Mechanical laboratory methods; the testing of instruments and machines in the mechanical engineering laboratory and in practice (1922)
Smallwood, Julian Chase · New York, D. Van Nostrand company · leaf 303
to make the clearance greater makesthe valve open later and close earlier. Thetiming may be changed also by changingthe relative positions of the gears a andb. Thus, in the figure, if gear a is turnedback (clockwise) so that it meshes with onetooth behind on 6, both opening and closingwill be… … Fig. 103.Gas Engine Valve 58 GAS ENGINE TESTING 285 to correct, if necessary, by changing the clearance or gear meshor both. The point of opening or closing may be accuratelyfixed by turning the valve stem with the fingers; the friction ofthe valve when seated is easily felt. It should be noted…
Mechanical engineering
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