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Engine starter circuit for automotive vehicle with automatic transmission

  • US 4,485,694 A
  • Filed: 10/30/1981
  • Issued: 12/04/1984
  • Est. Priority Date: 01/16/1981
  • Status: Expired due to Fees
First Claim
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1. An engine starter circuit for an automotive vehicle with an automatic transmission including a shift lever, which comprises:

  • (a) a starter switch;

    (b) an inhibitor switch including in parallel;

    (1) a park-position detection switch adapted to be closed when the automatic transmission is shifted into the part position;

    (2) a neutral-position detection switch adapted to be closed when the automatic transmission is shifted into the neutral position, said inhibitor switch being connected in series with said starter switch;

    (c) a redundant park-position detection switch for detecting directly the park position of the shift lever, said redundant park-position detection switch being actuated by the shift lever and being closed when the shift lever is shifted into the park position, said redundant park-position detection switch being connected in series with said starter switch and said park-position detection switch in said inhibitor switch; and

    (d) a starter motor for starting the engine, said starter motor being energized only in two cases which are when all of said starter switch, said park-position detection switch, and said redundant park position detection switch are closed and when both said starter switch and said neutral-position detection switch are closed.

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