KEEWAY ARN125, Service And Maintenance Manual

Page: 7 / 85

7
ARM OF FORCE.
THE UNIT OF TORQUE IS KILOGRAM POWER-METER.
F. IGNITION TIMING
IN ORDER TO CONTROL THE BURNING OF
FIRE CHAMBER,, IGNITION IS TIMING.
THE IGNITION TIMING OF ENGINE QJ162FMJ
CHANGES AS FOLLOW:
WHEN ‘F’ IS 1400RMP, TOP DEAD CENTER
ADVANCES 15
°..
WHEN “II” IS 4000RMP, THE TOP DEAD CENTER
ADVANCES 35°.
ENGINE CYCLE
ANY FOUR-STROKE GASOLINE ENGINE
HAS
FOUR STROKES, WHICH CONSIST OF ONE
WHOLE
OF CYCLE.
1.INLET: AIR AND MIXTURED AIR OF OIL
ARE ABSORBED INTO INLET CYLINDER.
2.COMPRESSION:
MIXTURED AIR IS
COMPRESSED IN
THE CYLINDER.
3.POWER: WHEN IGNITING ENGINE, GAS
BURNS
AND EXPANDS, AND PUSH THE PISTON
MOVING
DOWN, CONNECTING ROD DIRVES ALONG
CRANKSHAFT AND OUTPUT MECHANICAL
ENERGY.
4.EXHAUST:
THE EXHAUST GAS IS
EXPELLED FROM
CYLINDER.