Diesel engine
US9897059B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 2015 |
| Grant date | Feb 20, 2018 |
| Priority date | — |
| Expiry date | May 22, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A diesel engine includes a piston, a cylinder head, and a fuel injector. The fuel injector has a valve body with bored nozzle holes in its tip part. A cavity having a circular shape in plan view is formed in a crown surface of the piston to concave to the counter cylinder head side. A wall surface constituting the cavity has a central ridge portion bulging toward the fuel injector while bulging larger toward the center of the cavity, a periphery concave portion formed radially outward of the central ridge portion to concave radially outward, and a lip portion formed between the periphery concave portion and the crown surface to convex radially inward. A lip radius R, a nozzle hole length L, a nozzle hole diameter D, and a bore radius B are designed to satisfy the following equation:99.4D×(1−3D)×(L+2.7)≦R≦min{237.1D×(1−3D)×(0.8L+1),2B/3}.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.