Questions and Answers
What is a Four-stroke cycle?
What is a Two-stroke cycle?
An engine that requires one complete revolution of the crankshaft to fire each piston once.
What is a Reed valve?
Where the air-fuel mixture is drawn into the crankcase.
What is a Rotary Valve?
Signup and view all the answers
What is an L-head engine?
Signup and view all the answers
What is a T-head engine?
Signup and view all the answers
What is an F-head engine?
Signup and view all the answers
What is an I-head engine?
Signup and view all the answers
What is a Valve train?
Signup and view all the answers
What is a Rocker arm?
Signup and view all the answers
What is a Push rod?
Signup and view all the answers
What is a Rocker shaft?
Signup and view all the answers
What is a Ball pivot?
Signup and view all the answers
What is an Overhead camshaft?
Signup and view all the answers
What is Detonation?
Signup and view all the answers
What is Preignition?
Signup and view all the answers
Who developed the Ricardo combustion chamber for L-head engines?
Signup and view all the answers
What is a Squish area?
Signup and view all the answers
What is a Hemispherical combustion chamber?
Signup and view all the answers
What is a Wedge chamber?
Signup and view all the answers
What does Radical refer to in engine design?
Signup and view all the answers
What does Inline describe in engine components?
Signup and view all the answers
What is a Slant engine?
Signup and view all the answers
What is an Inclined engine?
Signup and view all the answers
What is a V-type engine?
Signup and view all the answers
What is a Horizontal-opposed engine?
Signup and view all the answers
What is a Firing order?
Signup and view all the answers
What are Engine mounts?
Signup and view all the answers
What is a Rotary engine?
Signup and view all the answers
What is a Rotor?
Signup and view all the answers
What is a Rotor housing?
Signup and view all the answers
What is an Eccentric Shaft?
Signup and view all the answers
What is a Miller-cycle engine?
Signup and view all the answers
What is Natural gas?
Signup and view all the answers
What characterizes a Variable compression engine?
Signup and view all the answers
Study Notes
Engine Types and Cycles
- Four-stroke cycle: Requires two complete crankshaft cycles to fire each piston once.
- Two-stroke cycle: Only needs one complete crankshaft revolution to fire each piston.
Engine Valves
- Reed valve: Allows air-fuel mixture to enter the crankcase.
- Rotary valve: Exposes ported holes for gas intake and exhaust.
Engine Designs
- L-head: Features both valves on one side of the cylinder.
- T-head: Has intake and exhaust valves located on opposite sides of the cylinder.
- F-head: One valve is in the block, the other is in the cylinder head.
- I-head: Contains both valves in the cylinder head.
Valve Mechanisms
- Valve train: Comprises various parts involved in valve operation.
- Rocker arm: Directs downward motion onto the valve stem.
- Push rod: Connects the valve lifter to the rocker arm.
- Rocker shaft: A shaft supporting rocker arms in some engine designs.
- Ball pivot: A mechanism for rocker arm pivoting.
Camshaft and Combustion Dynamics
- Overhead camshaft: Positioned above the cylinder head; driven by a timing mechanism.
- Detonation: Rapid fuel charge ignition causing a knocking noise in the combustion chamber.
- Preignition: Occurs when fuel ignites prematurely.
Combustion Chamber Design
- Ricardo: Innovated a combustion chamber design originally for L-head engines, adapted for I-head engines.
- Squish area: Gap between the piston head at top dead center (TDC) and the cylinder head.
- Hemispherical combustion chamber: Dome-shaped design enhancing engine aspiration with reduced heat loss.
- Wedge chamber: Features a wedge shape, efficient and conducive to mass production.
Engine Configuration
- Radical: A line perpendicular to a shaft or cylinder center line.
- Inline: Components arranged in a straight row.
- Slant engine: Cylinders tilted from the vertical plane in an inline arrangement.
- Inclined engine: All cylinders are aligned in a straight row.
- V-type engine: Arranges two banks of cylinders at angles of 60 or 90 degrees.
- Horizontal-opposed engine: Positioned perpendicular to the vehicle chassis.
Engine Operations
- Firing order: Sequence in which the engine cylinders fire.
- Engine mounts: Support systems made of metal, rubber, or plastic to secure the engine to the chassis; may include liquid-filled options.
Rotary Engines
- Rotary engine: Uses triangular rotors instead of pistons for the engine cycle, also known as a Wankel engine.
- Rotor: A moving part in electromagnetic systems like motors and generators.
- Rotor housing: Metal casing with slots for rotor vanes.
- Eccentric shaft: Key component in rotary engines, its configuration depends on the number of rotors.
Advanced Concepts
- Miller-cycle: Extended intake valve opening during the piston’s compression stroke, enhancing efficiency.
- Natural gas: General term for petroleum-based gases such as propane and liquefied petroleum gas.
- Variable compression engine: Adjusts its compression ratio to optimize fuel efficiency.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge on various engine types, cycles, and valve mechanisms. This quiz will cover the four-stroke and two-stroke cycles, different engine designs, and how valve trains function. Perfect for automotive enthusiasts and students!