Method and system for dynamic testing of a vehicle exhaust system in a rigid frame test fixture
US6304829A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1999 |
| Grant date | Oct 16, 2001 |
| Priority date | — |
| Expiry date | Feb 22, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M7/022
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and system are provided for generating engine attachment control boundary conditions and corresponding control signals for an exhaust system laboratory test fixture which accurately reproduce both the dynamic behavior of a vehicle powertrain during operation, and the dynamic behavior of the vehicle frame during operation in the area where the exhaust system is attached to the vehicle frame. Road load data is collected in vertical, lateral, and longitudinal directions on the vehicle frame during vehicle operation at each of the locations where the exhaust system attaches. In addition, temperature and thermal cycling data are also collected during operation of the vehicle. The road load data is used to determine a best fit rigid body model. Accelerometer locations and directions are determined from statistical analysis and ranking to find the measures best fitting the determined rigid body. This information is then used to generate the test boundary conditions and control signals to be input to the test fixture. Thermal profiles are generated based on the collected temperature data to form input control signals to control heating of the exhaust system during testing. The gen…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.