Heating and cooling device and pvt equipment using the same
US-2024027422-A1 · Jan 25, 2024 · US
Viscosity measuring apparatus
US9752971B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9752971-B2 |
| Application number | US-201214408026-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 18, 2012 |
| Priority date | Jun 18, 2012 |
| Publication date | Sep 5, 2017 |
| Grant date | Sep 5, 2017 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A viscosity measuring apparatus is mounted on a vehicle provided with an engine, a cylinder pressure sensor configured to detect cylinder pressure which is inner pressure of a cylinder of the engine, a fuel injection valve configured to supply fuel to the engine, and a temperature sensor configured to detect temperature of a coolant of the engine. The viscosity measuring apparatus is provided with: an estimating device configured to calculate a cooling loss from a heating value of the cylinder based on the cylinder pressure detected by the cylinder pressure sensor and an input heating value of the cylinder, and to estimate viscosity of the coolant on the basis of the calculated cooling loss.
First claim
Opening claim text (preview).
The invention claimed is: 1. A viscosity measuring apparatus mounted on a vehicle comprising an engine, a cylinder pressure sensor configured to detect cylinder pressure which is inner pressure of a cylinder of the engine, a fuel injection valve configured to supply fuel to the engine, and a temperature sensor configured to detect temperature of a coolant of the engine, said viscosity measuring apparatus comprising: an estimating device configured to calculate a cooling loss from a heating value of the cylinder based on the cylinder pressure detected by the cylinder pressure sensor and an input heating value of the cylinder, and to estimate viscosity of the coolant on the basis of a relation between the viscosity of the coolant and a cooling loss, which is led from an operation condition of the engine and the temperature of the coolant detected by said temperature sensor, and the calculated cooling loss. 2. The viscosity measuring apparatus according to claim 1 , further comprising a determining device configured to determine that the viscosity is abnormal if the estimated viscosity deviates from a designed value of the coolant by a predetermined value or more. 3. The viscosity measuring apparatus according to claim 2 , wherein the estimation of the viscosity by said estimating device and the determination of the abnormal viscosity by said determining device are performed if each of a time differential value of number of revolutions of the engine, a time differential value of an injection quantity of the fuel injection valve, and a time differential value of the temperature detected by the temperature sensor is less than or equal to respective one of predetermined values.
Assignees
Inventors
Classifications
by monitoring pressure in cylinders · CPC title
by determining the cylinder pressure · CPC title
Engine speed gradient · CPC title
Cooling liquid · CPC title
thermal properties · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9752971B2 cover?
- A viscosity measuring apparatus is mounted on a vehicle provided with an engine, a cylinder pressure sensor configured to detect cylinder pressure which is inner pressure of a cylinder of the engine, a fuel injection valve configured to supply fuel to the engine, and a temperature sensor configured to detect temperature of a coolant of the engine. The viscosity measuring apparatus is provided w…
- Who is the assignee on this patent?
- Tomita Sho, Kuroki Rentaro, Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification G01N11/00. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Tue Sep 05 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).