汽车维修基础电子技术培训ppt课件.ppt

Basic Theories and Math Objectives Describe how all matter exists. Explain what energy is and how energy is converted. Calculate the volume of a cylinder. Explain the forces that influence the design and operation of an automobile. Describe and apply Newton’s Laws of Motion to an automobile. Objectives Define friction and describe how it can be minimized. Describe the various types of simple machines. Explain the difference between torque and horsepower. Differentiate between a vibration and a sound. Explain Pascal’s Law and give examples of where it is applied to an automobile. Objectives Explain the behaviour of gases. Explain how heat affects matter. Describe what is meant by the chemical properties of a substance. Explain the difference between oxidation and reduction. Describe the origin and practical applications of electromagnetism. Matter All matter consists of atoms. Atomic structure: Protons Positively charged particles. Electrons Negatively charged particles. Neutrons No electrical charge. States of Matter Solid Particles are held together in a rigid structure. Liquid Particles break away from structure and form a solution. Gas Atoms or molecules break free from the body of the liquid. Forms of Energy Chemical – Energy available in fuel. Electrical – Energy available from a battery. Mechanical – Energy available from mechanical movement. Thermal – Energy available from heat. Radiant – Energy produced by light. Nuclear – Energy produced by a nuclear reaction. Common Automotive Energy Conversions Chemical to thermal Fuel burning in the cylinder Chemical to electrical Battery Common Automotive Energy Conversions Electrical to mechanical Starter motor cranking the engine. Thermal to mechanical Heat from combustion forcing the engines pistons downward rotating the engine. Mechanical to electrical Rotation of the generator armature. Electrical to radiant Light bulbs Mass and Weight Mass Is the amount of matter in an object. Size i