Formulary Generally Axle Load Distribution Payload Distribution Braking Distance Driving Force Work/Energy Radian Measure Tension (brake) Brake Force Brake Pedal Brake Force (wheel) De-/Acceleration Braking Distance Braking Period CO2 emission Density Torque Pressure Injection Quatity Electrical Power Riding Speed Centrifugal Force Gas Speed Speed Coaxial Gearbox Lever Ratio Hollow Cylinder Stroke-bore Ratio Displacement Power Output p.l. Hydraulic Ratio Capacity Piston Speed Piston Force Force Crank Mechan. Forces Fuel Consumption 1 Fuel Consumption 2 Fuel Consumption 3 Ciruit Area Circuit Ring Circumference Clutch Pedal Power (mechanical) Power (effective) Power (indicated) Efficiency Weight Wire Resistance Steering Ratio Volumetric Efficiency Air Ratio Venturi Air Resistance Parallel Circuit Planetary Gearbox Percent Rectangle Rectangle Column Friction Force Tyre Calculation Serial Circuit Rolling Resistance Cam Dwell Dwell Period Slip Spread of Gears Climbing Resistance Ratio Circumference speed Conversions Not Coaxial Gearbox Valve Opening Area Valve Opening Angle Valve Opening Period Compression Ratio 1 Compression Ratio 2 Amount of Heat Resistance Efficiency Cube Ignition Interval Cylinder
Whereas the dwell angle was measured in distributor-shaft degrees, previously the contact breakers were closed as a switch in the primary circuit of the ignition coil. This is important, even without contact breakers, because it determines the period of the electric charge. If the period is too short, not enough ignition energy is available, should it be too long, then the ignition coil can overheat and, should it be fused, then the fuse can blow.
If the distributor shaft has the same number of cams as the engine has cylinders, and each cam has an opening- and closing angle, then the sum of the opening- and closing angles adds up to 360°. The closing angle is always a percentage based on the amount of multiple cams that the engine has, thus, the sum of the opening- and closing angles. Therefore, in a four cylinder engine, an angle of 45° corresponds to a dwell-angle of 50%. 05/12
