Command input unit for controlling adaptive vehicle cruise controller, has situation dependent variable tactile sense level by controlling strength of pushbutton reset spring

摘要

A pushbutton control unit (110) has operating surface (132) which operates against a reset spring (137). A control module (138) monitors operating conditions which determine whether or not an automatic system should be activated by varying the output of a function generator (130) which controls the strength of the reset spring. If this allows the pushbutton to be depressed, so activating the automatic system. A contact (136) initiates a system activated signal.