Compound electropneumatic brake control system

Claim 1

A compound electropneumatic brake control system for a train having powered motor M cars and nonpowered trailer T cars comprising, a compound brake power command controller for conveying a compound brake power command signal to an electric brake command controller and to a first-second summing operator, said electric brake command controller conveys an electric brake command signal to an electric brake system, to a first summing operator, and to said first-second summing operator, said electric brake system conveys an electric brake power equivalent signal to said first summing operator, said first summing operator is coupled to an M car weight setter and to a T car weight setter, said M car weight setter is connectable by a first switch to a third-summing operator and is connectable by a second switch to a fourth summing operator, a second-second summing operator is coupled to said third-second summing operator, said third-second summing operator is coupled to a third and a fifth summing operator, said compound brake power command signal is conveyed to another T car weight setter which is coupled to said third summing operator, said third summing operator is coupled to said fourth and said fifth summing operator, said fourth summing operator is coupled to an M car fluid brake system, and said fifth summing operator is coupled to a T car fluid brake system wherein any deficiency in the electric brake system is supplemented by said M car and T car fluid brake system when said compound brake power command signal is less than the maximum adhesion brake power equivalent signal and to supplement the deficiency in said T car fluid brake system prior to said M car fluid brake system when said compound brake power command signal is greater than the maximum adhesion brake power equivalent signal.