This design combines accelerator and brake into one pedal for automatic-transmission vehicles, with mutually exclusive operation across the pedal travel.
How it works
A cam at the pedal axis and a follower linked to the brake master cylinder release the brakes smoothly until the “half-press” point, after which pedal travel engages the accelerator linkage. On release, the accelerator returns to idle and the follower runs down the cam profile to reapply braking. :contentReference[oaicite:6]{index=6}
Diagram & Description
Brake master cylinder (1) with piston (2) connects via rod (3). Spring (4) biases the pedal to the brake-applied position. The pedal (around axis 14) carries cam (8) with groove (7). Follower (6) linked to shaft (3) tracks the groove. Up to half travel the brakes are progressively released; beyond half, limb (15) couples to the accelerator (11) for throttle input; releasing the pedal decouples the accelerator and reapplies the brakes.