Measuring piston steady-state temperatures
US4787242A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 21, 1987 |
| Grant date | Nov 29, 1988 |
| Priority date | — |
| Expiry date | Jul 21, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01K11/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus is disclosed for calculating the steady-state temperatures experienced by an Aluminum-Silicon piston. That piston has incorporated therein an Aluminum-Copper alloy device, such as a band integrally cast within the piston, a setscrew, or an installable wedge that is press-fit into the piston. Preferably, that alloy is a 3.5% to 4.5% Aluminum-Copper alloy that meets the requirements of Aluminum Association Alloy 242 that has been tailored to provide temperature information within 3.degree. C. over the temperature range of from 175.degree. C. to 375.degree. C. The steady-state temperature experienced by a piston in an oil qualifying run is calculated by subjecting the piston to an oil qualifying run of at least one hundred hours, testing the hardness of the apparatus, and calculating the steady-state temperature by reference to a calibration curve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.