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The four strokes of a four-stroke engine are intake, compression, power and exhaust. The crankshaft controls the upward and downward motion of the pistons. The camshaft controls the opening and closing of the intake and exhaust valves.
Intake stroke- the intake valve is open and the exhaust valve is closed. The piston moves downward, decreasing the pressure in the cylinder, which draws the fuel-air mixture in through the intake valve.
Compression stroke- both the intake valve and the exhaust valve are closed. The piston moves upward, compressing the fuel-air mixture. When the piston nears TDC (top dead center), the fuel-air mixture is ignited by the spark plug.
Power stroke- both the intake valve and the exhaust valve are closed. The explosion caused by the ignition of the fuel-air mixture (combustion) forces the piston downward.
Exhaust stroke- the intake valve is closed and the exhaust valve is open. The piston moves upward, forcing the gases produced by combustion out of the cylinder through the exhaust valve.
So, for each firing of a given cylinder, the intake valve opens once and the exhaust valve opens once. But, for each firing of a given cylinder, the piston must travel downward and then upward twice (in each direction.). Therefore, the crankshaft must rotate twice per given cylinder firing, while the camshaft rotates only once per given cylinder firing.
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What is a cam shaft?
cam shaft that allows the downward thrust of one Piston to cause another piston to move back up to be ready to be pushed down again. The Ignition is timed in a manner that allows the sequential firing of the spark plugs to cause The cam shaft to rotate smoothly. by Evan The cam shaft opens the valves as the piston comes up and down to let fuel in and let exhaust pass the crankshaft pushes the pistons up and down
What is the difference between a crankshaft position sensor and a camshaft position sensor in a 1995 camry?
The Crankshaft sensor and the Cam sensor monitor the position and or the speed of rotation of the crankshaft. Together they send signals to the ECM. The ECM uses that information along with info from other sensors to send spark and fuel to the cylinders at the correct time. Some engines only have only a crank sensor to perform that job. Other engines that have both crank and cam sensors that split the duties.
What are the timing marks set for on a 2001 Ford Focus?
cam shaft sensor controlled
Which of the following components help to limit the front-to-back movement of the crankshaft?
The thrust bearing in most engines.the cam bearing
What happens when the cam shaft goes bad?
Engine makes noise, performance drops, fuel mileage drops,
What is ratio of crank shaft to cam shaft?
The camshaft spins at half the engine speed. The crankshaft spins 2 times for every one revolution of the camshaft
Speed ratio between cam shaft and crank shaft?
Cam spins at half the speed of the engine.
What is a cam chain on a Nissan 350Z?
cam chains are a chain the attach to the crankshaft and the cam shaft , the crankshaft is the shaft making the pistons go up and down the cam shaft makes the valves open and close, the crank shaft and cam shaft have to be aligned a certain way or the car will not fire, this is called "timing" . if your looking for where it is , its most likely in the front of the engine get a pro to look at it.
Where do you set the auxiliary shaft timing mark on a 1991 ford ranger 2.3?
auxillary shaft? do you mean crankshaft od cam shaft
Where is cam shaft sensor located on 1993 Dodge Cummins diesel?
a 1993 doesn't have a cam sensor. the crankshaft position sensor is located on the front of the engine directly above the crankshaft pulley
Are the cam position sensor and crankshaft sensor the same thing in a 1999 sebring convertible v6?
No, the crank sensor reads crankshaft speed. The cam sensor reads camshaft speed. The cam sensor is on the distributor on a 1999 2.5L
What is Purpose of the cam shaft?
to open and close the intake and exhaust valves in accordance with piston and crankshaft position
How many times does the cam shaft turn when the crankshaft turns?
the camshaft turns once to every time the crankshaft turns twice meaning it is 2:1
How do you aling the crank shaft and the cam shafton kia sportage 1999 2.0?
cam shaft have noyth that must be at 12:00, crankshaft you will have to take harmonic balancer off and look about 1:oo to see it.
If the crankshaft in a twin cylinder four stroke engine is turning 1000rpmhow fast is cam shaft turning?
500 rpm
What is a cam sprocket?
A cam sprocket is a part which is attached to one end of a cam shaft in an engine. A cam sprocket, along with the timing belt maintain the timing between the camshaft and crankshaft, which ensures that the engine runs properly.
Where is the cam shaft position sensor on a 2004 chev optra?
The sensor is located directly above the crankshaft pulley. The camshaft sensor also connects with the crankshaft position sensor.
