JPS6129968Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a fuel supply system for an internal combustion engine.

2. Description of the Related Art Conventional fuel supply devices include those shown in FIGS. 1 and 2, for example. This includes an intake passage 2 formed within a cylindrical throttle chamber body 1 that also serves as a bracket for mounting a fuel injection valve.
An intake throttle valve 4 is attached to the downstream end by a shaft 3.
Further, on the upstream side of the intake throttle valve 4, a cylindrical fuel injection valve mounting portion 5 is formed to protrude from the inner wall of the intake passage so as to be located approximately at the center of the intake passage 2. A mounting hole 6 for a fuel injection valve is formed concentrically with the intake passage 2. An electromagnetic fuel injection valve 7 is installed in this mounting hole 6, and this fuel injection valve 7
A fuel supply passage 8 is connected to a fuel pump (not shown).
Supply fuel via. This fuel injection valve 7 has a pair of lead wires 9 that supply an actuation signal from a control unit (not shown) to the injection valve 7.
This lead wire 9 is connected to a connector 11 attached to the outer wall of the throttle chamber body 1 through a groove 10a formed in a retaining bracket 10 of the fuel injection valve 7.
Further, a terminal (not shown) connected to a control unit (not shown) is connected to this connector 11.

Then, the fuel injection valve 7 is actuated by a signal from the control unit that receives a detection signal from an intake air amount detector (not shown) that detects the amount of air taken in according to the opening degree of the intake throttle valve 4, and the intake air amount is It is designed to inject fuel commensurate with the amount of fuel. Further, surplus fuel is returned from the fuel return passage 12 to a fuel tank (not shown) via the pressure regulator 13.

In addition, 14 is a bypass air pipe for increasing the amount of air during engine cold operation to promote warming up, 15 is an O-ring for sealing, 16 is an air duct, and 17 is an intake manifold.

However, in such a conventional fuel supply device, a pair of easily deformable lead wires 9 inserted into a flexible insulating tube are fitted into grooves 10a formed in a retaining bracket 10 to connect the fuel injection valve 7. Since the structure connects the connector 11 and the connector 11,
Removal prevention bracket 1 on the throttle chamber body 1
When attaching the lead wire 0, the lead wire 9 may be displaced from the groove 10a and the lead wire 9 may be bitten, and there is a risk that the tube of the lead wire may be damaged and a short circuit may occur.

The present invention was developed in view of these conventional problems, and the wiring member that connects the fuel injection valve and the connector attached to the outer wall of the bracket is made of a pair of electrical conductors with connectors formed at both ends. The outer periphery, excluding the connector part, is integrally molded with an insulating material to fit into the groove for wiring, which prevents the wiring from getting caught and short-circuited, and also simplifies installation. The purpose is to provide a fuel supply system for engines.

Hereinafter, the present invention will be explained based on an embodiment shown in FIGS. 3 to 6A to 6C. Incidentally, the same elements as those in the conventional example are given the same numbers as in FIGS. 1 and 2, and the description thereof will be omitted.

In the figure, a groove 10a formed in the retaining bracket 10 of the fuel injection valve 7 and a hole 1a formed in the throttle chamber body 1 connected to the groove 10a are formed as described later. A wiring member 20 is fitted, one end of this wiring member 20 is connected to an input terminal 7a formed on the fuel injection valve 7, and the other end is connected to a pair of connectors 21 attached to the outer wall of the throttle chamber body 1. is connected to the terminal 21a of the terminal 21a. A pair of input terminals 7a of the fuel injection valve 7 each have a rod-shaped conductive member formed to protrude from a shoulder of the injection valve main body case, and are connected to a coil (not shown) inside the main body case. The connector 21 also has a pair of terminals 2 made of a rod-shaped conductive member.
1a is fixed by an insulating member 21b, and one end of these terminals 21a is connected to the wiring member 20.
The other end is connected to a wiring (not shown) connected to a control unit (not shown).

Here, the wiring member 20 has input terminals 7a of the injection valve 7 at both ends, respectively, as shown in FIG. 6A←C.
and connector parts 23a, 2 having holes 22a, 22b into which the terminals 21a of the connector 21 are inserted;
An insulating member 25 covers the outer periphery of the two conductive wires 24a and 24b, excluding the connector portions 23a and 23b, forming the wire 3b.
It is formed by molding. This wiring member 20 is bent as shown in the figure so that it can be fitted into the groove 10a and the hole 1a of the throttle chamber body 1 connected thereto during molding.

Next, to explain how to attach the wiring member 20, the fuel injection valve 7 is connected to the throttle chamber body 1.
After installing it in the mounting hole 6 of the wiring member 20, the input terminal 7a of the fuel injection valve 7 is inserted into a pair of holes 22a formed in one connector part 23a of the wiring member 20, and
The other connector portion 23b is inserted into the hole 1a formed in the throttle chamber body 1 so as to face the connection hole 21c of the connector 21. Then, the connector 21 is inserted into the connection hole 21c, and the terminal 21a of the connector 21 is inserted into the hole 22b formed in the connector portion 23b of the wiring member 20. Thereafter, the retaining bracket 10 is fixed to the throttle chamber body 1 with its groove 10a and the wiring member 20 aligned. At this time, the molded solid portion of the wiring member 20 fits into the groove 10 formed in the retaining bracket 10 without any misalignment, so that the wiring member 20 is connected to the throttle chamber body 1 and the retaining bracket 10.
There is no chance of being caught in between. Therefore, short circuits due to jamming can be prevented. In addition, there is no need to bend the lead wires to fit the groove shape as in the conventional case, and the connector parts 23a and 23b are automatically fitted into the groove 10a by simply setting them to be connected, so the assembly work is extremely simple. become.

As explained above, the present invention has a structure in which the wiring member that connects the fuel injection valve and the connector is integrally molded with an insulating material on the outer periphery of the electrical conductor wire, excluding the connector portion, which has connector portions formed at both ends. This prevents the wiring member from slipping and getting caught between the bracket and the retaining bracket.
This makes it possible to prevent short circuits and improve the efficiency of the installation work.

[Brief explanation of drawings]

Fig. 1 is a sectional view of main parts showing a conventional fuel supply device, Fig. 2 is a view taken along the - arrow in Fig. 1, Fig. 3 is a plan view showing an embodiment of the present invention, and Fig. 4 is a Fig. 5 is a - arrow view of Fig. 3;
6A to 6C show the wiring member of FIG. 3, where A is a front view, B is a bottom view of A, and C is a side view of A. 1... Throttle chamber body, 2... Intake passage, 3... Intake throttle valve, 7... Electromagnetic fuel injection valve,
10... Removal prevention bracket, 20... Wiring member,
21... Connector, 23a, 23b... Connector portion, 25... Insulating member.

Claims (1)

[Scope of utility model registration request] An electromagnetic fuel injection valve is fixed to an intake passage of an engine via a bracket, and the fuel injection valve and a connector attached to the outer wall of the bracket are connected in a groove formed between the intake passage wall and the bracket. In a fuel supply device for an internal combustion engine equipped with a wiring member, the wiring member is formed into a shape that fits into the groove by molding the outer periphery of a pair of electrical conductors having connector parts at both ends, excluding the connector parts, with an insulating material. A fuel supply device for an internal combustion engine, characterized in that it has a configuration in which: