JPS5838331A - Device for controlling fuel injection of diesel engine - Google Patents

Abstract

PURPOSE:To enable to operate a vehicle automatically with the fuel of the necessary minimum amount if necessary by a method wherein a control system by means of a computer, capable of being selected properly into an economical running or an output running, is annexed to a normal controlling system. CONSTITUTION:A fuel injection pump 1 is controlled normally by operating an accelerator pedal 16 through levers 8, 9. When the vehicle is operated automatically, the fuel injection pump 1 is controlled by the computer 36 through an actuator 23. Here, the computer 36 may be controlled selectively into the economical running, limiting the amount of fuel injection below a given value, or into the output running, allowing the amount of fuel injection to the maximum value.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel injection control device for a diesel engine, and more particularly, to a fuel injection pump control device using a converter that stores a programmer that can appropriately select between economical driving and power driving. Regarding the fuel injection control system for diesel engines, which enables automatic operation of the vehicle when necessary. Conventionally, the control of the fuel injection pump of a diesel engine was carried out solely by the driver's intuition, by freely operating the accelerator pedal, and by using a control rack. This was done by moving the . On the other hand, the rotation speed of the fuel injection pump is
This is automatically adjusted using fly weights, but with just this adjustment, for example, when driving on a slope, you may needlessly press the accelerator pedal even though the engine speed does not increase, and the amount of fuel you press is wasted. There were drawbacks.

Also, when I wanted to reach a destination within a certain time, I would sometimes press the accelerator pedal in vain and drive faster than necessary, consuming more fuel even though I had plenty of time to spare. Also, when the vehicle is exiting a sandy or rough road, if the clutch pedal is depressed and the engine is running at high speed, then the clutch is suddenly engaged and the vehicle is attempted to start suddenly.
This has disadvantages, such as applying an impactful force to the engine and other power transmission mechanisms, damaging the engine and power transmission mechanism, and wasting fuel.

The present invention has been made to eliminate the drawbacks of the prior art described above, and its purpose is to achieve economical driving by limiting the amount of fuel injection to at least a certain value or less, and to increase the amount of fuel injection to the maximum value. The purpose is to control the fuel injection pump by a combiator that can appropriately select the permissible power output and drive, so that the vehicle can operate automatically with the minimum amount of fuel required. The aim is to allow drivers who do not like automatic driving to drive as usual. Another purpose is to prevent damage to the engine and power transmission mechanism, as well as waste caused by sudden starts, by preventing the vehicle from suddenly starting by connecting the clutch while the clutch pedal is depressed and the engine is rotating at high speed. The purpose of the present invention is to prevent fuel consumption.In short, the present invention provides an actuating member that operates the control rack of a fuel injection pump in a system different from the control path from the accelerator pedal to the control lever and the floating lever; An actuator that operates an operating member, and various operating states of the engine, fuel injection pump, and vehicle are given as inputs, and the actuator is operated to at least limit the amount of fuel injection to a certain value or less for economical driving and to maximize the amount of fuel injection. The present invention will be described below based on embodiments shown in the drawings. The fuel injection pump l that controls the rotation and speed of the engine (not shown) is connected to the governor 2. The governor 2 includes a control rack 3, a timer 4, and a plurality of injection nozzles 5. Te70-
A bell crank 11, which is an example of an operating member, is provided which is pivotally connected to a sacell control lever 9 and a bin 10 IC. One end of a rod 13 is pivotally attached to one end of the control lever 9, and an accelerator pedal 16, which is pivotally attached to a vehicle body 14 by a pivot 15, is connected to the other end of the rod via a cylinder 17. When the driver 19 operates the accelerator pedal 16, the accelerator pedal swings in the direction of the arrow M or B.

Correspondingly, the control levers 9 and 7 are arranged so that the single lever 8 swings about the pivot shaft 7.

One end of the KU control rack 3 is pivotally attached to one end of the floating lever 8, and the amount of fuel injected from the injection nozzle 5 is adjusted by moving the control rack. When Tsuk 3 moves in the direction of arrow C, the amount of fuel injected increases and the rotational speed of the engine increases, while when it moves in the direction of arrow C, the amount of fuel injection decreases and the rotational speed of the engine slows down. It's becoming. In order to detect the position of the control rack 3, a position detector z1 is provided at the other end of the control rack.One end of the bell crank 11 is pivotally connected to the fourth part of the control rack 3, *
The end is connected to an actuator 23. The actuator is provided with a diaphragm 24 connected to the other end of the bell crank 11 and a no/spring 25 that presses the diaphragm downward.The timer 4 injects fuel according to the rotational speed of the engine. By changing the timing, the best ignition timing is always maintained.

The fuel injection control valve device 27 is configured as a trap so that it can communicate with a vacuum device 29% atmospheric pressure throttle device 30 and an actuator 23 through a pipe 28, and an electromagnet 31 is provided at the top. Then, by actuating the electromagnet, the control valves 33 and 34 are moved, and when the control valve 33 is in the position shown in FIG. When the control valve 34 moves to the position shown by the imaginary line in the figure, the vacuum device 29 and the actuator 23 are connected to each other. The fuel injection control valve device 27 is controlled based on information about the operating status MK of the fuel injection pump, engine, and vehicle, and the actuator 23 is controlled by the control valve device. .

In this embodiment, the main information input to the combiator 3G is the engine rotation speed, air temperature, cooling water temperature, vehicle running speed, transmission gear selection state, cargo loading amount, required time, and target. Mileage.

It shows the distance traveled etc.

The present invention is constructed as described above, and its operation will be explained below. ・What is shown in FIG. 2 is a control block diagram, and the arrows indicate the relationships and directions of electrical signals. To explain with reference to this book, the switch SW is the 115th g1K
Turn on the control power supply E as shown by the virtual line and turn on the control power supply E.
When I put it in on 36th in the evening.

The program starts. Then, the determination circuit 37 determines whether or not automatic driving is selected, and when automatic driving is not selected, that is, when the driver selects conventional driving,
Conventional fuel injection pump l is controlled, i.e.
When you operate the accelerator pedal 16 and press it in the direction of the arrow, the cylinder 17 degrees 13. control lever 9
The control rack 3 moves in the direction of arrow C via the floating lever 8, increasing the fuel injection amount and increasing the engine speed. Conversely, when the accelerator pedal 16 rotates in the direction of arrow B, the control The rack 3 moves in the direction of the arrow, the amount of fuel injection decreases, and the rotational speed of the engine decreases.

When automatic operation is selected in the discrimination circuit 37, the combiator 3
6 sends a signal to the actuator 23, and all control of the fuel injection pump 1 is performed by the combiner 36. For example, if you want to arrive at a target point within a certain time, the time, target distance traveled, and already traveled distance are entered in advance into the storage device 38 of the combination 36. For example, the target distance traveled to the target point. Assuming that the distance is 300 km and the desired arrival time is 5 hours, the numerical values are entered into the storage device 38 of the combination vehicle 36 and the vehicle is driven.

Thereupon, the computer 36 checks the remaining distance that has already been traveled, i.e., subtracts the distance already traveled, and the desired arrival time, and determines either the economical driving pattern or the output driving pattern as appropriate. Select with .

When the economical driving pattern is selected, the fuel injection control valve device 27 is controlled so that the vehicle always travels at an economical speed. That is, the rotational speed of the engine is detected by the position detector 21 of the control rack 3, and the signal is inputted to the combiator 36. If the rotational speed of the engine increases, the electromagnet 31 of the fuel injection control valve device 27 is excited and controlled. The valve 34 moves to the position shown by the imaginary line and the vacuum device 29
and the actuator 23 communicate through a pipe 28. Then, the diaphragm 24 is sucked upward against the spring pressure of the main spring 25, and accordingly, the bell crank 11 rotates counterclockwise around the pin 10, and the control rack 3 is pulled in the direction of the arrow and the injector is activated. If the amount of fuel injected from nozzle 5 is small,
As a result, the rotational speed of the engine becomes a low engine speed.

In addition, if it takes longer than K during travel due to wheel congestion at i, an output travel pattern is selected that provides an engine rotation speed faster than the economical speed. Then, the control valve 33 of the fuel injection control valve device 27 moves to a position K as shown in FIG.
The throttle device 30 and the actuator 23 communicate with each other through the pipe 28, and atmospheric pressure is supplied from the throttle device 30 to the actuator 2.
3, and the diaphragm 24 is pressed downward. Then, the bell crank 11 rotates clockwise around the bottle 1O, the control rack 3 moves in the direction of arrow C, and the amount of fuel injected from the injector nozzle 5 increases, resulting in an increase in engine speed and output. It becomes a running pattern. In this way, the fuel injection pump 1 is controlled by the computer 36 so as to be able to appropriately select between economical driving and power driving, so that the vehicle can always be operated with the minimum amount of fuel necessary.

Furthermore, when constant speed driving is selected for automatic operation, if the rotational speed of the engine is specified, a signal is sent from the converter 36 to the actuator 23, so that the vehicle can always travel at a constant speed.

Furthermore, if the fuel injection pump 1 is controlled by the combination controller 36 so that the vehicle cannot suddenly start even if the clutch is connected while the clutch pedal (not shown) is depressed and the engine is rotating at high speed, the engine can be rotated at high speed. It is also possible to prevent damage to the power transmission mechanism and wasteful fuel consumption due to sudden starts.

Since the present invention is configured and operates as described above, the historical material injection pump is controlled by the combiator which can be selected appropriately between at least four economic driving modes and output driving mode, so that the fuel injection pump is controlled by the minimum amount of fuel required. The effect is that the vehicle can be driven automatically.

In addition, drivers who do not like automatic driving of such vehicles have the advantage of being able to select the conventional one-turn operation.In addition, drivers who do not like automatic driving of such vehicles can select the conventional one-turn operation. Since the vehicle cannot be suddenly started, it is possible to prevent damage to the engine and power transmission mechanism as well as wasteful fuel consumption due to sudden starts, making this invention extremely effective.

[Brief explanation of drawings]

The drawings relate to embodiments of the present invention; the first figure is a front view schematically showing the apparatus according to the present invention, and the second figure is a control block diagram. 3 is control rack, 8 is floating lever%9
1 is a control lever, 11 is a bell crank which is an example of an operating member, and 16 is an accelerator pedal. 23 is an actuator, and 36 is a computer. Patent applicant Hino Motors Co., Ltd. Agent Patent attorney 1) Kazuo

Claims (1)

[Claims] An actuating member that operates the control rack of the fuel injection pump in a system different from the control path via the accelerator pedal control lever and the 70-ching lever, and an actuator that operates the actuating member: the engine, the fuel injection pump, and the vehicle. Various operating states are given as inputs, and the actuator can be selectively controlled to at least economical driving in which the fuel injection amount is limited to a certain value or less, and output driving in which the fuel injection amount is allowed to reach a maximum value. A fuel injection control device for a diesel engine, characterized by comprising: