ENGINES - 4 STROKE

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HIGH PRESSURE

AS THE AIR/FUEL MIXTURE IS COMPRESSED DURING THE COMPRESSION STROKE, _____ _____ RAISES ITS TEMPERATURE TO ITS FLASHPOINT.

BOTTOM DEAD CENTER

THE PISTON MOVES TOWARDS _____ _____ _____ DURING THE INTAKE STROKE.

LOW PRESSURE

DRAWS THE AIR/FUEL MIXTURE INTO THE CYLINDER DURING THE INTAKE STROKE.

INTAKE STROKE

DURING THE _____ _____ LOW PRESSURE DRAWS THE AIR/FUEL MIXTURE INTO THE CYLINDER AS THE PISTON MOVES TOWARD BOTTOM DEAD CENTER. INTAKE VALVE IS OPEN.

COMPRESSION STROKE

DURING THE _____ _____ THE AIR/FUEL MIXTURE IS SQUEEZED AND HEATS UP TO ITS FLASH POINT AS THE PISTON MOVES TOWARD TOP DEAD CENTER. BOTH VALVES ARE CLOSED.

DECREASE

IF ONE OF THE VALVES IS PARTIALLY OPEN DURING THE COMPRESSION STROKE, ENGINE POWER WILL _____.

SPARK PLUG

IGNITES THE AIR/FUEL MIXTURE DURING THE POWER STROKE.

EXHAUST STROKE

IN THE _____ _____ THE PISTON'S MOMENTUM DRIVES IT BACK UP TO TOP DEAD CENTER, PUSHING THE BURNT GASSES OUT THROUGH THE EXHAUST PORT. THE INTAKE VALVE IS CLOSED AND THE EXHAUST VALVE IS OPEN.

POWER STROKE

IN THE _____ _____THE SPARK PLUG IGNITES THE AIR/FUEL MIXTURE AND THE EXPLOSION DRIVES THE PISTON TOWARDS BOTTOM DEAD CENTER. BOTH VALVES ARE CLOSED.

INTAKE > COMPRESSION > POWER > EXHAUST

LIST THE 4 STROKES IN ORDER. Answer Format: _____ > _____ > _____ > _____

BOTTOM DEAD CENTER

THE BOTTOM OF THE A PISTON'S STROKE.

OPEN

THE EXHAUST VALVE IS _____ DURING THE EXHAUST STROKE.

OPEN

THE INTAKE VALVE IS _____ DURING THE INTAKE STROKE.

TOP DEAD CENTER

THE PISTON MOVES TOWARDS _____ _____ _____ DURING THE COMPRESSION STROKE.

TOP DEAD CENTER

THE PISTON MOVES TOWARDS _____ _____ _____ DURING THE EXHAUST STROKE.

BOTTOM DEAD CENTER

THE PISTON MOVES TOWARDS _____ _____ _____ DURING THE POWER STROKE.

TOP DEAD CENTER

THE TOP OF THE PISTON'S STROKE.

PISTON

THE _____ MOVING TOWARDS TOP DEAD CENTER PUSHES THE BURNT GASSES OUT OF THE CYLINDER DURING THE EXHAUST STROKE.

STROKE

THE _____ OF A PISTON IS ITS MOVEMENT IN THE CYLINDER FROM ONE END OF ITS TRAVEL TO ANOTHER

COMPRESSION

THIS DIAGRAM REPRESENTS THE _____ STROKE.

EXHAUST

THIS DIAGRAM REPRESENTS THE _____ STROKE.

INTAKE

THIS DIAGRAM REPRESENTS THE _____ STROKE.

POWER

THIS DIAGRAM REPRESENTS THE _____ STROKE.

CLOSED

BOTH VALVES ARE _____ DURING THE COMPRESSION STROKE.

CLOSED

BOTH VALVES ARE _____ DURING THE POWER STROKE.


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