Dual voltage engine starter management system
US4412137A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1982 |
| Grant date | Oct 25, 1983 |
| Priority date | — |
| Expiry date | Dec 13, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02N2011/0877
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A dual voltage engine starter system having a first battery pack (B) for supplying power to the system and a second battery pack (A) and contactors (SC,PC) for connecting the battery packs in series mode for cold weather starting or in parallel mode for warm weather starting, a pilot relay (SPR) for controlling the standard start solenoid (SOL), and a starter contactor (SMC) that controls the starter motor (SM) circuit to protect the solenoid contacts (SOL1). A control logic system (FIGS. 2a-b) has a single timer (TMR) and a sequencing timer circuit (STC) for controlling the contactors and relay in particular sequences, both for high and low voltage start cycles and for starting and terminating start cycles. A low voltage detector (LVD) controls a start-terminate latch (STL) to abort the start cycle if the start motor (SM) voltage is too low. A frequency sensor (FS) sets the latch (STL) to end the starting cycle when the engine reaches running speed. A transfer detector (TD) sets the latch (STL) to abort the starting cycle if mode transfer is attempted during the starting cycle. Weld detectors (WDC) function at the end of the start cycle to prevent reclosing of the parallel contact…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.