Abstract: A system and method for actively compensating excessive noise, vibration, and harshness (NVH) in a vehicle front suspension is provided. The method includes sensing a vibration in the vehicle front suspension; generating an input signal representing the vibration in the vehicle front suspension; filtering the input signal using a bandpass filter; and calculating a compensation signal using a proportional-integral-derivative (PID) controller. The method also includes generating a compensation torque, based on the compensation signal, by an electric power steering (EPS) system motor, with the motor coupled to the vehicle front suspension. Method steps for enabling and disabling the active compensation system are also provided. The active compensation is enabled in response to a turn-on criteria being satisfied. The turn-on criteria may include suspension vibration above a threshold, and the suspension vibration being not caused by driver input.

Abstract: A differential angle sensor for measuring a differential angle between an input shaft and an output shaft includes a target assembly fixed to rotate with one of the shafts and a ring magnet with equidistantly spaced magnet segments fixed to rotate with the other one of the shafts. The target assembly includes four identical targets extending about the common axis parallel and axially spaced apart from one another, and each having a plurality of wedge-shaped teeth extending radially toward the ring magnet. A first magnetic field sensor is disposed between first and second targets for measuring a first magnetic field strength therebetween. A second magnetic field sensor is disposed between third and fourth targets for measuring a second magnetic field strength. The targets are all circumferentially offset relative to one another such that the magnetic field strengths each vary with the differential angle between the shafts and differently from one-another.

Abstract: A torque and angular sensor includes a differential angle sensor to precisely measure a differential angle between an input shaft and an output shaft and an angular position sensor to measure the angle of at least one of the shafts over a full angular range. The differential angle sensor measures an output rotation angle of an output target and an input rotation angle of an input target using changing voltages in taps on the input and output coils, which each carry an AC excitation current and which are each inductively coupled with teeth on targets fixed to rotate with one of the shafts. Input shaft rotation angle region is combined with the input angular position as a rotation angle composite. A raw torque angle is determined based on the difference between the input and output rotation angles. Rotational and Linear compensation provides a high-precision torque angle.

Abstract: A worm shaft (46) has a first end section (52) and a second end section (54) extending from a worm section (50). A first drive system (98) is in driving engagement with the first end section (52) of the worm shaft (46), and a second drive system (104) is in driving engagement with the second end section (54) of the worm shaft (46) for redundantly steering a vehicle. The worm section (50) of the worm shaft (46) is disposed between the first drive system (98) disposed on the first end section (52) of the worm shaft (46) and the second drive system (104) disposed on the second end section (54) of the worm shaft (46). A lost motion connection (82) is disposed between an input shaft (76) and said worm shaft (46).

Abstract: A steering gear housing and method of manufacturing same are provided. The steering gear housing is comprised of aluminum alloy and is at least partially anodized. The steering gear housing defines a plurality of mounting apertures. A plurality of nuts is fit into a respective one of the mounting apertures for use in mounting to a vehicle. Each of the nuts defines a plurality of splines for establishing a press-fit relationship between the mounting apertures and the nuts. The method involves casting a steering gear housing defining a plurality of mounting apertures out of aluminum alloy. Next, the casted steering gear housing is at least partially anodized. After anodization, a plurality of nuts is fit into respective ones of the mounting apertures. The nuts define splines for allowing a press-fit relationship to be established between the mounting apertures and the nuts.