Arrangement for a fuel line in an internal combustion engine

Details Arrangement for a fuel line in an internal combustion engine Arrangement for a fuel line in an internal combustion engine

1993-02-22

1994-04-05

Cross, E. Rollins

Internal-combustion engines

Charge forming device

Fuel injection system

1231935, F02M 5502, F02F 124

Patent

active

052995402

DESCRIPTION:

BRIEF SUMMARY
This invention relates to an arrangement for a fuel line for a fuel injector system of an internal combustion engine and particularly relates to an arrangement of ports and channels within the cylinder head of the engine for transmitting fuel.


PRIOR ART

In diesel engines for use in heavier trucks, for example, a method is known for using so-called fuel injectors which are designed integral with a high pressure pump arranged separately for each injector. In this case each injector is supplied with fuel from a low pressure pump and the high pressure required for the injection is generated in each injector. This obviates the need for long pipes with many connections subjected to high pressure, thereby reducing the risk of leakage. However, this type of injector requires more pipes than other known types of fuel injectors. At the same time the space for these pipes is even more limited due, among other things, to the fact that each injector also requires a drive to perform the pumping function. Normally this drive is provided by means of rocker arms arranged above the injectors and whose movements are controlled by a camshaft.
This gives rise to practical problems in finding space for the fuel lines, particularly the pipes nearest the injectors. One known method of solving this problem is to design the pipes in the form of bores in the cylinder head of the engine. An example of this is shown in patent specification U.S. Pat. No. 4,971,016, which describes how two injectors arranged in a common cylinder head are supplied with fuel via bored ports. The bores are connected one of the transverse sides of the cylinder head to a pump and valves incorporated in the rest of the fuel system. There are no connections requiring a great deal of space on the lateral surfaces of the cylinder head, on which intake and outlet manifolds for the engine must conventionally be connected.
However, this known solution presupposes that the cylinder head is designed so that sufficient space is created on the transverse side of the cylinder head, and also so that the engine only has one cylinder head. On the other hand, in the case of a multiple cylinder engine with separate cylinder heads for each cylinder, the known solution cannot be used. In cases where the engine is also of the type having several admission and exhaust valves and/or several intake and exhaust ports for each cylinder, there are practical problems in finding space and a suitable wall for designing the fuel lines in the form of bored ports.


OBJECT OF THE INVENTION

The object of this invention is to provide fuel ports in the cylinder head even in cases where the engine has several separate cylinder heads. Further objects are to be able to use a simple, cheap production method such as boring for designing such ports, and also to be able to use such ports in cases where the engine has several admission and exhaust valves and/or several intake and exhaust ports. Further objects are to simplify the fuel lines and also the connections required in the fuel line arrangement for fuel injectors, and also to provide, by simple means, pipes which require little space either inside or outside the cylinder head, so that connections can be reduced as can the risk of leakage.


BRIEF DESCRIPTION OF THE INVENTION

This is achieved according to the invention by designing the arrangement in accordance with the invention, there is a respective fuel injector for each cylinder in a multiple cylinder internal combustion engine. Each fuel injector is located in a respective cylinder head.
There are a plurality of fuel passages extending in the cylinder head. Each fuel passage is in two sections including a first section extending laterally out from the space which receives the fuel injector in a direction diagonally to the longitudinal direction of the engine and a second fuel passage section extending at an angle to the first section and then intersecting the lateral side of the cylinder head. All of the first passage sections extend to and open on the transverse surface of the resp

REFERENCES:
patent: 3125078 (1964-03-01), Reiners
patent: 3832983 (1974-09-01), Nickly
patent: 3845748 (1974-11-01), Eisenberg
patent: 3949724 (1976-04-01), Nickly
patent: 4214560 (1980-07-01), Nickly
patent: 4485790 (1984-12-01), Nishimura et al.
patent: 5062405 (1991-11-01), Daly

Affiliated with

Also associated with

Rating

Arrangement for a fuel line in an internal combustion engine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Arrangement for a fuel line in an internal combustion engine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Arrangement for a fuel line in an internal combustion engine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-505378