control unit.
First claim
Opening claim text (preview).
The invention claimed is: 1. A control device for an internal combustion engine, the control device that is applied to the internal combustion engine including an Exhaust Gas Recirculation (EGR) cooler which is arranged in an EGR passage introducing an EGR gas into an intake passage of the internal combustion engine and which includes a heat exchange body made of a material including SiC, the control device comprising: a coolant stop control unit that executes coolant stop control to stop a coolant from flowing into the EGR cooler; and a control unit that controls a flow rate of the coolant passing through the EGR cooler to be small in a case of a temperature of the coolant not being less than a predetermined value before the coolant stop control ends in the coolant stop control unit, as compared with a case of a temperature of the coolant being less than the predetermined value before the coolant stop control ends in the coolant stop control unit. 2. The control device for the internal combustion engine of claim 1 , wherein the internal combustion engine includes a pump that supplies a coolant to an engine body and the EGR cooler, the control unit reduces output of the pump, in a case of the temperature of the coolant not being less than the predetermined value before the coolant stop control ends in the coolant stop control unit, as compared with a case of the temperature of the coolant being less than the predetermined value before the coolant stop control ends in the coolant stop control unit. 3. The control device for the internal combustion engine of claim 2 , wherein the control unit gradually changes output of the pump to a target output, when reducing output of the pump.
Assignees
Inventors
Classifications
- F01P7/16Primary
by thermostatic control · CPC title
with coolers in the recirculation passage · CPC title
Pumping liquid coolant; Arrangements of coolant pumps · CPC title
controlling the temperature of the recirculated gases · CPC title
Cooling circuits not specific to a single part of engine or machine (F01P3/22 takes precedence) · CPC title
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Frequently asked questions
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- What does patent US9551270B2 cover?
- A control device for an internal combustion engine is a control device, applied to an internal combustion engine including an EGR cooler which includes a heat exchange body made of a material including SiC. The control device includes a control unit that controls a flow rate of coolant passing through an EGR cooler to be small in a case of a temperature of the coolant not less than a predetermi…
- Who is the assignee on this patent?
- Kitayama Takeshi, Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F01P7/16. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jan 24 2017 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).