Wheeled Vehicle Engines

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Wheeled Vehicle Engines

Wheeled Vehicle Engines
General
Preface
Table of Contents
Table of Contents - Continued
Administrative Instructions
Introduction to Wheeled Vehicle Engines
Lesson 1: Fundamentals Of Spark - Ignition Engines
Combustion
Figure 1. Air-Cooled Engine
Figure 2. Liquid- Cooled Engine
Figure 3. L - Head Engine
Figure 4. T- Head Engine
Figure 5. I- Head Engine
Figure 6. F- Head Engine
Cylinder Arrangement
Figure 8. V - Type Engine
Basic One-Cylinder Engine
Engine Block
Valves
Crankshaft
Camshaft.
Accessory Systems
The Four- Stroke Cycle
Figure 10. Piston Positions
Figure 11. Intake Stroke.
Compression Stroke
Power Stroke
Exhaust Stroke
Engine Operation - Four-Stroke Cycle
The Two - Stroke Cycle
Engine Operation - Two-Stroke Cycle
Figure 26.The Two - Stroke cycle.
Engine Operation - Two-Stroke Cycle - Continued
Describe Components and Construction of Multicylinder Engines
Cylinder Head
Cylinder Head cont.
Crankcase
Figure 20. Piston
Figure 21. Cam - Ground Piston
Piston Rings
Figure 23. Piston Pin.
Figure 24. Fixed Pin
Figure 25. Semifloating Pin
Figure 26. Full - Floating Pin.
Connecting Rods
Crankshaft
Figure 29. Crankshaft Throw Arrangements.
Crankshaft - Continued
Figure 30. Vibration Damper
Figure 31. Flywheel
Valves and Operating Mechanism
Figure 33. Overhead Valves.
Figure 34, Overhead Cam.
On V-type and Horizontal-Opposed Engines
Figure 35. Hydraulic Valvet Tappet
Figure 36. Camshaft Drives
Practice Exercise
Answers to Practice Exercise
Lesson 2. Fundamentals of Compression-Ignition Engines
Four - Stroke - Cycle Operation
Figure 37. Four Stroke Cycle Diesel Engine.
Four - Stroke - Cycle Operation - Continued
Figure 28. Open type- Combustion Chamber
Figure 39.Turbulence Chamber
Figure 40. Precombustion Chamber
Image Figure 41. Intake Stroke
Figure 42. Compression Stroke
Image: Figure 43. Power Stroke
Image: Figure 44. Exhaust Stroke
Multifuel Engine
Image: Figure 45. Multifuel Engine
Multifuel Engine - Continued
Multifuel Engine - Continued
Describe Princples Of Operation And Construction Of Two Strole Engines
Figure 46. Scavenging (Intake) Stroke
Figure 47. Compression Stroke
Figure 48. Power Stroke
Figure 49. Exhaust Stroke
Practice Exercise
Answers to Practice Exercise 2
Lesson 3. Engine Inspection
Record All Faults
Oil Level
Accessories
Oil Pressure
Noises
Engine Temperature
Road Test
Exhaust
Describe Spark-Ignition EngineTesting Procedures
Compression Testing
Intake Manifold Pressure (VACUUM) Test
Vacuum Readings
Figure 50. Vacuum Gage Readings
Vacuum Readings - Continued
Vacuum Readings - Continued
Practice Exercise
Answer to Practice Exercise 3
Lesson 4. Engine Lubrication Systems
Operation Of Lubrication Systems
Figure 21. Splash - Type Lubrication System
Operation Of Lubrication Systems - Continued
Figure 52. Combination Splash and Force-Feed Lubrication System
Figure 53. Force Feed Lubrication System
Figure 54. Full -Force-Feed Lubrication System
Subassemblies of the Lubrication System
Figure 55. Oil Level Gage
Figure 56. Oil Pickup
Figure 57. Gear-Type Pump
Figure 58. Rotor -Type Pump
Figure 59. Oil Pressure Relief Valve
Figure 60. Oil Pump With Relief Valve
Figure 61. Full-Flow Filter System
Subassemblies of the Lubrication System - Continued
Figure 62. Bypass Filter System
Figure 63. Typical Engine Lubrication System
Subassemblies of the Lubrication System - Continued
Describe Purpose of Crank Case Ventilation System Operation
Figure 64. Draft Tube System
Describe Purpose of Crank Case Ventilation System Operation - Continued
Figure 65. PCV System
Figure 66. PCV Valve
Describe Purpose of Crank Case Ventilation System Operation - Continued
Describe Maitanance Procedures for Engine Lubrication Systems
Describe Maitanance Procedures for Engine Lubrication Systems - Continued
Describe Maitanance Procedures for Engine Lubrication Systems - Continued
Practice Exercise
Answer to Practice Exercise 4
Lesson 5. Engine Cooling Systems
Methods of Cooling
Liquid - Cooling System
Coolant Pump
Figure 68. Coolant Pump Construction
Radiator
Figure 69. Engine Radiator Construction
Figure 70. Coolant Flow Through Radiator
Fan
Thermostat
Thermostat - Continued
Figure 72. Thermostat and Housing
Figure 73. Coolant Flow - Thermostat Closed
Figure 74. Coolant Flow - Thermostat Open
Thermostat - Continued
Figure 75. Pellet - Type Thermostat
Pressure Radiator Cap
Figure 76. Pressure Radiator Cap
Expansion Plug
Coolant Solutions
Describe Maintenance and Troubleshooting Procedures of Liquid - Coooling Systems
Radiator Cap
Fan Belts
Coolant Pump
Cylinder Block and Head
Cylinder Block and Head - Continued
Cylinder Block and Head - Continued
Preventive Cleaning
Troubleshooting
Engine Overheats
Engine Fails to Reach Operating Temperature
Practice Exercise
Answer Practice Exercise

Wheeled Vehicle Engines

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