Week 03 Flashcards
What is the name of the component that synchronizes the camshaft and the crankshaft so that the right valves open during the right stroke?
Timing chain or timing belt
During the compression stroke:
Both valves, the intake and exhaust, are closed.
Why is the compression stroke important to proper engine operation?
It heats up the air/fuel mixture so that it is prepared to burn efficiently AND it makes the air/fuel mixture more compact and dense, so that when it ignites, pressures will be higher.
What is the best way for a car owner to find out what types of fluids to use and how often the engine’s oil, coolant, and timing components should be changed?
Check the owners manual!
What determines the size of an engine?
The volume of the cylinders.
A certain engine was found to have bent valves and a broken piston. This was most likely caused by:
A broken timing belt
What engine component pushes the valves open?
The camshaft.
Which of the follow statements is true about the intake stroke?
1) the piston travels down in the cylinder
2) the intake valve is closed
3) the exhaust valve is open
4) this is the stroke that generates all of the engines power
1) the piston travels down in the cylinder
Which of the following statements is false?
1) if your engine has a timing belt, it should be changed at regular, specified intervals
2) engines usually have either a timing belt or a timing chain, but not both
3) if your engine has a timing change, it does not need to be changed at regular, specified intervals
4) because changing a timing belt or a timing chain is easy, anyone with a set of tools could do it
4) because changing a timing belt or a timing chain is easy, anyone with a set of tools could do it
A camshaft must turn exactly —-as the crankshaft
Half as fast
What is the correct order of a four stroke infernal combustion engine?
Intake, compression, power, exhaust
True or false: it usually makes more sense economically to wait until the timing belt breaks to replace it rather than have it changed earlier
False
What is the name of the engine component that converts the reciprocal motion of the pistons into the rotary motion needed to turn the wheels?
Crankshaft
