Accelerometric sensor for measuring the piston knock of an internal combustion engine
US5744698A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 1, 1996 |
| Grant date | Apr 28, 1998 |
| Priority date | — |
| Expiry date | Aug 1, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01L23/222
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An accelerometric sensor for measuring pinking in an internal combustion engine. The sensor includes a base in the form of a sleeve with a flange extending therefrom and supporting at least one stacked piezoelectric ring, connecting disks and a seismic weight. The underside of the base is used as a contact surface between the sensor and the part to be measured. The underside has a central recess such that the average load distribution diameter over the contract surface is no smaller than the average of the shoulder. This shape may be achieved with a recess which is coaxial with the sleeve and which has a diameter greater than the external diameter thereof. The shape may alternatively be achieved by forming the underside in a concave shape.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.