1970-02-01

Brake System Performance at Low Operating Pressures 700512

The role of air brake system pneumatic pressure and time differentials in total vehicle brake system performance is discussed. The magnitude of pressure differentials for typical air brake system valves is shown and the significance of both ascending and descending differential discussed. Transmission times for typical combination vehicles are shown and the effect of both pressure and time differentials at various axles on the proportioning of brake system work is developed. A number of means to deliberately unbalance pneumatic systems to compensate for unbalance in other components and thereby achieve better total brake system balance are discussed.

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