Hermetically Sealed Tank System
US-2018335003-A1 · Nov 22, 2018 · US
Fuel-pressure-sensor diagnosis device
US8955490B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8955490-B2 |
| Application number | US-201213684371-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 23, 2012 |
| Priority date | Nov 23, 2011 |
| Publication date | Feb 17, 2015 |
| Grant date | Feb 17, 2015 |
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Abstract
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A fuel-pressure-sensor diagnosis device is applied to a fuel injection system having a plurality of fuel pressure sensors detecting a fuel pressure which is provided to a fuel injector of each cylinder, and a control portion controlling the fuel injectors by using a computed result which is computed based on a variation in the fuel pressure detected by the fuel pressure sensor due to a fuel injection. Two pressure sensors of which pulsation values of the detected fuel pressure are in a specified range are selected among the multiple fuel pressure sensors. For example, a pair “A” refers to the sensors # 1 and # 3 , a pair “B” refers to the sensors # 3 and # 4 , a pair “C” refers to the sensors # 4 and # 2 , and a pair “D” refers to the sensors # 2 and # 1 . An ECU diagnoses whether the selected sensors are faulty by comparing the detected values.
First claim
Opening claim text (preview).
What is claimed is: 1. A fuel-pressure-sensor diagnosis device applied to a fuel injection system having a plurality of fuel injectors provided to each cylinder of an internal combustion engine, an accumulator accumulating a high-pressure fuel and distributing the fuel to the fuel injectors, a plurality of fuel pressure sensors detecting a fuel pressure in a fuel supply passage at multiple points from the accumulator to an injection port of the fuel injector, and a control portion…
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Classifications
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
- F02M69/54Primary
Mechanical Engineering · mapped topic
- F02M57/005Primary
Mechanical Engineering · mapped topic
Mechanical Engineering · mapped topic
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Frequently asked questions
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- What does patent US8955490B2 cover?
- A fuel-pressure-sensor diagnosis device is applied to a fuel injection system having a plurality of fuel pressure sensors detecting a fuel pressure which is provided to a fuel injector of each cylinder, and a control portion controlling the fuel injectors by using a computed result which is computed based on a variation in the fuel pressure detected by the fuel pressure sensor due to a fuel inj…
- Who is the assignee on this patent?
- Denso Corportion, Denso Corp
- What technology area does this patent fall under?
- Primary CPC classification F02M69/54. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Feb 17 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).