Boots – shoes – and leggings
Patent
1989-11-27
1992-04-28
Lall, Parshotam S.
Boots, shoes, and leggings
36443111, 371 62, B60K 3100
Patent
active
051093421
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a constant-speed running apparatus for running an automobile at a car speed set by controlling opening and closing of a throttle valve by setting to a desired car speed during driving of the automobile, and specifically related to a constant-speed running apparatus for an automobile providing a control signal monitoring apparatus of an actuator for detecting an abnormal state of a controlling part of this apparatus.
BACKGROUND ART
A constant speed running apparatus for automobile performs automatic control to run an automobile at a set car speed. This constant-speed running apparatus for automobile is constituted principally with an actuator adjusting the degree of opening of a throttle valve, a controlling part and a driving part consisting of a micro computer which drives and controls this actuator and a running car speed detecting part, which adjusts the degree of opening of the throttle valve through the actuator, and adjusts fuel supplied to an engine, and controls the running car speed to become a set car speed. Such a conventional constant-speed running apparatus for an automobile usually includes an apparatus for preventing the controlling part from being put in an abnormal state of operation caused by static electricity or the like (watch dog timer. This device periodically sends a signal from the controlling part, and inputs this signal to a watch dog timer, and resets the micro-computer of the controlling part by the watch dog timer when the above-mentioned signal is not outputted for a predetermined time or more. The constant-speed running controlling state of the constant-speed running apparatus is cleared, and this thereby returns to the operation by the will of the driver.
However, there has been a problem that when only the portion transmitting a periodic signal of the controlling part is operated normally and an abnormal state takes place in the function performing a constant-speed running of the controlling part, the abnormal state cannot be detected by the above-mentioned constitution, and it is possible to fall into a state of dangerous operation.
DISCLOSURE OF THE INVENTION
A principal object of the present invention is to provide a high-safety constant-speed running apparatus for an automobile capable of reliably detecting an abnormal state of the controlling part by an economical constitution.
The above-mentioned object of the present invention can be achieved by the apparatus comprising an actuator which compares an arbitrarily set car speed with the actual car speed and adjusts the degree of opening of a throttle valve in a manner that the both speeds agree with each other, a driving output means for driving the above-mentioned actuator, an arithmetic operation means for operating the driving direction and the driving time of the above-mentioned actuator, a control signal output means for outputting a control signal of the actuator to the above-mentioned driving output means on the basis of the driving direction and the driving time of the actuator which are operated by the above-mentioned arithmetic operation means, a control signal OFF means for providing a periodic OFF signal for a minute time having no effect on driving the above-mentioned actuator in the above-mentioned control signal, and a control signal monitor means which monitors presence or absence of the above-mentioned OFF signal and judges that the above-mentioned arithmetic operation means or the above-mentioned controlling output means is abnormal when the OFF signal is not detected for a predetermined time or more to output a control abnormality signal. Furthermore, the above-mentioned object can be achieved by the apparatus comprising: an actuator for adjusting the degree of opening of a throttle valve; a driving output means for driving the above-mentioned actuator, an arithmetic operation means for operating the driving direction and the driving time of the actuator; a control signal output means for outputting a control signal to the above-mentioned drivin
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Eugen Stall, "Konzepte fur sichere Elektronik in Kraftfahrzeugen", Automobil-Industrie, Jun. 1986, pp. 779-785.
Kondo Yasuhiro
Nakano Shigeru
Lall Parshotam S.
Matsushita Electric - Industrial Co., Ltd.
Zanelli Michael
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