Compressed air starter

Details Compressed air starter Compressed air starter

1979-12-11

1982-04-13

Lall, P. S.

Internal-combustion engines

Starting device

For airplane

60627, F02N 1708

Patent

active

043242120

ABSTRACT:
This invention relates to a compressed air starter including pneumatically operating starting valves for diesel engines, wherein one main starting valve is connected to the cylinder head of the engine and is provided with a valve body, which co-operates with a valve seat in order to alternately open and close an inlet opening for compressed air to one cylinder, whereby during the start up of the engine, starting air (compressed air) continuously is supplied to the main starting valve, said valve body including one servo piston, which is controlled by servo air from a supply of servo air, which servo air acts on the servo piston during moments related to the working phase of the engine.
The invention simplifies the pipe arrangement for the compressed air in a diesel engine with several cylinders where there is usually arranged a main distributor for distributing the servo or pilot air, which controls the starting valves. The invention utilizes a magnetic valve (17), which is connected to the main starting valve (8,9,10) and has a valve slide, which in one position (I-II) connects the supply (16) of servo air with a compression face of the servo valve (10), said servo valve thereby being activated to drive the valve body (8,9) to the opening position and, in a second position (II-III) controls the outlet from the supply (16) of servo air so that the servo piston drives the valve body (8,9) to a closing position, said magnetic valve (17) being controlled by electric signals from a transmitter (20) controlled by the crank shaft or by a second shaft (22) rotating in accordance with the working phase of the engine.

REFERENCES:
patent: 2595281 (1952-05-01), Miller
patent: 3032965 (1962-05-01), Wistner
patent: 3307349 (1967-03-01), Brelen
patent: 4112895 (1978-09-01), Habert

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