Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Patent
1982-12-13
1983-10-25
Goldberg, Elliot A.
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
123179B, 307 71, B62D 4500, H02G 300
Patent
active
044121377
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 contactor if either the series contactor or the pilot relay contacts (SC1, SC2, SPR1, SPR2) have failed to open. A low system voltage detector connects the series battery pack's voltage to the control system.
REFERENCES:
patent: 2729750 (1956-01-01), Draper et al.
patent: 2835826 (1958-05-01), Vadas
patent: 2895057 (1959-07-01), Coughlin
patent: 2926266 (1960-02-01), Porter
patent: 2930901 (1960-03-01), Freeman
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patent: 3778632 (1973-12-01), Sarbacher
patent: 3871383 (1975-03-01), Lee
patent: 4009431 (1977-02-01), Johnson
patent: 4209816 (1980-06-01), Hansen
patent: 4339704 (1982-07-01), McSparran et al.
Hansen James E.
Smith Richard G.
Autio W. A.
Eaton Corporation
Goldberg Elliot A.
Grace C. H.
Jennings D.
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