Sensor assembly and method for non-intrusively sensing instantaneous speed of the engine of a vehicle

摘要

The assembly has a housing (22) comprising a recess (23) configured to affixingly engage an externally accessible bolt. The motion sensing device e.g. rotating accelerometer, (30) provides a respective output signal indicative of angular motion information of a crankshaft. A signal transmitter e.g. infrared transmitter (28), coupled to the device transmits the output signal from the motion sensing device. An independent claim is also included for a method for non intrusively sensing instantaneous speed of an engine comprising a crankshaft having a respective end rotatingly connected to an externally accessible bolt.