JPS59215925A - Temperature correcting apparatus for idle revolution- number in governor apparatus of engine - Google Patents

Abstract

PURPOSE:To reduce warming operation time and reduce fuel consumption amount by installing a temp. sensing operation device for correcting the fuel flow-rate in accordance with engine temp., midway in a passage for transmitting the movement of a governor lever into a control rack. CONSTITUTION:When an engine is started by positioning an accelerator lever 11 at idle position, a bimetal 15 contracts when the engine is cold, and a control rack pin 16 is shifted to the fuel increasing direction (rightward), and the discharged fuel from a fuel injection pump 5 increases. As the engine tem. gradually increases and the bimetal 15 lengthens, the control rack pin 16 shifts to the fuel reduction side (leftward), and the discharged fuel decreases. When warming operation is carried-out sufficiently and the free edge part of the bimetal 15 contacts with the head part of an adjusting bolt 17, the control rack pin 16 is controlled with high accuracy, following the swing of a governor lever 13.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to reduce the idle rotation time when starting an engine in cold conditions, and to lower the idling rotation speed after warming up to reduce fuel consumption. Regarding the idle speed correction device, which uses a warming actuator to change the temperature, the aim is to improve the accuracy of the temperature correction of the idle speed, thereby sufficiently shortening the operating time and at the same time minimizing fuel consumption. shall be.

Conventionally, there is a device of this type as shown in FIG.

That is, the temperature-sensitive actuator 21 detects that the cooling water temperature of the water jacket 20 is low, contracts, and advances the idle rotation setting stopper 25 to the high rotation setting position via the link 22 and release wire 23. At this position, the stopper 25 or the regulating lever 2.1 is received.

In the case of this tM construction, the strong governor force of the governor is applied to the governor lever, governor spring (none of which are shown), and speed regulating lever 24 to act on the temperature-sensitive actuator. As a result, in the temperature-sensitive actuator, the strong governor force acts as an actuation resistance, so the actuation accuracy decreases, and the error range of the temperature correction of the idle speed increases as shown in FIG.

That is, in Fig. 1, reference numeral 30 indicates an appropriate correction value for temperature correction of the idling speed, 31 indicates a limit value of the error range α, and 32 indicates a lower limit value. The more the correction value is toward the upper limit value 31 of the error range, the higher the engine speed becomes, and the more fuel is wasted both at high idle speed during rocky operation and at low idle speed after warm-up. On the contrary, the more the lower limit value 3211111i is biased,
The rotation speed becomes too low, the warm-up time due to high idle speed becomes long, and if! There is a problem with the engine stopping due to lack of power at low idle speeds after surfing.

The present invention has been proposed to solve the above-mentioned problems. By inserting a temperature-sensitive actuator in one part of the lever on the way to the fuel regulator, the temperature-sensitive actuator is completely freed from the operating resistance caused by the strong governor force and reduces the slight sliding resistance of the fuel regulator. The error range for the temperature correction of the idling rotation speed shown in Fig. 4 is narrowed down to a point where the temperature correction can be made as close to the appropriate correction value as possible.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

Fig. 1 is a longitudinal sectional side view showing the structure of the speed governor part installed in a vertical diesel engine. A gear chamber is formed in series with this on the Air surface.

Pump chamber 1 has an opening on its upper surface [1]
A fuel injection pump 5 is attached to I'l 7+, and this fuel injection pump (fuel control supply device) 5 is operated by a plunger 9 pushed by a cam 8 of a pump camshaft 7 driven by a cam gear 6. fuel is pumped into the combustion chamber (not shown).

The cam gear 6 is located in the gear chamber 3, and the cam gear 6
A centrifugal governor 10 is incorporated in the.

This centrifugal force lever 10 controls the rotational speed of the engine in balance with the tension of the governor or link 2 whose tension is adjusted by an accelerator lever 11 pivotally supported on two sides of the gear chamber 1. It constitutes a part of a so-called mechanical governor device G for adjustment.

Then, the swinging lever 1 is controlled by the governor device G.
3 is provided with an idle rotation speed temperature correction device 14.

As shown in FIG.
between the tip 13a of the stupid lever 13 and the fuel injection pump 5
It is interposed between the fuel control rack pin (fuel adjustment device) 16 of the
It is set between the head 13 of an adjustment bolt 17 that passes through the upper part and is screwed onto one end of the governor lever 13 and a lock nut 113 that can be adjusted forward and backward on the adjustment bolt 7. It has become.

The operation of the idle rotation speed correcting device 14 configured as described above will be explained next.

When the accelerator lever 11 is moved to the idle rotation position 1 and the engine 2 is started, when the engine 2 has cooled down, the bimetal] 5 detects the low temperature and turns the control rack pin 16 to turn the fuel increase side (Fig. -1-Right side) Move to r to increase the amount of fuel discharged from the fuel injection pump 5, and make the Ennon E rotate at high speed idling to shorten the warm-up time.

In this way, as the engine E gradually warms up, the bimetal 15 or the hunt roll rack pin 16 is moved to the fuel reduction side (left side in Figure 1) I-5 to reduce the discharged fuel and start the engine E. Reduce idle speed.

When the heating operation is carried out sufficiently and the temperature rises by -1, the end 15a of the bimetal 15 on the side that receives the control rack pin 16 is securely received by the head IS of the reinforcing bolt 17. Then, the swing of the V-1 rear governor lever 13 is followed to control the load roll rack pin 16 to a high viscosity.

Since the present invention is configured and operates as described in -1-, it has the following effects.

The temperature-sensitive actuator does not bear the burden of a strong governor force and is completely free from the extraordinary operating resistance caused by the governor force, and only receives the very light operating resistance of the fuel regulator. The accuracy of temperature sensing operation has been greatly improved, and the error range for temperature correction of idling speed has been greatly narrowed, making it possible to correct temperature according to the correct correction value.

As a result, the heat caused by high idle speed (during heavy driving,
This eliminates the waste of fuel when the rotation speed is too high and the lack of warm-up air when the rotation speed is too low, and warm-up is quickly completed without wasting fuel.

Furthermore, at low idle speeds, it is possible to eliminate fuel wastage due to too high engine speeds and engine stoppages due to low engine speeds, resulting in economical and stable engine rotation. , 2 and so on.

In addition, the temperature-sensitive actuator does not suffer from strong burns,
Since it is only necessary to overcome the slight operating resistance of the fuel regulator, the entire device for temperature-sensitive correction of the idle speed can be made small and simple, while requiring only a small output device, and is inexpensive. can be implemented.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional side view of a power burner device part of a diesel engine equipped with an idle speed temperature correction device according to the present invention, Fig. 2 is an enlarged view of the main part, and Fig. 3 is a plan view showing a conventional example. , FIG. 4 is a graph showing the relationship between idle speed and temperature. G...Governor device, r...Fuel increase side, 1. ...
Fuel reduction side, 2... Engine, 5... Fuel control supply device (fuel injection pump), 10... Governor, 11...
Speed regulating lever, 12... Governor spring, 13...
Power: Banana Lever, 16...Fuel adjustment. 8-

Claims (1)

[Claims] 1. The governor spring 12, the governor 10, and the fuel adjuster 16 of the fuel control supply device 5 are interlocked and connected to the governor lever 13 of the governor device G of the engine 2, and the governor spring 1
The amount of fuel supplied by the fuel control supply device 5 is controlled by controlling the fuel regulator 16 through the vanadyl 13, which increases the balance between the tension of the drum 2 and the output of the drumstick 10.
The engine 2 is configured to maintain a constant rotational speed, and the governor spring 12 is connected to the speed regulating lever 11, and the speed regulating lever 11 adjusts the force of the governor spring 12. In an engine governor device configured to be able to change settings, the tension of the governor spring 12 out of the force vanadyl 13 is equal to the tension of the governor spring 12.
A temperature-sensitive actuator 15 is interposed in a part of the lever that transmits the balance with the zero output to the fuel regulator 16, and the temperature-sensitive actuator 15 moves the fuel regulator 16 to the fuel increasing side r as the detected temperature is lower. This is an idle speed temperature correction device in an engine vana device, which is set so that the higher the value, the more the fuel is reduced.