System and method for improving fuel economy and reducing emissions when a vehicle is decelerating
US-10099675-B2 · Oct 16, 2018 · US
Engine control device
US2019178221A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2019178221-A1 |
| Application number | US-201916274443-A |
| Country | US |
| Kind code | A1 |
| Filing date | Feb 13, 2019 |
| Priority date | Feb 16, 2017 |
| Publication date | Jun 13, 2019 |
| Grant date | — |
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- Title
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- Abstract
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- Assignees and inventors
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- First independent claim
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- CPC / IPC classifications
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Abstract
Official abstract text for this publication.
An engine control device includes an electronic control unit. The electronic control unit is configured to perform a spark discharge with an ignition plug for each cylinder by cutting off energization after elapse of a predetermined period from start of energization to an ignition coil for each cylinder of the engine, to stop the spark discharge caused by the ignition plug for each cylinder after supply of fuel to the engine is stopped when operation of the engine is stopped, and to control an ignition plug so as to stop the spark discharge caused by the ignition plug from a cylinder after a rotation speed of a crankshaft decreases gradually and the rotation speed of the crankshaft reaches a preset threshold value or less, after the stop of the supply of fuel to the engine.
First claim
Opening claim text (preview).
What is claimed is: 1 . An engine control device comprising an electronic control unit configured to perform a spark discharge with an ignition plug for each cylinder by cutting off energization after elapse of a predetermined period from start of energization to the ignition coil for each cylinder of the engine, stop the spark discharge caused by the ignition plug for each cylinder of the engine after supply of fuel to the engine is stopped when operation of the engine is stopped, and retard an energization start timing to the ignition coil as a rotation speed of a crankshaft becomes lower when the rotation speed of the crankshaft decreases gradually after the stop of the supply of fuel to the engine. 2 . The engine control device according to claim 1 , wherein the electronic control unit is configured to retard the energization start timing to the ignition coil until after a compression top dead center of a cylinder when the rotation speed of the crankshaft becomes equal to or lower than a preset threshold value.
Assignees
Inventors
Classifications
- F02D41/042Primary
for stopping the engine · CPC title
- F02P5/1502Primary
using one central computing unit · CPC title
Reverse rotation of the engine · CPC title
Shortening the ignition when the engine is stopped (to prevent damage to the coil F02P3/0556) · CPC title
Protecting the coil when the engine is stopped · CPC title
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- What does patent US2019178221A1 cover?
- An engine control device includes an electronic control unit. The electronic control unit is configured to perform a spark discharge with an ignition plug for each cylinder by cutting off energization after elapse of a predetermined period from start of energization to an ignition coil for each cylinder of the engine, to stop the spark discharge caused by the ignition plug for each cylinder aft…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification F02D41/042. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Thu Jun 13 2019 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). 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).