Abstract: A multi-function steering column switch assembly for a vehicle comprising a mounting body (15) for attachment to a stationary part (11, 12) of the vehicle steering column assembly in use, a plurality of manually operable switch mechanisms (16, 17) secured to the mounting body, a circuit board arrangement (19, 21, 22) carried by said mounting body, means electrically connecting the contacts of said switch mechanisms with respective conductors of the contact board arrangement, active electronic components carried by the circuit board arrangement for interpreting signals generated by operation of the contacts of said switch mechanism and for generating corresponding databus messages, and, connection means on said circuit board arrangement for connecting said active components to the vehicle databus in use.

Abstract: A system for limiting the speed of a gasoline engine includes a circuit responsive to the engine speed which provides control signals to a solenoid valve which in turn controls a vacuum actuator. The vacuum actuator then overrides a manual throttle control to move the throttle towards closed position when a governed engine speed is approached. The control circuit provides a signal having three components: one proportional to engine speed, a second proportional to engine acceleration and a third which is the integrated difference between the engine speed and a preset governed speed. In addition, the third signal is high at low engine speed and gradually diminishes as engine speed increases to intermediate or high values. The control signal controls a duty cycle oscillator which actuates the solenoid valve. The duty cycle oscillator is inhibited at low speeds to prevent interference with manual throttle control.