JPS5918130Y2 - Exhaust gas recirculation valve positioning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a positioning device for an exhaust gas recirculation (hereinafter referred to as EGR) valve that accurately determines the position of the exhaust gas recirculation (hereinafter referred to as EGR) valve to improve the combustion condition of an engine.

In internal combustion engines, such as easel engines, it is known to recirculate exhaust gas into the air supply in order to eliminate pollution problems.

However, when increasing the EGR amount under certain operating conditions, if the EGR amount exceeds a certain value, black smoke will suddenly be generated, the engine output will decrease, and the amount of harmful substances in the exhaust gas will increase rapidly. .

It is known that this limit EGR rate has a large correlation with the engine's fuel injection amount. Therefore, in order to take effective exhaust gas countermeasures, it is necessary to
It is necessary to precisely determine the relative relationship between the control lever of the fuel injection pump that controls the valve opening and the fuel injection amount.

However, in the past, there was no suitable device for accurately determining the relative relationship between the control lever of the injection pump and the EGR valve, and the control lever of the injection pump was always pulled by a return spring, etc. Adjustments had to be made based on intuition, making the work extremely troublesome.

Therefore, an object of the present invention is to provide an exhaust gas recirculation valve positioning device that can easily and accurately determine the relative relationship between the opening degree of the EGR valve and the control lever of the fuel injection pump without relying on the intuition of a skilled person. It is in.

According to the present invention, in the exhaust gas recirculation device in which the controller 1 to the roll lever of the injection pump and the valve for controlling the amount of exhaust gas recirculation are connected by a connecting means, the connecting means is provided with a telescopic means, the first control lever
The first positioning means comprises a hole formed in the main body housing of the injection pump, a hole formed in the control lever of the injection pump, and a shaft fitted into these holes, Second positioning means are provided on the valve.

Therefore, since the control I/roll lever of the fuel injection pump and the valve that controls the amount of exhaust gas recirculation, that is, the EGR valve, are connected by a connecting means having a telescopic means, the first positioning means provided on the control lever, E.G.
By aligning the second positioning means provided on the R valve with the telescopic means, the relative relationship between the EGR valve and the control 1 roll lever of the fuel injection pump can be optimally adjusted.

In carrying out the present invention, it is preferable that one of the first and second positioning means is a matching mark and the other is a pin or bolt.

However, bolt pins or the like may be used for both.

Next, an embodiment of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a fuel injection pump main body, and a control lever 3 is pivotally supported on this injection pump main body 1 by a shaft 2. As shown in FIG.

On the other hand, the EGR pipe 4 is provided with an EGR valve 5 such as a butterfly valve, and this EGR valve 5 is opened and closed by a control lever 6, thereby controlling the amount of EGR gas flowing inside the EGR pipe.

The control lever 3 of the injection pump 1 and the control lever 6 of the EGR valve 5 are connected by a connecting means 7, and although this connecting means 7 is shown as a link or a rod in the illustrated example, it may be a wire or the like. You can also use

The connecting means 7 is provided with an extensible means 8 such as a turnbuckle, so that the length of the connecting means 7 can be adjusted.

Generally, the idling position and maximum load of the injection pump are adjusted to suit each individual engine, so it is difficult to control the EGR valve based on a fixed injection amount point that is determined by measuring the pump discharge amount for both sets. be.

Therefore, according to the present invention, a first positioning means 10 is provided on the control lever 3 of the injection pump at a certain point of the fuel injection amount determined for the injection pump.

As the first positioning means, as shown in FIG.
For example, a pin is used, and this pin 10 passes through a hole 11 in the control lever 3 of the fuel injection pump and is inserted into a hole 12 provided in the pump body 1.

Further, the EGR valve 5 is provided with a second positioning means 14, and this positioning means 14 is exemplified by a match mark or mark 14 in the figure, and the tip of the control I/roll lever 6 is placed on this match mark. It is possible to confirm that the position has been positioned by checking that the two lines match.

In the figure, 16 is a rack for the injection pump, 17 is a connecting fitting for piping from the injection pump to each cylinder, and B1. B2 is a bolt for adjusting the idling and maximum load positions of the control lever.

The aforementioned holes 11 and 12 are arranged to coincide at a position where the controller 1 to the roll lever 3 of the injection pump are inclined by an angle α, that is, at a predetermined fuel injection amount.

Therefore, if the pin 10 is inserted in this position, the control lever 3 will be inclined at an angle α, and the amount of fuel to be injected will be the known amount as described above.

When this pre-known amount of fuel is burned, E
Since the amount of EGR to be recirculated by the GR valve 5 is known in the design, depending on whether the EGR valve 5 is open or open at that time, when the angle of the control lever 3 is α,
The telescopic means 8 may be adjusted so that the control lever 6 of the EGR valve 5 is inclined at an angle β.

In the illustrated embodiment, since the tip of the control lever 6 and the alignment mark 14 are used as the second positioning means, the control lever 6 of the EGR valve 5 is
It is only necessary to make the tip of the mark coincide with the match mark 14.

At that time, controller 1 to roll lever 6 are tilted by angle β, and this position provides the best EGR in relation to the injection pump.
You will decide the amount.

Once this relationship has been determined, the pin 10 can be pulled out and the engine can be put into normal operating condition.

As shown in FIG.
0, the control lever 3 remains stationary during positioning, so that the control lever 3 can be suitably positioned by means of a return spring (not shown) or the like.

Since it is only necessary to adjust the expansion/contraction means 8 in accordance with the second positioning means, the adjustment can be easily and accurately performed by one worker.

Further, even if there is a manufacturing error between the fuel injection pump 1 and the EGR valve 5, the EGR amount can be easily adjusted.

[Brief explanation of drawings]

FIG. 1 is a side view showing one embodiment of the EGR valve positioning device of the present invention, and FIG. 2 is a view taken along line II--II in FIG. 1.

Claims (1)

[Scope of utility model registration request] In an exhaust gas recirculation device in which a control lever of an injection pump and a valve for controlling the amount of exhaust gas recirculation are coupled by a coupling means, the coupling means is provided with a telescoping means, and the control lever is provided with a first positioning means. The first positioning means includes a hole formed in the main body housing of the injection pump, a hole formed in the control lever of the injection pump, and a shaft fitted into these holes, and the first positioning means is provided with a first positioning means for the valve. 1. A positioning device for an exhaust gas recirculation valve, comprising: two positioning means.