When the air-fuel mixture ignites inside an engine cylinder, expanding combustion pressure is converted into mechanical work and transmitted through internal components. What is the correct sequence in which mechanical force travels through these internal engine parts to produce rotational output?
- 1Expanding combustion gases exert downward pressure directly against the piston crown.
- 2The piston transfers this downward mechanical thrust through the wrist pin.
- 3The wrist pin transmits the linear force down through the connecting rod.
- 4The connecting rod pushes against the crankshaft journal, converting linear motion into rotational torque.
Answer
Expanding combustion gases exert downward pressure on the piston crown, which transfers force through the wrist pin, down through the connecting rod, and finally pushes the crankshaft journal to generate rotational torque.
When ignition occurs, high-pressure expanding gases push directly downward on the piston crown. This linear thrust is transferred through the wrist pin, which holds the connecting rod inside the piston. The connecting rod then transmits the force downward to the crankshaft journal, where the offset throw converts the piston's reciprocating linear motion into rotary output motion.
Step-by-Step Solution
Key Concept
Mechanical force transmission and motion conversion through internal engine components
Estimated Time:45s