Podcast
Questions and Answers
In a four-stroke internal combustion engine, which of the following sequences accurately describes the order of events?
In a four-stroke internal combustion engine, which of the following sequences accurately describes the order of events?
- Intake, Compression, Power, Exhaust (correct)
- Compression, Intake, Exhaust, Power
- Intake, Power, Compression, Exhaust
- Power, Exhaust, Intake, Compression
Diesel engines differ from petrol engines primarily because they:
Diesel engines differ from petrol engines primarily because they:
- Employ a less powerful compression stroke.
- Use a spark plug to ignite the air-fuel mixture.
- Have lower energy consumption.
- Rely on compression ignition rather than a spark plug. (correct)
Which engine subsystem is responsible for initiating the turning of the motor in a car?
Which engine subsystem is responsible for initiating the turning of the motor in a car?
- Ignition system
- Fuel system
- Starting system (correct)
- Electrical system
The cooling system in both electric and internal combustion engines primarily functions to:
The cooling system in both electric and internal combustion engines primarily functions to:
What is the most common type of hybrid car, according to the text?
What is the most common type of hybrid car, according to the text?
How do range-extended hybrid vehicles primarily operate?
How do range-extended hybrid vehicles primarily operate?
Which of the following best describes the process of abrasive jet machining?
Which of the following best describes the process of abrasive jet machining?
What is a key advantage of abrasive jet machining?
What is a key advantage of abrasive jet machining?
Ultrasonic machining is particularly well-suited for:
Ultrasonic machining is particularly well-suited for:
What is a primary characteristic of water jet machining?
What is a primary characteristic of water jet machining?
Flashcards
Internal Combustion Engine (ICE)
Internal Combustion Engine (ICE)
ICE provides mechanical power inside a car, classified as two or four stroke, spark ignition, or compression ignition.
Four Stroke Cycle Steps
Four Stroke Cycle Steps
- Intake, 2) Compression, 3) Power, 4) Exhaust
Diesel Engine
Diesel Engine
Uses compression ignition, not a spark plug, to ignite fuel.
Ignition System
Ignition System
Turns the motor
Signup and view all the flashcards
Starting System
Starting System
Allows the car to start
Signup and view all the flashcards
Electrical System
Electrical System
Gives electricity to the electronic components of the car with use of a battery.
Signup and view all the flashcards
Cooling System
Cooling System
Maintains engine temperature using a liquid coolant.
Signup and view all the flashcards
Fuel System
Fuel System
Bring the petrol to the engine.
Signup and view all the flashcards
Exhaust System
Exhaust System
Take the burned gas out of the car.
Signup and view all the flashcards
Erosion
Erosion
Remove unwanted material
Signup and view all the flashcardsStudy Notes
- Internal combustion engines (ICE) provide mechanical power inside a car
Engine Classification
- Classified as two stroke or four stroke, utilizing either spark ignition or compression ignition
Four Stroke Cycle
- Intake: Cylinder descends, allowing gas mixture to enter
- Compression: Piston compresses gas, increasing temperature
- Power: Electric spark (spark ignition) ignites gas, creating explosion
- Exhaust: Piston descends after explosion, expelling burned gas
Diesel Engines
- Diesel are heavier and more powerful than petrol engines
- Diesel engines do not use spark plugs
- Diesel engines use more powerful compression to generate extreme heat (compression ignition)
- Commonly used in ships and locomotives
Engine Subsystems
- Ignition system: Initiates spark to turn motor
- Starting system: Enables the car to start
- Electrical system: Supplies electricity to car's electronic components using a battery
- Cooling system: Regulates engine temperature using a liquid
- Fuel system: Delivers petrol to engine
- Exhaust system: Removes burned gas
Electric Engines
- Electric engines function using rechargeable batteries
- Requires cable for charging, which takes a minimum of 8 hours to fully charge at home or outside
- Includes a cooling system
Hybrids
- Hybrids vehicles use two or more energy resources such as solar, wind, petrol and electricity
- They use a combustion engine to generate energy for the electric engine
- Parallel Hybrid (most common): Powered by petrol engine and electric motor together, can directly power wheels
- Range Extended Hybrid: Doesn't power directly but uses the petrol engine to change the battery
- Plug in hybrids can be charged like electric cars and while moving
Mechanical Processes
- Erosion process is used to remove unwanted material
Abrasive Jet Machining
- Abrasive jet machining uses a jet of gas or air with abrasive particles to remove material from workpiece
- Removal of material caused by air/gas exiting nozzle at high pressure impacting workpiece
- Does not generate heat and can cut all material types
- Uses much energy, is expensive and cutting is slow
Ultrasonic Machining
- Ultrasonic Machining uses ultrasonic waves (20-30 kHz)
- The tool vibrates slowly down the the workpiece
- A nozzle adds abrasive to vibrate and "dig" into the workpiece
- Used for brittle and hard materials, doesn’t generate heat and is suitable for complex forms, but is limited
Water Jet Machining
- Water Jet Machining uses highly pressurized water jet to cut surface
- Water is pumped at high pressure and out of the nozzle, making the jet cut the piece
- Can cut almost any material, does not generate heat and is precise
- Consumes a lot of energy, is expensive and cutting is very slow
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
