JP2513499B2 - Fuel correction device for fuel injection device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a fuel correction device for a fuel injection device in a diesel engine or the like, and particularly to both a fuel correction for a supercharger and a fuel correction for a highland. The present invention relates to a fuel correction device for a fuel injection device capable of fulfilling its function.

[Prior Art] Conventionally, for turbochargers and other superchargers,
There is a fuel compensator called a boost compensator that performs fuel compensation so as to increase the fuel injection amount when the compression pressure is large. Further, there is a fuel correction device called an aneroid compensator that performs fuel correction so as to reduce the fuel injection amount according to the atmospheric pressure or the compression pressure when the vehicle travels in a high altitude where the atmospheric pressure is low. Conventionally, these fuel correction devices are provided separately.

Further, a boost compensator and an aneroid compensator having both of these fuel correction functions have been devised. For example, JP-A-54-71235 and JP-A-55
-123322 and so on. However, in these mechanisms, it is necessary to separately install the boost compensator and the aneroid compensator to the injection device via each connecting rod, or alternatively, by using the regulator, the chamber pressure on the atmospheric pressure chamber side can be increased. There was a problem that the structure was complicated, such as controlling.

[Problems to be Solved by the Invention] The present invention has been made in view of the above problems, and has both a so-called aneroid compensator and boost compensator functions, and a fuel for a fuel injector having a compact and simple structure. It is an object to provide a correction device.

[Means for Solving the Problems] That is, the present invention provides a boost compensator that performs fuel correction according to boost pressure from a supercharger such as a turbocharger, and fuel correction according to atmospheric pressure such as low atmospheric pressure in highlands. A fuel compensator for a fuel injection device having an aneroid compensator for performing the above, wherein the boost compensator and the aneroid compensator are arranged side by side in a housing of the fuel injector, and between the boost compensator and the aneroid compensator. And a rotatable fixed shaft disposed in the boost compensator, and one end of the rotatable fixed shaft can be brought into contact with the push rod of the boost compensator, and the other end is Can contact the push rod of the above Aneroid Compensator And a correction link for the fuel injection device.

[Operation] In the fuel correction device for a fuel injection device according to the present invention, the fuel correction by the boost compensator and the aneroid compensator can be simultaneously performed by using the single correction link.

That is, the fuel compensation by the boost compensator and the fuel compensation by the aneroid compensator are mutually opposite functions, and the push compensator and the aneroid compensator push the boost pressure of the turbocharger or the fuel compensation of the aneroid compensator according to the atmospheric pressure. When the correction link is brought into contact with the rod, the rod is rotated around the rotary fixed shaft like a seesaw, and the control rack of the fuel injection device can be controlled in the direction of increasing or decreasing the fuel injection amount. .

[Embodiment] Next, an embodiment of the present invention will be described with reference to FIG.

FIG. 1 is a sectional view of a fuel correction device 1 for a fuel injection device according to an embodiment of the present invention. The fuel correction device 1 for a fuel injection device 1 is a cover hounds 3 of an arbitrary fuel injection device 2.
Has an aneroid boost compensator housing 4 attached to the side of the.

This aneroid boost compensator housing 4 is provided with a boost compensator 5 and an aneroid compensator 6 in parallel with each other.

The boost compensator 5 corrects fuel according to boost pressure from a supercharger (not shown) such as a turbocharger, and is interposed between the aneroid boost compensator housing 4 and the boost housing cover 7. Boost pressure chamber 9 and spring chamber 10 defined by the boost control diaphragm 8
The boost pressure from the supercharger is taken into the boost pressure chamber 9 through the boost pressure intake 11.

A boocon push rod 12 is reciprocally slidably arranged so as to come into contact with the boocon diaphragm 8. Also,
The boo-con push rod 12 is constantly urged to the left and right in the figure by the boo-con spring 14 interposed between the boo-con spring seat 13 and the boo-con diaphragm 8.
Further, a boo-con start increasing spring 16 is also arranged between the supporting member 15 of the boo-con push rod 12 and the boo-con push rod 12 so that the boo-con push rod 12 is always urged to the right in the figure.

An adjusting knob 17 is provided on the outside of the boost housing cover 7 so that the setting position of the boocon diaphragm 8 can be adjusted.

Further, the opening 18 is formed in a part of the aneroid boost compensator housing 4 and can be opened and closed by a bolt 19 so that the position of the boocon spring seat 13 can be adjusted. Further, a stopper 20 for adjusting the position of the boocon spring seat 13 is attached to the support member 15.

A plate 21 is attached to the end of the boocon push rod 12 above.
Is attached, and one end 22A of the correction link 22 is brought into contact with the plate 21.

The correction link 22 is rotatable around a rotary fixed shaft 23, and the aneroid compensator 6 is disposed below the rotary fixed shaft 23 in the lower part of the figure.

The aneroid compensator 6 corrects the fuel in accordance with the atmospheric pressure. The aneroid housing cover 24 is fixed to the aneroid boost compensator housing 4, and an opening hole 25 is formed to open the atmosphere.

A support member 26 is attached to the aneroid housing cover 24.
The anecon push rod 27 is reciprocally slidable via the. The anecon bellows 28 is fixed to the anecon push rod 27, and the anecon spring 29 is provided between the anecon bellows 28 and the aneroid housing cover 24.
Is installed. An adjusting screw 30 is brought into contact with the annex bellows 28 so that the setting position of the annex bellows 28 can be adjusted.

The other end 22B of the correction link 22 is brought into contact with the end of the Annecon push rod 27. Further, the rack push rod 31 is brought into contact with the other end 22B of the correction link 22.

A return spring 32 is interposed between the rack push rod 31 and the combustion injector cover housing 3. Further, the rack push rod 31 is connected to the control rack 33 of the fuel injection device 2,
The amount of movement can be controlled.

In the above configuration, when the rack push rod 31 moves to the fuel injection device fuel correction device 1 side, the injection amount Q increases due to the movement of the control rack 33, and conversely, when it moves to the fuel injection device 2 side, the control rack 33 moves. The injection amount Q decreases due to the movement to the opposite side.

That is, in terms of the function of the boost compensator 5, boost pressure from a supercharger such as a turbocharger is taken into the boost pressure chamber 9 from the boost pressure intake port 11, and the boot compensator spring 14 and the boocon starting increasing spring 16 are provided. The boo-con diaphragm 8 and boo-con push rod 12 move to the left in the figure by overcoming the set force of. Therefore, the plate 21 and the correction link
The end 22A of 22 can be separated from each other, but the biasing force of the return spring 32 at the portion of the push rod 31 for the rack causes the correction link 22 to rotate counterclockwise around the fixed shaft 23 for rotation. It rotates until it abuts 21, and the push rod 31 for rack moves in the injection amount increasing direction.
The control rack 33 of the fuel injection device 2 moves to the right in the figure, and the fuel injection amount Q is increased.

Further, since the fuel injection amount is increased at the time of starting the diesel engine, the counterclockwise rotation of the correction link 22 due to the right movement of the rack push rod 31 for this increase is prevented from increasing at the time of starting. After the fuel injection amount has been increased, the boo-con start-up increasing spring is used to return to the original position.
16 acts (the boo-con push rod 12 and the boo-con diaphragm 8 are separated from each other during this increase in the starting amount).

The function of the aneroid compensator 6 will be described. When the atmospheric pressure at a low altitude, for example, from the open hole 25 is introduced into the anecon bellows 28, the anecon bellows 28 expands and contracts, but one side portion thereof is adjusted by the adjusting screw 30. Since the expansion / contraction force is fixed, the expansion / contraction force overcomes the biasing forces of the annex control spring 29 and the return spring 32, and moves the annex control push rod 27 to the left in the figure.

Therefore, at this time, the rack push rod 31 is moved in the injection amount decreasing direction across the correction link 22, and the control rack 33 of the fuel injection device 2 moves to the left in the drawing to decrease the fuel injection amount Q. Will be made.

As described above, when the fuel injection amount is reduced by the action of the bellows bellows 28, the boost control push rod of the boost compensator 5 is reduced.
Even if 12 moves in the injection amount increasing direction, the plate 21 and the end portion 22A of the correction link 22 separate from each other, so that the movement in the injection amount increasing direction is performed by the rack push rod 31 via the correction link 22. Therefore, the function of the Annecon compensator 6 has a higher priority.

In the above embodiment, the boost compensator 5 is of the conventional diaphragm type, but a solenoid may be used. Further, although the aneroid compensator 6 is of a conventional bellows type, a solenoid or a linear motor may be adopted.

[Effects of the Invention] As described above, according to the present invention, the boost compensator and the aneroid compensator can be respectively acted on both ends of one rotatable correction link. With the configuration, the boost compensator and the aneroid compensator do not interfere with each other, and the function of increasing and decreasing the fuel injection can be exerted on the fuel injection device.

[Brief description of drawings]

FIG. 1 is a sectional view of a fuel correction device 1 for a fuel injection device according to an embodiment of the present invention. 1 ... Fuel correction device for fuel injection device 2 ... Fuel injection device 3 ... Cover houning 4 ... Aneroid boost compensator housing 5 ... Boost compensator 6 ... Aneroid compensator 7 ... Boost housing cover 8 ... … Boocon diaphragm 9 …… Boost pressure chamber 10 …… Spring chamber 11 …… Boost pressure inlet 12 …… Boocon push rod 13 …… Boocon spring seat 14 …… Boocon spring 15 …… Boocon push rod 12 support member 16… … Boocon start increasing spring 17 …… Adjustment knob 18 …… Opening 19 …… Bolt 20 …… Stopper 21 …… Plate 22 …… Compensation link 22A …… Compensation link 22 one end 22B …… Compensation The other end 23 of the link 22 ... the fixed shaft for rotation of the correction link 24 ... the aneroid howe Cover 25 …… Opening hole 26 …… Supporting member 27 …… Anecon push rod 28 …… Anecon bellows 29 …… Anecon spring 30 …… Adjusting screw 31 …… Rack push rod 32 …… Return spring 33 …… Control rack Q ...... Fuel injection amount

Claims (1)

(57) [Claims] 1. A fuel compensator for a fuel injection device, comprising a boost compensator for compensating fuel according to boost pressure from a supercharger and an aneroid compensator for compensating fuel according to atmospheric pressure. The boost compensator and the aneroid compensator are arranged side by side in the housing of the fuel injection device in close proximity to each other, and the push rod of the aneroid compensator is arranged to face the push rod for the control rack of the fuel injection device. A rotary fixed shaft disposed between the boost compensator and the aneroid compensator, and rotatable around the rotary fixed shaft, and one end of the rotary fixed shaft is attached to a push rod of the boost compensator. Abut the boost compensator Operation of the push rod of the control rack can be transmitted to the other end, and the other end of the push rod is arranged between the push rod for the control rack and the push rod of the aneroid compensator. And a push rod of the aneroid compensator so as to be able to transmit the operation of the push rod of the aneroid compensator to the push rod for the control rack, and A fuel correction device for a fuel injection device, comprising: a correction link capable of transmitting the operation of the push rod of the boost compensator to the push rod for the control rack.