Fuel supply construction for engines

Details Fuel supply construction for engines Fuel supply construction for engines

1999-06-04

2001-12-11

Moulis, Thomas N. (Department: 3747)

Internal-combustion engines

Charge forming device

With fuel pump

C123S516000

Reexamination Certificate

active

06328020

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a fuel supply structure in an engine provided with a high-pressure fuel supply means including a subsidiary tank for temporarily storing fuel to be supplied to a fuel injection valve.
BACKGROUND ART
For example, an intake manifold which is a member in an intake system in an engine is mounted to a sidewall of a cylinder head into which an intake port opens, as described in Japanese Patent Application Laid-open No.6-129316. The high-pressure fuel supply means for supplying fuel of a high pressure to the fuel injection valve provided in the intake manifold is mounted to an engine body such as a cylinder block, and the fuel injection valve provided in the intake manifold and the high-pressure fuel supply means are connected to each other by a fuel piping.
The above known engine suffers from the following problems. It is necessary to separately carry out the assembling of the intake manifold in the engine and the assembling of the high-pressure fuel supply means at the time of performing assembling or maintenance of the engine. Moreover, after completion of such assembling, it is necessary to carry out a piping operation for connecting the fuel injection valve provided in the intake manifold and the high-pressure fuel supply means to each other, and hence, a lot of time is required for such operation.
DISCLOSURE OF THE INVENTION
The present invention has been accomplished with the above circumstances in view, and it is an object of the present invention to enhance the operability of assembling of the high-pressure fuel supply means.
To achieve the above object, according to the present invention, there is provided a fuel supply structure in an engine, characterized in that said structure is comprised of a high-pressure fuel supply means which includes a subsidiary tank for temporarily storing fuel to be supplied to a fuel injection valve, the high-pressure fuel supply means being mounted to an intake system having the fuel injection valve provided therein.
With the above arrangement, the high-pressure fuel supply means which includes a subsidiary tank for temporarily storing fuel to be supplied to a fuel injection valve is mounted to the intake system having the fuel injection valve provided therein. Therefore, it is possible to complete the assembling of the intake system and the high-pressure fuel supply means only by mounting a subassembly formed of the high-pressure fuel supply means previously assembled to the intake system to the engine, leading to an enhanced assembling operability. Moreover, the assembling of a fuel piping from the high-pressure fuel supply means to the fuel injection valve can be previously finished in the state of subassembly and hence, the assembling operability is further enhanced.
In addition to the subsidiary tank, the high-pressure fuel supply means may include a high-pressure fuel pump or a high-pressure filter, and may include a surplus fuel returning means for returning a surplus fuel from the fuel injection valve to the subsidiary tank. The high-pressure fuel pump may be accommodated in the subsidiary tank, or mounted to the intake system outside the subsidiary tank. The intake system may be comprised of a surge tank and an intake pipe, and the high-pressure fuel supply means may be mounted to the intake pipe. The intake system may be disposed on one side of a cylinder axis, and an electric equipment box may be disposed on the other side of the cylinder axis.


REFERENCES:
patent: 5555858 (1996-09-01), Katoh
patent: 03064658 (1991-03-01), None
patent: 04295172 (1992-10-01), None
patent: 6-117270 (1994-04-01), None
patent: 6-129316 (1994-05-01), None
patent: 07-149290 (1995-06-01), None
patent: 08093603 (1996-04-01), None
patent: 08246974 (1996-09-01), None
patent: 09-280140 (1997-10-01), None
patent: 10-205347 (1998-08-01), None

Affiliated with

Also associated with

Rating

Fuel supply construction for engines does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Fuel supply construction for engines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fuel supply construction for engines will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2569492