FIGURE 2 Linearly acting, twin-shoe, internal drum brake with pneumati

Chapter

ABSTRACT

To calculate the torque, we must first find an expression for the lining pressure. Guided by the geometry shown in Figure 4, we see that the lining pressure will be given by

(1-1)

in terms of the lining deformation ∆ if the shoe and drum are assumed to be absolutely rigid. Maximum pressure occurs when , so that pmax=k∆. Thus equation (1-1) becomes

(1-2)

and the incremental tangential friction force is given by

FIGURE 2 Linearly acting, twin-shoe, internal drum brake with pneumatic activation (Girling Twinstop). (Reprinted with permission. ©1977 Society of Automotive Engineers, Inc.)

ABSTRACT