System and apparatus providing a two step starting cycle for die

Details System and apparatus providing a two step starting cycle for die System and apparatus providing a two step starting cycle for die

1983-05-09

1985-01-22

Lall, Parshotam S.

Internal-combustion engines

Starting device

For airplane

123179R, 60627, F02N 1700

Patent

active

044944993

ABSTRACT:
A system for obviating chance damage in starting a diesel engine due, for example, to hydraulic lock utilizes a two step starting cycle and includes means for applying power to initiate and maintain a drive of the engine for starting thereof and associated controls rendered operative on a drive of the engine to sense the speed of crankshaft rotation and interrupt said application of power in response to a pre-set speed thereof which is substantially less than that required to start the engine to induce thereby a reduction of said speed and in response to such reduction a reapplication of said power. A portion of said controls is conditioned to automatically respond to a predetermined extent of rotation of the engine crankshaft to nullify ability of the controls to thereafter functionally interfere with the engine drive, whereupon there is an increase in the speed of crankshaft rotation to a level sufficient to induce a starting of the engine and its normal operation. This system is enhanced in its application to a preferred embodiment of the invention featuring a pneumatic starter. In this embodiment delivery of fluid under pressure, the source of power to energize the starter and crank the engine until it starts, is controlled to insure the speed of crankshaft rotation during the initial phase of starting is maintained below the aforementioned pre-set level until the crankshaft has revolved at least 360.degree..

REFERENCES:
patent: 2953127 (1960-09-01), Adams et al.
patent: 3104659 (1963-09-01), Smith
patent: 3307349 (1967-03-01), Brelen
patent: 3722209 (1973-03-01), Kaytor
patent: 3823701 (1974-07-01), Tuji
patent: 4305002 (1981-12-01), Mortensen

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