The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 23, 1989
Filed:
Mar. 17, 1988
Fumio Makino, Osaka, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A vehicle-mounted electronic control unit such as an anti-lock brake control unit is connected to a testing device through two serial transmission lines for testing. Upon startup of the control unit, signals are exchanged therebetween. Only if the signal exchange is completed in a predetermined period of time, the control unit enters into a special operation mode for testing. Otherwise, it is controlled in an ordinary mode. In this test mode, the data in the control unit such as a wheel speed are sent to the testing device to be inputted in its test programs. The testing device then gives to the control unit various command signals produced according to its programs. The control unit then sends test signals in response to the command signals to actuators. Thus, when the control unit is in the test mode, the testing device can control the actuators by transmitting command signals to the control unit and thus can test the performance of not only the control unit but also the actuators from various angles.