JPH0536042U - Fuel injector - Google Patents

Abstract

(57) [Summary] [Purpose] The RSV type governor uses a stop lever to facilitate output control. [Structure] A stop lever of an RSV type governor is brought into contact with two stoppers to control the maximum position of a control rack of a fuel injection pump in two steps or arbitrarily. [Effect] With a simple and inexpensive structure, the engine output can be switched in two steps or arbitrarily.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fuel injection device for a high speed diesel engine, and relates to a method for setting a maximum injection amount according to the load of the engine.

[0002]

[Prior Art]

 In order to improve the operability of a machine such as a construction machine, reduce the fuel injection amount of the engine, and improve the economy of the machine, for example, as shown in FIGS. The economy mode B output is set and the operator is made to select it according to the work situation. The two-stage output mode can be easily set by using a known electronic governor. In the RSV type governor, which is the most mechanical type and is used for industrial machines, the adjusting lever 16 is driven by the electric motor 20 as shown in FIGS. 6 and 7, and the stop lever as shown in FIGS. 22 may be driven by an actuator 27 of an external electronic control unit.

6 and 7 show a known RSV type governor, in which a control block 4 including a flyweight 5 and a full load stopper 6 are arranged at the rear end of a cam shaft 3 of a fuel injection pump 1. A guide lever 9 is supported on the tension lever 10, the lower end of which is connected to the control block 4 at a point B, and a floating lever 7 having a fulcrum C at the point A is dead or injured. A start spring 13 is attached to the upper end of the floating lever 7 and connects the control rack 2 at a connection point D. The swivel lever 11 moves integrally with the adjusting lever 16 and a governor spring 12 is mounted between the swivel lever 11 and the guide lever 10. Further, an adapter spring 14 and an idle sub spring 15 are mounted respectively. FIG. 6 shows the case of the power mode, in which the tension lever 10 is pulled by a large force of the governor spring 12 and hits the full load stopper 6 and the adapter spring 14 is compressed in a constant state. When the operator makes a selection according to the work situation, the electric motor 20 operates and the adjusting lever 16 can be moved to the economy mode via the rod 19. In FIG. 7, 17 is a maximum speed stopper, 18 is a stop adjusting screw, and 21 is an operating lever.

8 and 9 show a known RSV governor with a stop lever, in which a stop lever 22 disposed below is connected to a floating lever 7 at a point E via a lever 8. Therefore, the engine can be stopped by rotating the stop lever 22 having the fulcrum C as the clockwise direction. Therefore, it is possible to connect the stop lever 22 to the actuator 27 of the external electronic control device and set an arbitrary output mode via the rod 26. The structure and function of the RSV type governor with a stop lever are the same as those shown in FIGS.

[0005]

[Problems to be solved by the device]

 In such a conventional fuel injection device, when performing a two-stage output setting, an expensive control device is required, which causes a problem of a large cost increase. The present invention was made for the purpose of solving this problem at a low cost without major modification.

[0006]

[Means for Solving the Problems]

 The present invention has been made to achieve the above-mentioned object, and is an RSV type centrifugal governor of a row type fuel injection pump of a diesel engine, which is connected to a control rack 2 of a discharge amount adjusting member of the injection pump, A control block 4 which is moved by a weight 5 in relation to the number of rotations, a guide lever 9 which supports both ends of a tension lever 10 together with the control block 4, and a pin which is rotatably supported at an intermediate portion of the guide lever 9. A floating lever 7 connected to the floating lever 7, a control mechanism formed by connecting the control rack 2 to a pin supported at the tip of the floating lever 7, and a stop for stopping the engine at the lower end of the floating lever 7. In the centrifugal type governor that is formed by connecting to the lever 22A, it is connected to the operating lever 21 of the engine. The adjusting lever 16 is regulated to a predetermined maximum injection amount position by the maximum speed stopper 17, and the stop lever 22A is operated in the injection amount decreasing direction to set an arbitrary maximum injection amount adapted to a predetermined load of the engine. Set the control rack position to. Further, according to claim 1, the stop lever 22A is operated, and the control rack position of the maximum injection amount adapted to a predetermined load of the engine is fixed to the power mode stopper 24A fixed to the stop lever 22A and the rear portion of the governor case. The economy mode stopper 25A described above is provided and controlled.

[0007]

[Action]

 With the above configuration, two-step output control can be easily performed.

[0008]

【Example】

 1 and 2 show the configuration of the present invention, FIG. 3 shows the characteristic diagram of the RSV governor of the present invention, and FIGS. 4 to 5 show the output curve of the present invention. 1 and 2 have the same structure and operation as the known RSV type governor shown in FIGS. 8 to 9 except for the stop levers 22A and 23A, the power mode stopper 24A, the economy mode stopper 25A, and the adjusting motor 27A. . 1 to 2, the operator operates the wiper motor 27A according to the work situation and swings the limiting levers 22A and 23A through the rod 26 integrally connected to the power mode Hp shown in FIGS. The maximum position of the control rack of the fuel injection pump can be controlled by bringing it into contact with the stopper at any set point of economy mode He. Needless to say, the stop levers 22A and 23A may use the conventional stop levers as they are, or the stoppers 24A and 25A may be the conventional stop levers for which the positions have been changed. . FIG. 5 shows a characteristic diagram of the RSV governor of the present invention. The adjusting lever 16 is pushed down until it hits the maximum speed stopper 17, and the stop levers 22A and 23A are in the power mode Hp or the economy mode He (P).₁, P₂ Indicates the position of the control rack when the fuel injection pump speed is increased by setting each rated output point).₁→ B₁  .... Amount of extrusion at start with start spring A₂→ B₂  B₁→ C₁  .... When the adapter spring acts B₂→ C₂  C₁→ D₁  .... At equilibrium C₂→ D₂  D₁→ E₁  .... During high-speed control D₂→ E₂  Is shown.

[0009]

[Effect of the device]

 As described above, the fuel injection device for a high-speed diesel engine of the present invention does not require an expensive electronic control device, has a very simple structure, and has two stages of engine output and any set, so that the cost is particularly reduced. A great deal of effect can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram of the RSV governor of the present invention.

FIG. 2 is an outline drawing of the RSV type governor of the present invention.

FIG. 3 Output curve of the present invention

[Fig. 4] Output curve of the present invention

FIG. 5 is an RSV type governor characteristic diagram of the present invention.

FIG. 6 is a block diagram of a conventional RSV type governor.

FIG. 7 is a conventional RSV type governor outline drawing.

FIG. 8 is a block diagram of a conventional RSV type governor (with a stop lever).

[Fig. 9] Conventional RSV type governor (with stop lever) outline drawing

[Explanation of symbols]

 22A, 23A Stop lever 24A Power mode stopper 25A Economy mode stopper 27A Adjustment motor

Claims (2)

[Scope of utility model registration request] 1. An RSV type centrifugal governor for an in-line fuel injection pump of a diesel engine, the RSV type centrifugal governor being connected to a control rack 2 of a discharge amount adjusting member of the injection pump, and moved by a flyweight 5 in relation to a rotational speed. A control block 4 and guide levers 9 supporting both ends of a tension lever 10 together with the control block 4,
A floating lever 7 connected to a pin rotatably supported at an intermediate portion of the guide lever 9, a control mechanism formed by connecting a control rack 2 to a pin supported at a tip end of the floating lever 7, and In the centrifugal governor formed by connecting to the stop lever 22A that stops the engine at the lower end of the floating lever 7,
The adjusting lever 16 interlocked with the operating lever 21 of the engine is restricted to a predetermined maximum injection amount position by a maximum speed stopper 17, and the stop lever 2 is also provided.
A fuel injection device characterized in that the control rack position is set to an arbitrary maximum injection amount adapted to a predetermined load of the engine by operating 2A in the injection amount decreasing direction. 2. The stop lever 22 according to claim 1,
When A is operated, the control rack position of the maximum injection amount adapted to the predetermined load of the engine is set to the stop lever 22.
A fuel injection device characterized in that a power mode stopper 24A fixed to A and an economy mode stopper 25A fixed to the rear part of the governor case are arranged and controlled.