Engine controlling system for vehicle

Details Engine controlling system for vehicle Engine controlling system for vehicle

1989-08-22

1992-07-07

Chin, Gary

Boots, shoes, and leggings

180179, 123352, 36443107, B60K 3100

Patent

active

051288699

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

This invention relates to an engine controlling system for a vehicle which is suitable for use with an automobile.


BACKGROUND OF THE INVENTION

Conventionally, various systems for controlling an engine of a vehicle to automatically control the running speed of the vehicle have been provided. Such control may be constant speed running control, accelerated or decelerated running control or the like. Those systems are provided principally in order to facilitate operation for running of a vehicle. For example, it is anticipated to attain desired running of a vehicle with minimized operations of an accelerator pedal or a brake pedal.
Particularly when a vehicle is running following another preceding vehicle on a road where traffic is heavy, the running speed must be changed particularly frequently, and it is very important to allow the running speed of the vehicle to be changed frequently with a minimized number of operations.
However, when the running speed of a vehicle in a constant speed running condition is to be changed, it is necessary, with a conventional engine controlling system for a vehicle, to treadle an accelerator pedal or loosen the treadling of the accelerator pedal until a predetermined car speed is reached and then re-set the constant running speed. Also, it frequently happens that it is desired to cause a vehicle to run at a constant speed after the vehicle has been decelerated to a predetermined speed by treadling operation of a brake pedal. In such an instance, normally a conventional engine controlling system for a vehicle is reset each time the brake pedal is treadled, and consequently, it is necessary to re-start constant speed running control by manual operation. Thus, the conventional engine controlling systems for an engine have drawbacks that such operation as described just above makes a burden to the driver and that the essential object of a controlling means of the type to facilitate operation cannot be attained sufficiently.
The present invention has been made in view of such a subject as described above, and it is an object of the present invention to provide an engine controlling system for a vehicle which can attain easy and smooth transition to constant speed running of the vehicle even after operation of a brake pedal or an accelerator pedal and with which a will of a driver for driving can reflect with certainty on running of the vehicle.


DISCLOSURE OF THE INVENTION

In order to attain the object, according to the present invention, there is provided an engine controlling system for a vehicle, which comprises an engine output adjusting means for adjusting an output power of an engine carried on the vehicle, an acceleration/deceleration instructing means for developing an instruction of acceleration or deceleration of the vehicle, an accelerated/decelerated condition detecting means for detecting an inoperative condition of the acceleration/deceleration instructing means to develop a non-operation detection signal, a constant speed running designating means for developing a constant speed running designating signal when the non-operation detection signal is received, an aimed speed setting means for setting, when the constant speed running designating signal is received, an aimed speed at which the vehicle should make constant speed running, a running speed detecting means for detecting a running speed of the vehicle to develop a running speed detection signal, and a constant speed running controlling means for controlling, when the constant speed running designating signal is received, the engine output adjusting means in accordance with the running speed detection signal so that the running speed of the vehicle may become equal to the aimed speed.
With the engine controlling system for a vehicle according to the present invention described above, if the accelerated/decelerated condition detecting means detects that the acceleration/deceleration instructing means is inoperative and develops a non-operation detection signal, then a constant speed

REFERENCES:
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patent: 4117903 (1978-10-01), Fleischer et al.
patent: 4750598 (1988-06-01), Danno et al.
patent: 4833612 (1989-05-01), Okuno et al.
patent: 4884203 (1989-11-01), Preis et al.
patent: 4907155 (1990-03-01), Naitou et al.
patent: 4914596 (1990-04-01), Etoh et al.
patent: 4934476 (1990-06-01), Hyodo

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