JPS60138246A - Electronic control type governor control device - Google Patents

Abstract

PURPOSE:To provide a function similar to an auto-cruise without adding a special-purpose hardware, by providing such an arrangement that the fuel injection amount of an engine is controlled by operating an accelerator pedal irrespective of engine rotational speed and the degree of load. CONSTITUTION:The relationship between the depressing force and depressed degree of an accelerator pedal is set to obtain a characteristic having an inflextion point P such that the depressing degree largely varies when the depressing force increases to a certain value, but is does not largely varies thereafter. The depressing degree of the accelerator pedal 1 is detected by a sensor 2, and a governor 5 is controlled in accordance with the output of the sensor 2. For example, when the output of the sensor 2 is in the idle position, the rotational speed of the engine is controlled to be maintained at a specified idling rotational speed. When the position of the accelerator pedal is in the vicinity of the inflextion point P, auto-cruise control is carried out. With this arrangement, the control of constant speed running may be made only by operating the accelerator, in addition to the control of acceleration and deceleration.

Description

[Detailed Description of the Invention] [Technical Field to which the Invention Pertains] This invention relates to an electronically controlled governor for a vehicle tasel engine, and in particular, to an electronically controlled governor for a vehicle tasel engine, which is capable of not only accelerating and decelerating only by operating the accelerator, but also capable of performing constant cruise (auto cruise). This invention relates to a governor control device of the 'Kinko tfllJtu41 type which can be provided with various functions.

[Prior art and its problems]

Some conventional electronically controlled governors are equipped with a so-called auto-cruise function, but most of them are activated with a manual switch (thus, the operation is cumbersome and It is necessary to provide a human-powered boat to input the Gogo to the controller via various switches such as a clutch switch and a brake switch, which results in cost or space separation.Also,
In the all-speed type control system, the fuel injection lid increases until it reaches nearly full load when the accelerator pedal is slightly depressed, which has a negative effect on the fuel consumption rate (fuel efficiency rate).

[Purpose of the invention]

This invention was made in view of this situation, and uses an electronically controlled governor to control the engine rotational speed.

By controlling the fuel injection amount by operating the accelerator pedal regardless of the load size, electronic control enables the same function as auto cruise without adding special hardware. The purpose of the present invention is to provide a type governor control device.

[Key points of the invention]

The cost, accelerator pedal depression force and pedal distance (displacement M)
It has a characteristic that the pedal stroke changes greatly up to the pedal force between 2 and 2, but after that it does not change much. When it is near the curve point, it is at the point where auto cruise control is performed.

[Embodiments of the invention]

Figure 1 is a schematic configuration diagram showing an embodiment of the present invention, the mIA diagram is a diagram showing the relationship between the accelerator pedal depression force and the pedal distance (displacement it), and the MIB diagram is the diagram showing the accelerator sensor output and the control to be performed at that time. 810 is a flowchart for explaining the operation of FIG. 1, and FIG. 1D is a graph showing the relationship between engine rotational speed and fuel injection amount.

In the m1 diagram, 1 is an accelerator pedal, 2 is a sensor that detects the distance of the pedal 1, At;l is a microcomputer-like calculation fi+!l Thl (control unit)), 4 is an engine, 41i, t are engine rotational speed sensors, and 5 is a governor.As shown in Figure 1A, the relationship between the pedal force on the pedal 1 and the pedal stroke 6 shows that the pedal stroke θ also changes greatly until the pedal force is reached. In order to obtain a characteristic with an inflection point P that does not change much, the μ-bale is constructed of a pedal 1 6. Specifically, for example, when the driver presses the pedal 1
Try to reach the inflection point P by simply placing your foot on the . The sensor 2 detects the stepping distance θ of the flat wheel 1 as shown in FIG. 1llll# of the governor 5 (controls the fuel injection lid depending on the control rack position).

That is, when the sensor output is in the sl range shown in Figure 1B, that is, in the idle position (see MIC diagram ■),
The engine rotation speed is controlled to keep it at the specified idling speed (see Figure 1C ■), and
When it is within the range indicated by 3 (see Figure 1C O#),
Constant vehicle speed (cruise) control is performed so as to maintain the engine speed at the previous engine speed (see Fig. 1C (F)). Similarly, when in the range 82 in FIG. 1B, that is, in the deceleration position (see FIG. 1C (B)), the vehicle running resistance curve MB shown in the gID diagram is The governor 5 is controlled with the characteristic I) such that the stripe 1 is approximately parallel to the stripe 1.
(see Figure 0). Furthermore, when none of the above cases apply (see range S4 in FIG. 1B), it is a case where acceleration control should be performed, so acceleration control is performed as shown in FIG. 1C@. The %lJ groaning characteristic at this time is expressed as a curve C in FIG. 1B, which is substantially parallel to the dB of the curve, as in the case of deceleration. Note that characteristics such as curves C and LD in the MID diagram are stored in advance as a map in a memory (not shown) in the control unit 5, and therefore, when accelerating or decelerating, the characteristics such as curves C and LD of the MID diagram are The fuel injection amount is controlled accordingly. By doing this, the full load curve indicated by A in FIG. 1D will not be reached by only slightly pressing the accelerator pedal, and fuel efficiency can be improved.

〔Effect of the invention〕

According to this invention, it is possible to not only accelerate and decelerate but also drive at a constant speed just by operating the accelerator, so it is easy to use without installing special hardware in the electronic control governor, which does not have this control function. This makes it possible to add functions equivalent to this, and also brings about the advantage that fuel-saving continuous operation can be easily demonstrated. Furthermore, auto cruise can be set to either single speed or continuous speed, and can be set and reset simply by operating the accelerator pedal, which has the effect of improving operability. Furthermore, since the actual vehicle speed and the driver's intentions are always directly linked, this provides the advantage of improved safety compared to conventional systems.

[Brief explanation of the drawing]

Figure 6-8141 is a schematic configuration diagram showing an embodiment of this invention, MI
Figure 1': J, 'f is a graph showing the relationship between the pedal force on the accelerator pedal and the clearing margin (displacement value). Figure 1B is a graph showing the relationship between the accelerator sensor output and the control mode to be performed at that time. FIG. 1C is a flowchart for explaining the operation of FIG. 1, and FIG. Code explanation 1... Accelerator pedal, 2... Accelerator sensor, 6゛・'... Control unit, 4...
...Engine, 41...Engine speed sensor, 5...Governor agent Patent attorney Akio Namimoto Agent Patent attorney Kiyoshi Matsuzaki-7= Figure 1 Figure 1A IJxB figure

Claims (1)

[Claims] The relationship between the two forces and the amount of displacement is H. and an electronic control unit that controls when the pedal position is near the inflection point! When 1141 is disconnected, constant speed control is performed, and when the speed is above or below, acceleration or deceleration control is performed when the relationship between engine speed and fuel injection amount is approximately parallel to the running resistance characteristic. Electronic fii-type Kahana control device.