Method and apparatus for thermal testing of brake performance
First Claim
1. A method for analysis of brake performance in automotive vehicles comprising:
- a) providing sensing means including infra-red spot sensor means and causing same to sense the temperature of a location on a brake structure; and
b) comparing data from at least two such brake structure sensing steps to determine the degree of brake imbalance present;
charactised by c) inputting data to said sensing means or to a test control system associated therewith relating to vehicle type or wheel or brake structure characteristics;
d) providing said sensing means with a mobile testing handset and causing said handset to generate testing instructions in accordance with the method to be carried out for a given structure under test;
e) carrying out testing steps on at least two brake structures of at least one axle of said vehicle by means of said handset in accordance with said instructions displayed by said handset and thereby generating test data relating to said brake performance; and
f) said testing steps being carried out in a sequence defined and in accordance with said instructions and including a repetition of at least one step of said sequence whereby allowance made for the effect of the time taken to carry out said sequence of steps can be checked and adjusted if necessary.
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Accused Products
Abstract
Vehicle thermal testing method and apparatus is based upon the use of a mobile handset. The handset uses spot infra red thermal sensing to identify thermal imbalance between wheels on opposite sides or the same side of a vehicle. Testing identifies thermal levels resulting from braking by mere application of the handset to wheel nuts after a short brake application and without use of roller test beds or other such equipment. Tires can be similarly tested. The handset can generate test instructions. Repetition of an initial test enables the offset for cooling during the test to be verified. A similar technique applies to tires. The handset may communicate with a base station providing for keyboard input of vehicle data and results printout.
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Citations
18 Claims
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1. A method for analysis of brake performance in automotive vehicles comprising:
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a) providing sensing means including infra-red spot sensor means and causing same to sense the temperature of a location on a brake structure; and
b) comparing data from at least two such brake structure sensing steps to determine the degree of brake imbalance present;
charactised byc) inputting data to said sensing means or to a test control system associated therewith relating to vehicle type or wheel or brake structure characteristics;
d) providing said sensing means with a mobile testing handset and causing said handset to generate testing instructions in accordance with the method to be carried out for a given structure under test;
e) carrying out testing steps on at least two brake structures of at least one axle of said vehicle by means of said handset in accordance with said instructions displayed by said handset and thereby generating test data relating to said brake performance; and
f) said testing steps being carried out in a sequence defined and in accordance with said instructions and including a repetition of at least one step of said sequence whereby allowance made for the effect of the time taken to carry out said sequence of steps can be checked and adjusted if necessary. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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2. Apparatus for analysis of brake performance in automotive vehicles, comprising:
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a) sensing means including infra-red spot sensor means adapted to sense the temperature of a location on a brake structure connected thereto;
b) comparator means adapted to compare data from at least two such brake structure sensing steps to determine the degree of braking imbalance;
characterised byc) data input means adapted to permit the inputting of data to said sensing means or to a test control system associated therewith relating to vehicle type or wheel or brake structure characteristics;
d) said sensing means comprising a mobile testing handset adapted to generate testing instructions in accordance with the method to be carried out for a given vehicle type or wheel or brake structure characteristics under test;
e) said handset being adapted to generate said testing instructions for said sensing steps and defining a sequence of steps and including a repetition of at least one step of said sequence whereby allowance made for the effect of time taken to carry out said sequence of steps can be checked and adjusted if necessary.
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3. A method of analysis of thermal distribution in a vehicle system comprising heat generating means, the method comprising:
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a) causing a vehicle to execute an amount of thermal distribution in relation to at least a pair of assemblies or components or systems to be tested to provide an opportunity to generate at least a minimum quantum of heat for test purposes;
b) providing thermal sensor means and causing same to sense the temperature of a first such assembly or component or system;
c) taking said sensor means to a second such assembly or component or system which normally constitutes with said first such assembly or component or system a thermally related pair, and causing said thermal sensor means to sense the temperature of said second assembly or component or system;
d) providing thermal comparator means adapted to compare the temperatures of said assemblies or components or systems and adapted to indicate the state of thermal balance or imbalance or thermal relationship thereof and causing same to effect such comparison and indication in relation to said first and second assemblies or components or systems;
characterised bye) providing said sensor means as part of a mobile handset adapted to be hand-held by a user at a location close to or adjacent each such assembly or component or system to be tested;
f) providing said handset with its own locator means operative in relation to said thermal sensor means to enable the user rapidly to position same in relation to said assemblies or components to be tested so as to provide a valid comparison basis between said temperature sensing steps.
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11. Apparatus for effecting analysis of thermal distribution in a vehicle system comprising heat generating means, the apparatus comprising:
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a) thermal sensor means adapted to sense the temperature of a first assembly or component or system to be tested after a vehicle incorporating same has executed an amount of thermal distribution so as to provide an opportunity for generation of at least a minimum quantum of heat for test purposes;
b) said sensor means being likewise adapted to sense in relation to a second such assembly or component or system which normally constitutes with said first such assembly or component or system a thermally balanced or related pair, whereby said thermal sensor means can sense the temperature of said second such assembly or component;
c) thermal comparator means adapted to compare the temperatures of said assemblies or components and adapted also to indicate the state of thermal balance or imbalance or relationship;
characterised byd) said sensor means being provided as part of a mobile handset adapted to be handheld by a user at a location close to or adjacent each such assembly or component or system to be tested;
e) said handset comprising its own locator means operative in relation to said thermal sensor means to enable the user rapidly to position same in relation to said assemblies or components or systems to be tested so as to provide a valid comparison basis between said temperature sensing steps. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification