DE7634072U1 - DEVICE FOR ECONOMIC OPERATION OF A MOTOR VEHICLE - Google Patents

Description

MACHINE FACTORY

Corporation

Munich, October 26, 1976

Device for the economical operation of a motor vehicle

The invention relates to a device for economic Operating a motor vehicle, in particular a commercial vehicle with an internal combustion engine.

The cheapest fuel consumption when operating such motor vehicles is in the speed range of the maximum torque of the engine. It increases with increasing speed up to the maximum speed strong. An economical driving style is therefore achieved if it is largely avoided, in the speed range drive just below the maximum speed.

Most drivers, especially those of Nut ζ vehicles, own however, to use the maximum engine power in order to achieve a high average speed. For this reason they drive very often with the accelerator pedal fully depressed in order to achieve the highest possible speeds, which has the consequence that is constantly driven with maximum fuel consumption. Host-

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Economic driving without a noticeable reduction in average speed however, would be quite achievable if the driver had an engine speed of around 15 to 25% below the maximum would not exceed permissible.

The object of the present invention is therefore to provide a device to create, which inevitably causes the driver to use such a favorable speed range during normal driving to be selected and only to drive at a higher speed if it is absolutely necessary due to the special conditions.

To achieve this object, it is proposed according to the invention that a flexible stop be used for the accelerator pedal (= accelerator pedal) is provided, which limits the pedal travel with normal pressure on the pedal so that a speed of the internal combustion engine between 75 and 85% of the maximum speed, but further depressing the pedal if the pressure is excessive up to an end stop corresponding to the maximum speed of the internal combustion engine.

By the device according to the invention, which is a so-called Equivalent to a kickdown effect, the driver is prevented from constantly driving "full throttle" because he is doing this a disproportionate amount would have to use high foot force. On the other hand, however, the full engine power and speed is available to him if he needs it by putting too much pressure on the gas

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pedal this can pass through to the end of its entire pedal travel.

In a further embodiment of the invention it is proposed that the stop be designed in the manner of a telescopic spring strut which is provided with means for changing the lengths of the spring travel. This makes it possible to adjust the adjustment range of the To limit the accelerator pedal differently, so that the stop for different engine powers or lever ratios can be used in the linkage of the accelerator pedal.

Finally, it is proposed in a further embodiment of the invention, that the stop is adjustably attached to the vehicle.

An embodiment of a device according to the invention is explained with reference to the accompanying drawing. In the drawing shows

Fig. 1 is a schematic representation of the gas linkage

for actuating the control rod of the injection pump, an internal combustion engine in a motor vehicle,

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2 shows a stop designed as a telescopic strut, as it is used in the arrangement according to FIG. 1 and

Fig. 3 is a diagram in which the actuation force

. of the accelerator pedal or throttle linkage and the speed

j of the internal combustion engine as a function of the route

j of the accelerator pedal or throttle linkage recorded

j "are.

1 shows a toggle lever 1 that can be pivoted about a pivot point 2 fixedly attached to the vehicle, at its upper one At the end of a link rod 8 is mounted, which is connected to the accelerator pedal, not shown, of the vehicle. The other The end point of the toggle lever 1 is guided in a link 13 of a control lever 3, which at one end has a control rod 4 of an injection pump 14 is pivotally connected, at its other end to a bearing block mounted in a position shifting manner V. 15 is pivoted. One movement of the link rod 8 in the arrow directions shown causes a pivoting of the toggle lever 1 and thus a longitudinal displacement of the control rod 4 of the injection pump 14. The movable bearing block 15 is drawn from a centrifugal governor 5 in FIG Adjusted position in the horizontal direction, so that the control rod of the injection pump 14 not only by a pivoting movement of the toggle lever 1 but also by a movement of the centrifugal force

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controller 5 is adjusted. For the toggle lever 1 is a compliant one Stop 7 is provided, which is fixedly attached to a bearing plate 17 in the vehicle. This resilient stop 7 is shown in Fig. 2 in longitudinal section. Furthermore, there is an idle stop 6 in the area of the toggle lever 1 arranged, which limits the pivot angle of the toggle lever with respect to the stop 7 in the other direction.

According to Fig. 2, the stop 7 is a telescopic strut with a in the bearing plate 17 firmly screwed housing tube 10 and in this housing tube 10 arranged axially displaceable Stop plunger 9 formed. The stop plunger 9 is supported by a compression spring 19 in the axial direction against the housing tube 10. The spring travel K of the stop plunger 3 can be adjusted by means of an adjusting nut 11. The housing tube 10 is secured by a nut 20 in the bearing plate and after loosening this nut 20 can be adjusted by screwing in the axial direction will. By the resilient stop 7 are two

ν determined end positions of the toggle lever 1 and thus two end positions

gene of the control rod 4 of the injection pump 14. The first end position, which is shown in Fig. 1 as a dash-dotted line "n" is reached when the toggle lever due to a normal adjustment force on the stop plunger 9 comes to rest. This position corresponds to an adjustment of the control rod 4 of the injection pump 14 so that an engine speed of about 75 to 85% is reached.

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Starting from this position "η" of the toggle lever 1 via the Link rod 8 a greatly increased pivoting force in the lever 1 initiated, the stop plunger 9 is pressed against the force of the spring 19 into the housing tube 10 until the free Spring travel K has been overcome and the plunger 9 comes to a stop at the end of the housing tube. The toggle lever 1 then has the position "m achieved that of the usual full throttle position of a motor vehicle is equivalent to.

In the diagram according to FIG. 3, the adjustment path of the toggle lever 1 is plotted on the abscissa, while on the ordinate at the same time the adjustment force P introduced into the toggle lever 1 through the link rod 8 and the speed N of the combustion engine are applied.

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Claims (3)

1. Device for economical operation of a motor vehicle, in particular a commercial vehicle with an internal combustion engine, characterized in that for limiting the pedal travel of the accelerator pedal as a function of the pedal force applied in the adjustment path of the accelerator pedal linkage (1) a limited resilient stop (7) is arranged stationary in the vehicle. 2. Apparatus according to claim 1, characterized in that .the stop (7) is designed in the manner of a telescopic spring strut is., with means (11) for changing the Length of spring travel (K) is provided. 1 .1623 • t I · flit ■ * ■ r · tt · β « 3. Apparatus according to claim 1 or claim 2, characterized in that that the stop (7) is adjustable in the vehicle. 1.1623
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