JPS59192832A - Electronically controlled governor for internal- combustion engine - Google Patents

Abstract

PURPOSE:To reduce the size of an actuator for controlling the injection quantity of an electronically controlled governor used in an internal combustion engine and to raise the governor controlling accuracy, by disposing the actuator and an injection quantity sensor concentrically with a control rack. CONSTITUTION:The injection quantity of a fuel injection pump 1 is controlled by moving a control rack 13 of the pump 1 along a horizontal line 0-0. A core 23 supported in the space formed on the inside of a solenoid 21 of a control actuator 20 and a potentiometer 30 constituting an injection quantity sensor are disposed concentrically with each other, in respect of the line 0-0. By employing such as arrangement, it is enabled to prevent twisting and rattling of component parts, to reduce the size of the actuator and to raise the governor controlling accuracy.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronically controlled governor for an internal combustion engine, and aims to reduce the size of an actuator and ensure high governor control accuracy.

For example, in the α-child control governor of Diesel/I/engines, the core of the actuator is connected to the control rank of the fuel injection pump, and the core of the actuator is freely slidable in the center of the cylindrical solenoid. A method has been adopted in which the injection amount of the fuel injection pump is controlled by rotating the actuator, but if the link system between the actuator and the control rank becomes complicated, it will cause many twists and jerks.

In other words, the control rank and actuator solenoid are eccentric, I+'+J J Ifil @
The two are connected by L-shaped sections and are interlocked by gears. However, when L-shaped breakers are used, distortion is likely to occur due to bending moments, and if gears are used, bank crunch is unavoidable.In either case, it is difficult to adjust the rank position to positive (11r), and the characteristics Strictly 1 to 1!li
'It was difficult to control. Also, fuel injection pump 1
Since the harpoon thread does not operate smoothly, problems such as hunting at the gate and unstable torque curve occur. In order to avoid such problems, an actuator for the doll is required, which increases the cost.

In order to purify the link system of the vehicle, Akira Mizumoto installed a 1-J device with a renoid part and a part of the sensor coaxially with the control rank, which made it possible to downsize the shear actuator and increase the cost. Governor ib″14 purity I+ff
It has the advantage of preserving fl.

In addition, in electronically controlled governors, errors due to noise from the outer cylinder ≦, overheating of the actuator coil, etc.
By J+, it is necessary to set up an emergency device for overruns by Sudeink. In response to this, in the second invention, the actuator and the control rank of the fuel injection pump are connected via an extension j'F joint consisting of a spring-S mi loose member, and The stop lever for the natural shutoff Ji has been improved so that it can be operated by a system separate from the electronic governor control system (solenoid for the parts, remote control cable, etc.), so that β gold can be achieved. Yo!Ill explain.

In Figure 1, which shows the vertical [f7r side direction;
The cabana chamber 6 inside the governor cover 4
A camshaft 7 protrudes from the front end of the camshaft 7, and a disc 8 for measuring the number of rotations is held by a NAND 9 at the front end of the camshaft 7. The illustrated disk 8 has a notch 10 with a rectangular cross section on its outer periphery, and a rotation sensor 11 is located close to the governor cover 4 facing the cutoff IO as shown in FIG. It is determined. The rotation sensor 11 pulses 16 the magnetic field generated by the passage of the notch 10.
The number of pulses per unit time or pulse period is measured by an arithmetic circuit (not shown) per unit time.

Pump l in the figure is knock 13e water half j: 5J O-0
Shiransha 14 by polycrystalline after Ijq along
It is a one-stage E4-type engine that controls fuel injection by rotating the engine. Rank 13 has pin 1 on both ends
Expandable joint 18 via Rondo 17 to accommodate 5.16
It is connected to the rear joint piece 18a'.

At the IJU end of the governor cover 4, a solenoid 21 of an actuator 20 for controlling the injection amount is fixed by a plurality of bolts 22, and a core 23 is connected to the line 0 between the solenoid 21 and the medium flame. -0 is slidably supported on the comrades. The end 24 that is integral with the core 23 is a member that forms the front joint piece of the joint 18 and is connected to the actuator main body 20.
a, and a spring receiving bushing 2 is slidably supported on the rear opening.
5 is a screw #L, a rond 26 integrated with the joint piece 18a is slidably fitted into this bushing 25, and a coil spring 28 is inserted between ItJ' at the bent end of the wand 26 and the bushing 27 and the bushing 25. It was shortened, resulting in Shicore 23 and Rank 13.
are separated in the direction of approaching each other.

The rond 29 integrated with the gripping tube 24 connects the inside of the solenoid 21.
The bearing 32 is extended in the jq direction. In 6 minutes, the actuator body 208K is slidably supported, the front part 1 is drawn out into the potentiometer 30 (operating transformer), and the 1d measuring piston 31 is placed at the front end.

A coil spring 33 is installed between the core 23 and the bearing 32, so that the core 23 is normally extended toward the rear on the rack 13 side. 34.35 is the cable, cable 3
4 fully connects the potentiometer 30 and the microcomputer (Figure i, f), and supplies rank position No. 16 to the microcomputer. Google) v35 is solenoid 2
1 and the microcomputer, and connect the core 23 to the super link 3.
The role of supplying the output to move to the side position against the elastic force of 3! 'j', fulfills 1.

Extension, )F The rear joint piece 18a of the valley joint 18 is connected to the stomp lever 37 separately from the operating system of the actuator 20.
Alternatively, it can be manually driven backwards. bottle 16
The rear surface 37a of the upper end of the fork-like stop lever 37 is opposed to both of the stopper portions of the stop lever 37, and the stop lever 37 is fixed to the lower end boss portion of the stop lever 37.
8 (r:f, rotatably supported by 1d on the governor cover 4; an operating lever 39 (second
(Fig.) is fixed and burnt. The operating lever 39 has a stripe rim 400 elasticity in the middle part and a l"c agent ball 41.
I+111, detent ball 41 is cabana cover 4
The operating lever 39 is held in the standby position shown in FIG. The upper end of the operating lever 39 is connected to a disconnection solenoid, remote control cable, etc. (not shown).

While the engine is running, the rotation speed is determined by the rotation sensor 11, and the position of the cylinder 13 is determined by the position of the potentiometer or differential transformer (load during operation, injection amount at startup, etc.). Torque (corresponding to 0.1) is detected, and the rotational speed of the engine determined by each sensor,
Signals such as the rank position are supplied to the microcomputer and given by the control lever (Fig. 7J < not shown) to maintain the set rotation speed; . 1.61' The small moving finger No. 16 is supplied, and the actuator 20 operates. That is, when the rotation speed is greater than the set rotation speed, the power supplied to the solenoid 21 is reduced so that the core 23 moves backward, and when the rotation speed decreases below the set value, the solenoid 21 is reduced so that the core 23 moves forward. −＼ supply α power increases.

If a malfunction occurs due to external noise, actuator coil (solenoid) overflow or part of the actuator coil (solenoid) during operation, or an emergency small head due to overrun by the stick,
Using a system different from the control system of the electronic control governor (solenoid, remote control cable, etc.), turn the strike brakeper 37 in the direction of arrow S in Fig. Drive backwards (fuel depletion side) and cant the fuel.

As explained above, in the present invention, the actuator 2o for controlling the injection amount and the injection amount sensor (-
Since the differential transformer 3o:) is placed in correspondence with the control rank 13 of the pump L, the pump control system operates smoothly and engine hunting is prevented because there is no twisting or play in each part. This can be reduced as much as possible. Also, the torque curve becomes constant, and the performance of 'A' is improved. Furthermore, for the above-mentioned reason, it is possible to downsize the actuator 2o.

By operating the stomp lever 37 from a system Vζ that is separate from the control system of the Toyo 1i111-governor 3, only the rear joint piece 18a of the Nobuyoshi Kotani 18 is driven away, reducing the fuel consumption of the rank 13. If you move it quickly to the side, it will sharpen, making it easier to cant the fuel and ensure safety in an emergency.

[Brief explanation of the drawing]

Figure 1 is: Narukami ["Side view of course, Figure 21 is a view from the 1st arrow of the 11th row that includes a partial vertical cut. 1.
...Fuel injection pump, 13...Control rank,
18... Nobue fF Valley'A, :: Hand, 18a... Rack side joint piece, 2o... Actuator, 37... Stone braker patent applicant 8'Mar Diesel Co., Ltd. 1. Agent: Masutoshi Daihirin Shitaka;・.

Claims (2)

[Claims] (1) In a so-called electronically controlled governor that arbitrarily controls the internal combustion engine's rotational speed, working load condition, and fuel injection amount during starting, etc. using a microcomputer based on the feed bank of each part, 1@ actuator for injection amount control is used. An electronically controlled governor for an internal combustion engine, characterized in that an injection amount sensor is placed in the same window as the control rank of the fuel injection pump. (2) The rotational speed of the internal combustion engine, the load condition during work, the fuel injection amount at startup, etc. are arbitrarily controlled by a microcomputer using the feed bank of sensors in each part. Actuator and injection sensor for fuel injection, j? It is placed in the same window as the control rack of the engine, and an extension dF valley joint is inserted between the actuator and the control rack, and the stop lever is secured to the armature on the rank side, allowing only the control rack to stop fuel in emergency stations, etc. An electronically controlled governor for an internal combustion engine characterized by being able to be driven to the side.