August 4th, and Weekend

How a Basic four stroke engine works.

- On the first stroke the piston is at TDC ( Top dead center ) and moves to BDC ( Bottom dead center ), As it does this it is drawing in fuel and air though the intake valve while the exhaust valve is closed.

Four stoke engine

- Second stroke the piston is at BDC and will move back up to TDC, When it goes from BDC to TDC it will be compressing the fuel / air mixture, to do so both the intake and exhaust valves are closed.

- Third stroke also know as the power stoke, the fuel / air mixture is ignited with a spark from the spark plug sending the piston from TDC to BDC.

- Fourth stroke the piston will move from BDC to TDC while the exhaust valve is open, pushing the exhaust fumes from the power stroke out.

Also during the day we got given a work sheet to describe what materials were used in a common car, from the panels to the chassis. Which will be attached later.

During the week I was job shadowing in a shop, They had me doing basic services on cars, showing me how to replace brake flexi hoses, and how to services rear drum brakes.