Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Indication or control of braking – acceleration – or deceleration
Patent
1998-12-21
2000-09-05
Cuchlinski, Jr., William A.
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Indication or control of braking, acceleration, or deceleration
701 29, 701 70, 701 78, 701 97, G06F 1520
Patent
active
061156620
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a brake diagnosis apparatus for a self-propelled vehicle having a hydraulic brake and a friction plate type hydraulic brake, wherein a movable friction plate attaches to and detaches from a fixed friction plate responsive to an oil pressure so as to obtain a brake force.
BACKGROUND OF THE INVENTION
As a conventional brake diagnosis apparatus for a self-propelled vehicle, there is a structure, for example, as described in Japanese Unexamined Patent Publication No. 61115739, for detecting the temperature which is generated by a brake shoe in a vehicle, for generating an alarm at a high temperature, and for controlling a traveling speed. That is, an operator receives the alarm and controls the vehicle speed, whereby a poor brake operation can be avoided.
In this case, since a traveling road, for example, in a mine for mining, quarrying, and the like, is not paved, and the vehicle for loading and carrying material frequently goes down a slope in a continuous manner, a brake is severely used. In this state, when using the apparatus, the alarm and the speed limitation are frequently performed, so that it is hard to increase the productivity of mining and quarrying although safety can be secured. Further, since the data are detected in a pin point manner at each current time, it is hard to obtain the brake performance of a vehicle as a history.
Accordingly, any application of the detected data by the apparatus is limited to a narrow range.
SUMMARY OF THE INVENTION
The present invention is made by taking the conventional problems into consideration, and an object of the present invention is to provide a brake diagnosis apparatus for a self-propelled vehicle which can detect brake data, including a history, and which can be widely applicable as well as improving the safety of the brake and the productivity of mining and quarrying.
In accordance with a first aspect of the present invention, there is provided a brake diagnosis apparatus for a self-propelled vehicle having a hydraulic brake comprising:
oil temperature detecting means for detecting a cooling oil temperature d immediately after the oil is used for cooling the brake;
holding time calculating means, for receiving the cooling oil temperature d from the oil temperature detecting means and for calculating a holding time t of the cooling oil temperature d; and
a first adding means, having stored therein a first matrix A which is sectioned in vertical and horizontal directions at every predetermined cooling oil temperature area and at every predetermined holding time area, for receiving the cooling oil temperature d from any one of the oil temperature detecting means, for receiving the holding time t from the holding time calculating means, for adding a frequency of occurrence value An to the section of the first matrix A which includes the detected cooling oil temperature d and the calculated holding time t at the respective detecting time, and for freely outputting the added frequency of occurrence value to an outer portion.
In accordance with the structure mentioned above, since the detection of the brake data is not performed in a pin point manner, in the form of detection at each current point in time in accordance with the conventional art, but is based on the frequency of occurrence An, that is, the use history of the brake, the applicable range of the brake data is widened. That is, a concentration in an abnormal section and an abnormal tendency can be visually recognized in accordance with the magnitude of the frequency of occurrence An of each of the sections in the first matrix A. Whether or not the heat balance of the total vehicle is good can be judged; and various kinds of countermeasures can be taken, e.g., a clogging of the radiator can be eliminated, a shroud can be provided in the radiator, a capacity of an oil cooler and the radiator can be increased, a cooling oil amount can be increased, an incline of a downward slope can be changed, a transmission level of a transmis
REFERENCES:
patent: 4485444 (1984-11-01), Maruyama et al.
Hasegawa Nobuki
Sugano Yukio
Watanabe Genichiro
Cuchlinski Jr. William A.
Donnelly Arthur
Komatsu Ltd.
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