Engine Components Overview
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Questions and Answers

What is the function of the cylinder head?

  • Close one end of the cylinder and house the valves (correct)
  • Transmit power from piston to crankshaft
  • Provide a gas-tight seal between piston and cylinder liner
  • Change reciprocating motion to rotating motion
  • Which component transmits the power developed by burning fuel to the crankshaft?

  • Connecting rod
  • Piston (correct)
  • Piston rings
  • Cylinder
  • What is the purpose of the connecting rod?

  • Change reciprocating motion to rotating motion (correct)
  • Create a gas-tight seal between piston and cylinder liner
  • Close one end of the cylinder
  • Admit air and fuel into the cylinder
  • What is the role of the crankshaft in an engine system?

    <p>Rotate in the main bearing under action of piston</p> Signup and view all the answers

    What is the function of the piston rings in an engine?

    <p>Lubricate with engine oil to create a seal</p> Signup and view all the answers

    Which part of the engine is responsible for admitting air and fuel and discharging exhaust gases?

    <p>Cylinder head</p> Signup and view all the answers

    What is the purpose of the main bearings in an engine?

    <p>Support the crankshaft</p> Signup and view all the answers

    Which component connects the piston with the connecting rod in an engine?

    <p>Piston pin and bearing</p> Signup and view all the answers

    What is the function of the fuel injection nozzle in an engine?

    <p>Deliver fuel in the form of fine spray under pressure</p> Signup and view all the answers

    Which component operates the intake valve and exhaust valve in an engine?

    <p>Cam shaft</p> Signup and view all the answers

    What is the function of fly wheels in an engine?

    <p>Take care of fluctuations in speed by storing and releasing energy</p> Signup and view all the answers

    What is the purpose of the cooling water jackets in an engine?

    <p>Keep the combustion space walls cool</p> Signup and view all the answers

    Study Notes

    Engine Components

    • A cylinder is the main part of an engine where fuel is burnt to develop power.
    • The inner diameter of a cylinder is called the bore, which allows for piston movement with rings.
    • A cylinder head closes one end of the cylinder and contains valves that admit air and fuel and discharge exhaust gases.

    Piston and Piston Rings

    • A piston closes the other end of the working space of the cylinder and transmits power developed by burning fuel to the crankshaft.
    • Piston rings lubricated with engine oil produce a gas-tight seal between the piston and cylinder liner.
    • The distance traveled by a piston from one end of the cylinder to the other is termed as stroke.

    Connecting Rod

    • A connecting rod changes and transmits the reciprocating motion of the piston to the continuously rotating crank pin during the working stroke.
    • The small end of the connecting rod is attached to the wrist pin located in the piston, and the big end has a bearing for the crank pin.

    Crankshaft

    • A crankshaft transmits power from the piston to the driven shaft.
    • The parts of the crankshaft supported by and rotating in the main bearing are called journals.

    Main Bearing

    • Main bearings support the crankshaft, which turns in these bearings.

    Crank Pin and Bearing

    • The crank pin and bearing is a bearing between the big end of the connecting rod and crank pin.

    Fuel Injection System

    • The fuel injection system consists of a fuel pump, fuel line, and fuel injector.
    • Fuel is delivered into the combustion space of the cylinder by an injection system.
    • The fuel injector delivers fuel in the form of a fine spray under pressure through small holes.

    Piston Pin and Bearing

    • The piston pin and bearing connect the piston with the connecting rod, allowing the piston to move in the cylinder.

    Exhaust Valve

    • The exhaust valve removes the products of combustion from the cylinder after they have done work on the piston.

    Camshaft

    • The camshaft is driven from the crankshaft by a timing gear on a chain.
    • The camshaft operates the intake valve and exhaust valve through the cam, cam followers, push rods, and rocker arms.

    Valve Springs

    • Valve springs serve to close the valve.

    Cylinder Block or Crankcase

    • The crankcase holds together the cylinder, piston, and crankshaft.
    • It is also called the cylinder block if the cylinder liners are inserted into it.

    Flywheel

    • A flywheel is used to take care of fluctuations in cyclic variations in speed.
    • It stores energy during the power stroke and releases it during other strokes, giving nearly constant output torque.

    Bed Plate

    • The lower portion of the crankcase, which is bolted to the foundation, is called the bed plate.

    Cooling Water Jackets

    • Cooling water enters the jackets in the cylinder head, which is comparatively hot, and passes on to the jackets for the cylinder.
    • Its purpose is to keep the combustion space walls cool.

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    Description

    Learn about the main components of an engine including the cylinder, cylinder head, piston, and piston rings. Understand the functions of each component in the engine system.

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