Pulse width modulation of brake shift interlock solenoid
US6976569B2 · kind B2 · utility
10Cited by
19References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2003 |
| Grant date | Dec 20, 2005 |
| Priority date | — |
| Expiry date | Nov 4, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2007/1888
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An apparatus and method is provided for an improved brake shift interlock system which reduces solenoid noise created by vehicle vibrations and solenoid activation. The brake shift interlock system includes a park position switch, a brake sensor, and a control circuit. The method includes the sensing of the park position switch and the brake sensor and generating a pulse width modulated control signal having a varying duty cycle for driving the solenoid when predetermined conditions of the park position switch and brake sensor are sensed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.