Abstract: A tone wheel for generating electrical pulses at a rate proportional to the rotational speed of a road wheel. The tone wheel is stamped from sheet steel stock and is characterized by elongated, axially extending teeth supported in cantilever fashion from one end on roots extending radially from a center portion of the tone wheel. The teeth are spaced from each other and for a major portion of their length are free of adjacent structure so that they produce a sharp pulse when scanned by a sensor and are self-cleaning to reduce the risk of accumulating dirt and debris which can otherwise result in destruction of the sensor.

Abstract: A tone wheel for generating electrical pulses at a rate proportional to the rotational speed of a road wheel. The tone wheel is stamped from sheet steel stock and is characterized by elongated, axially extending teeth supported in cantilever fashion from one end on roots extending radially from a center portion of the tone wheel. The teeth are spaced from each other and for a major portion of their length are free of adjacent structure so that they produce a sharp pulse when scanned by a sensor and are self-cleaning to reduce the risk of accumulating dirt and debris which can otherwise result in destruction of the sensor. In other embodiments of the invention, a signal wheel is a composite of a ferromagnetic steel and a non-magnetic material such as plastic. The non-magnetic material serves to block entry of debris or oil into the gaps between the teeth thereby reducing the risk of damage from solid debris or reducing churning and aeration of oil in which the wheel may run.

Abstract: A first part of an engine valve (10) is centered on an axis (A) and comprises a hollow metal member (100) having an outwardly flared first end portion (102) and a second end portion (104). The hollow metal member (100) has a chamber (106) extending axially throughout the member. The chamber (106) is open at the first end portion (102). A second part of the engine valve (10) is centered on the axis (A) and comprises a metal piece (130) coaxial with the hollow metal member (100). The metal piece (130) has first and second ends (132 and 134). The first end (132) has a first weld connection to the second end portion (104) of the hollow metal member (100). The metal piece (130) has a solid cross-section portion between the first and second ends (132 and 134). The metal piece (130) has a circumferential groove (150) in the solid cross-section portion.

Abstract: A poppet valve (10) has a disk-shaped head (12), an elongated stem (16), and a tapered neck (24) between the head (12) and the stem (16). The neck (24) has an outer surface (32) with an undulating circumferential contour. The undulating circumferential contour improves component strength and heat transfer efficiency, and may also influence valve rotation and inlet charge swirl.