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 Title: |
US6622667:
Internal combustion engine
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Doers, Douglas A.; Franklin, WI
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| Assignee: |
DeltaHawk, Inc., Franklin, WI
other patents from DELTAHAWK, INC. (819797) (approx. 1)
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| Published / Filed: |
2003-09-23
/ 2000-09-15
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| Application Number: |
US2000000663838
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| IPC Code: |
Advanced:
F01P 7/16;
F02B 61/04;
F02F 1/38;
F01P 3/02;
F02B 3/06;
F02B 75/02;
Core:
F01P 7/14;
F02B 61/00;
F02F 1/26;
F02B 3/00;
more...
IPC-7:
F01P 1/06;
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| ECLA Code: |
F02M37/00L2; F01P7/16D; F02B61/04; F02B75/22; F02D33/00B2; F02F1/24; F02F1/38; F02F7/00A4; F02M53/04; F02M55/00C; R01P3/02; R02B3/06; R02B75/02S2; R02B75/36;
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| U.S. Class: |
123/041.31;
123/041.1;
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| Field of Search: |
123/41.31,41.42,41.1
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| Priority Number: |
| 2000-09-15 |
US2000000663838 |
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| Abstract: |
Improved internal combustion engine, particularly, an improved two-stroke, diesel aircraft engine. A first improvement includes a wrist pin/connection rod assembly. A plurality of fasteners extend through a wall of a wrist pin and into a wrist pin insert to secure the wrist pin to a cradle-like portion of a connecting rod. A second improvement includes a fuel injection system which cools fuel injectors with overflow fuel from a fuel pump. The overflow fuel is warmed as it cools the fuel injectors, thereby preventing ice-build up on a fuel filter in cold weather as the overflow fuel is recirculated to the fuel pump. A third improvement includes a new cylinder head cooling arrangement. The cylinder head and a cooling cap define an annular cooling passageway. Cooling fluid flows through the annular cooling passageway to cool the cylinder head. The cooling cap includes an inlet port and an outlet port which are not diametrically opposed. Accordingly, the annular cooling passageway includes a restricted portion to ensure cooling fluid flows completely around the annular cooling passageway to better cool the cylinder head. The cooling cap is adjustably mounted on the cylinder head, so that the cooling cap can be coupled to a cooling jacket independent of the location of the cylinder head on the engine or cylinder block, as when the cylinder head threads into the engine block. The same clamping device used to connect the cooling cap to the cylinder head can be used to secure the fuel injector to the cylinder head. A fourth improvement includes a cross-feed cooling passageway extending between multiple cylinder banks to provide thermal coupling between the cylinder heads and the lower crankcase of the engine, and to provide a safety arrangement for continued cooling fluid flow at least in the event a thermostat in communication with a cooling jacket should fail.
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| Attorney, Agent or Firm: |
Michael Best & Friedrich LLP ;
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| Primary / Asst. Examiners: |
Wolfe, Willis R.; Benton, Jason
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| INPADOC Legal Status: |
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Family Legal Status Report
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| Parent Case: |
CROSS-REFERENCE TO RELATED APPLICATIONS
This application claims the benefit of U.S. Provisional Application No. 60/220,787, filed Jul. 25, 2000.
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| Family: |
Show 24 known family members
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First Claim:
Show all 7 claims |
What is claimed is:
1. An internal combustion engine, comprising:
- an engine block at least partially defining a cylinder;
- a piston reciprocally operable within said cylinder;
- a cylinder head cooperating with said cylinder and said piston to define a combustion chamber; and
- a fuel injection system including:
- a fuel injector for injecting fuel into said combustion chamber, said fuel injector having a fuel inlet port, a fuel outlet port, a fuel passage communicating between said fuel inlet port and said fuel outlet port, a cooling fuel inlet port, a leak-of fuel outlet port, and a cooling fuel passage communicating between said cooling fuel inlet port and said leak-off fuel outlet port;
- a fuel supply line communicating between said fuel pump and said fuel inlet port;
- a bypass fuel line communicating between said fuel pump and said cooling fuel inlet port, such that overflow fuel from said fuel pump flows through said bypass fuel line, into said cooling fuel inlet port, through said cooling fuel passage and out of said leak-off fuel outlet port, thereby cooling said fuel injector, wherein the overflow fuel is recirculated from said leak-off fuel outlet port back to said fuel pump; and
- a fuel filter placed upstream of said fuel pump such that the overflow fuel recirculated to said fuel pump flows through said fuel filter prior to reaching said fuel pump, and such that the overflow fuel which cools said fuel injector is warmed as it flows through said fuel injector, thereby heating the fuel which flows through said fuel filter to substantially prevent ice build-up on said fuel filter during cold weather.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 1 U.S. patent(s) that reference this one
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