Engine starter apparatus

Details Engine starter apparatus Engine starter apparatus

1991-03-29

1992-05-12

Herrmann, Allan D.

Machine element or mechanism

Engine starters

Automatic

74393, 74437, F02N 1500, F16H 5517

Patent

active

051117070

ABSTRACT:
An engine starter apparatus comprising first and second noncircular gears, a pinion, and a starter motor. The pair of noncircular gears is interposed between a crankshaft and a ring gear of an engine, and when the speed of rotation of the first noncircular gear is kept constant, the second noncircular gear rotates the crankshaft while cyclically causing a change in the angular velocity due to its profile. Since the second noncircular gear is positioned so that the change in the angular velocity caused by its rotation can cancel a change in torque of the crankshaft, the change in the torque of the engine are not transmitted to the starter motor, thereby operating the starter motor at constant current at all times, providing such additional advantages as smaller and lighter starter motor design and reduced noise.

REFERENCES:
patent: 2477441 (1949-07-01), Cole
patent: 3420116 (1969-01-01), Seybold
patent: 3823617 (1974-07-01), Infanger et al.
patent: 4685348 (1987-08-01), Takami
patent: 4756203 (1988-07-01), Matsuda
patent: 4901690 (1990-02-01), Cummins et al.
patent: 4912993 (1990-04-01), Konishi et al.
Bloomfield, B. "When you need Noncircular Gears", Product Engineering, Mar. 14, 1960, pp. 59-64.

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