Automotive Service Modern Auto Tech Study Guide Chapter 12 Pages 162 - 181 Engine Classifications & Variations 35 Points Automotive Service 1-12. List at least 12 common ways to classify engines by their variations in design: Year Cooling System Make (Manufacturer of the engine) Location of Engine in the Vehicle Horsepower or Watts Mounting: Transverse or Longitudinal Torque Piston or Rotary # of Cylinders Cycle of Operation Cylinder Arrangement Compression Ratio Cylinder Numbering Ignition System # of Valves Spark or Compression Ignition Valve Arrangement Bore # of Camshafts Stroke Camshaft Location (OHV or OHC) Camshaft Drive: Gear, Chain, Belt Firing Order Displacement = Total Cylinder Volume Turbo or Super Charged or Neither Fuel Type: Diesel or Gas Fuel Delivery System (MPI or GDI) Atkinson Cycle or Miller Cycle Automotive Service Click this square for a 4 stroke cycle engine explanation Automotive Service 13. Name three engine cylinder arrangements: In-Line, V-shape, Flat or “Boxer”, Slant Automotive Service 14. ______________ ____________ is the sequence in which the cylinders fire or ignite their air/fuel mix. Pecking Order Firing Order Back Order Automotive Service Automotive Service 15. Engines can be either __________ or ______ cooled. ____________ cooling is the most common. Air or Liquid Gas or Water Vacuum or Pressure Automotive Service Automotive Service 16. Spark ignition engines use a ________ plug to ignite their air/fuel mixture. ____________________ ignition engines use the intense heat of a 20:1 compression ratio to ignite the fuel. (these are diesel engines) Glow Plug Freeze Plug Spark Plug Compression Combustion Combination Automotive Service 17. Valve arrangements are either ___-head, ___-head, ___-head or ___-head. (remember the word LIFT) The I-head design, a.k.a. the valve-in-head or Over Head Valve (OHV) design is the most common in use. L-head, I-head, F-head, T-head Automotive Service Automotive Service 18. Camshafts can be located in the engine block or in the ______________ ________. (Over Head Camshaft = OHC) Over Head Camshaft Piston Combustion Chamber Cylinder Head Over Head Valve Automotive Service Click this square for a diesel engine explanation Automotive Service 19. There’s a variety of ___________________ chamber shapes, but the hemishperical is one of the most efficient. Combustion Compression Combination Automotive Service 20.Variable DISPLACEMENT, variable COMPRESSION ratio, and variable VALVE timing are now popular designs used to increase horsepower and fuel mileage. Automotive Service 20.Variable DISPLACEMENT, variable COMPRESSION ratio, and variable VALVE timing are now popular designs used to increase horsepower and fuel mileage. Automotive Service 20.Variable DISPLACEMENT, variable COMPRESSION ratio, and variable VALVE timing are now popular designs used to increase horsepower and fuel mileage. Automotive Service Displacement on Demand® Automotive Service Automotive Service 21. The ____________ engine, also known as the Wankel engine uses a spinning triangular rotor instead of conventional pistons. It is currently used in only the Mazda RX-8 and called the Renesis® engine. Rotax Rotary Romulan Dr. Felix Wankel Automotive Service Automotive Service Click this square for a rotary engine explanation Automotive Service 21. ______ stroke cycle engines produce power with every down stroke. Some diesel engines and some lawn & garden applications use this design, but no automobiles currently use it. 2 Stroke cycle 3 Stroke cycle 4 Stroke cycle Automotive Service Click this square for 2 stroke cycle engine explanation Automotive Service 22. Engines are also classified by whether they “breath” normally or are ____________________ like the Miller-cycle engine. Turbocharging the incoming air with an exhaust-powered fan is also popular. http://auto.howstuffworks.com/supercharger.htm Supercharged Super-sized Superceded Automotive Service Click this square for Supercharger & Turbocharger explanation Automotive Service In-Line 4 Cylinder Engine Cylinder #1 is the most forward cylinder Bank 1 on a V-shaped engine has cylinder #1 V-8 Cylinder Engine Automotive Service Automotive Service .