Unit 1 Engine Operating Principle　Text A Four-stroke Engine　Text B Two-stroke Engine　ExercisesUnit 2 Engine Technology　Text A Piston Connecting Rods and Crankshaft　Text B Valve System　ExercisesUnit 3 Fuel System　Text A Fuel Injection System　Text B Fuel Delivery System　ExercisesUnit 4 Engine Ignition System　Text A Ignition System Principle　Text B Ignition System Structure　ExercisesUnit 5 Cooling System　Text A Cooling System Principle　Text B The Components of Cooling System　ExercisesUnit 6 Engine Charging and Starting System　Text A Charging System　Text B Starting System　ExercisesUnit 7 The Power Train　Test A Clutch and Manual Transmission　Text B Propeller Shafts and Differential　Exercises Unit 8 Automatic Transmission　Text A Automatic Transmission　Text B Continuously Variable Transmission　ExercisesUnit 9 Automobile Suspension System　Text A Suspension System　Text B Wheel Alignment　ExercisesUnit 10 Automobile Steering System　Text A Steering System　Text B Power Steering　ExercisesUnit 11 Automobile Brake System　Text A Brake System　Text B Anti-lock Brake System　ExercisesUnit 12 Automobile Frame and Body　Text A Automobile Frame　Text B Automobile Body　ExercisesUnit 13 Body Power Control System　Text A Power Door Locks and Power Windows 　Text B Windshield Wiper　Exercises Unit 14 Car Maintenance　Text A Basic Car Maintenance　Text B On Board Diagnostics　ExercisesAppendix A VocabularyAppendix B Automobile LabelReference