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  2. Brake-specific fuel consumption - Wikipedia

    en.wikipedia.org/wiki/Brake-specific_fuel...

    To calculate the actual efficiency of an engine requires the energy density of the fuel being used. Different fuels have different energy densities defined by the fuel's heating value. The lower heating value (LHV) is used for internal-combustion-engine-efficiency calculations because the heat at temperatures below 150 °C (300 °F) cannot be ...

  3. Brake horsepower per cubic centimeter - Wikipedia

    en.wikipedia.org/wiki/Brake_horsepower_per_cubic...

    Brake horsepower per cubic centimeter or (bhp/cc) is a figure of merit that is used to indicate the 'state of tune' of an internal combustion engine. It is defined as the ratio of the engine's net power output to its displacement, the internal size. Power is measured at its rated speed and full throttle.

  4. Braking distance - Wikipedia

    en.wikipedia.org/wiki/Braking_distance

    Braking distance refers to the distance a vehicle will travel from the point when its brakes are fully applied to when it comes to a complete stop. It is primarily affected by the original speed of the vehicle and the coefficient of friction between the tires and the road surface, [Note 1] and negligibly by the tires' rolling resistance and vehicle's air drag.

  5. Brake tester - Wikipedia

    en.wikipedia.org/wiki/Brake_tester

    During the test, the computer measures the brake force values and the system will calculate the imbalance between the left and right brake forces of an axle, as well as the brake efficiency of the service brake and the parking brake provided that a vehicle weight is either inputted manually or by using an integrated weighing system. [2]

  6. Brake balance - Wikipedia

    en.wikipedia.org/wiki/Brake_balance

    The brake balance or brake bias of a vehicle is the distribution of brake force at the front and rear tires, and may be given as the percentage distributed to the front brakes (e.g. 52%) [1] or as the ratio of front and rear percentages (e.g. 52/48). [2]

  7. Mean effective pressure - Wikipedia

    en.wikipedia.org/wiki/Mean_effective_pressure

    Speed has dropped out of the equation, and the only variables are the torque and displacement volume. Since the range of maximum brake mean effective pressures for good engine designs is well established, we now have a displacement-independent measure of the torque-producing capacity of an engine design – a specific torque of sorts.

  8. Brake force - Wikipedia

    en.wikipedia.org/wiki/Brake_force

    British Railway Class 90 infobox showing brake force Brake force to weight ratio of the Class 67 is higher than some other locomotives. In the case of railways, it is important that staff are aware of the brake force of a train so sufficient brake power will be available to bring the train to a halt within the required distance from a given speed.

  9. Prony brake - Wikipedia

    en.wikipedia.org/wiki/Prony_brake

    Prony brake dynamometers at a tractor contest in 1910 Schematic of a Prony brake Actual Prony Brake built for testing 5HP Steam Engine. The Prony brake is a simple device invented by Gaspard de Prony in 1821 to measure the torque produced by an engine. The term "brake horsepower" is one measurement of power derived from this method of measuring ...