Abstract: This locking device is adapted for a snap-in system in which a male portion of a first element coacts with a female portion of a second element, resilient members acting on the male and/or female portion of the snap-in system.
Abstract: A pressure sensing device for measuring the pressure of a fluid, comprising: a measurement diaphragm which is at least partially made of semiconductor material, is provided with a first surface and a second surface which are exposed respectively to a first pressure and to a second pressure, and undergoes a deformation following the application of the first pressure and of the second pressure; and a resonant element made of semiconductor material which is provided with a first end portion and with a second end portion for mechanically coupling the resonant element to the measurement diaphragm, the oscillation frequency of the resonant element varying according to the deformation to which the measurement diaphragm is subjected; and first circuit means for generating a sensing signal which is indicative of the oscillation frequency of the resonant element.
Abstract: A dual placard algorithm implemented in a tire pressure monitoring system which responds to tire inflation changes caused by the driver, and is thereby able to allow the tire pressure monitoring system to detect low tire pressure in dual placard applications. The algorithm automatically sets the threshold appropriate for a high placard pressure recommendation in the event the driver has inflated the rear tires to the high placard pressure recommendation. If the driver subsequently changes the rear tire pressure to the low placard pressure recommendation, the dual placard algorithm alerts the driver to manually enter a learn mode, whereupon the algorithm automatically re-sets the threshold to that appropriate for the low placard pressure recommendation only if the driver has deflated both rear tires to the low placard tire pressure recommendation.
Type:
Grant
Filed:
August 21, 2003
Date of Patent:
November 2, 2004
Assignee:
General Motors Corporation
Inventors:
Michael Allan Davis, Thomas H. Tu, Ryan M. Frakes, Stephen C. Kirsch
Abstract: A device for measuring uniformity of a vehicle tire, in which a roller (5) drives a vehicle tire (1) mounted in a machine frame (4) via a piezo measuring hub (3). The roller is mounted via radial bearings (9) on a sliding carriage (10) that can be displaced, and is supported in the axial direction exclusively by force-measuring cells (11).