Abstract: Among other things, a rowing exercise machine includes a movable inertial element, an eddy current brake coupled to the movable inertial element, a rowing grip coupled to the movable inertial element, and control circuitry coupled to the eddy current brake to cause a resistance to motion of the rowing grip during part of a rowing stroke. The resistance to motion of the rowing grip during the drive phase of the rowing stroke conforms to a target feel for a rower. The target feel corresponds to a feel for a rower of a target other rowing exercise machine or other target feel of interest.

Abstract: A chain drive system having chain links, guide links disposed on opposite lateral sides of the chain links, and pivot pins that extend through the chain links and are fixedly coupled to the guide links. Mating anti-rotation features are employed between each pivot pin and a corresponding one of the guide links to resist rotation between the pivot pin and the guide link.

Abstract: A chain drive system having chain links, guide links disposed on opposite lateral sides of the chain links, and pivot pins that extend through the chain links and are fixedly coupled to the guide links. Mating anti-rotation features are employed between each pivot pin and a corresponding one of the guide links to resist rotation between the pivot pin and the guide link.

Abstract: A method of performing regular maintenance in a hybrid drive module, comprising a housing (170) enclosing a continuous member drive (120) comprising a chain or a belt (126) connecting an electrical motor (110) with a crank shaft (22) of an associated internal combustion engine (20) via at least one coupling (130, 140), said electrical motor (110) being fastened with respect to the crank shaft (22) via fastening elements (111) wherein said method comprises: unfastening the electric motor (110) from said motor's (110) fastening elements (111); positioning the electric motor (110) such that the crankshaft (22) is a distance (d) from the electric motor (110) and such that tension in the chain or belt (126) is at or above a pre-specified level; and re-fastening fastening elements (111) such that the electric motor (110) is maintained at the distance (d) from the crankshaft (22).

Abstract: A compliant snubber for a chain is disclosed. The snubber preferably includes an elastomeric body and metal bushings. The compliance feature allows the snubber to be located with a negative clearance to the back side of the chain without causing excessive surface loads that may result in excessive snubber surface wear, thereby improving the effectiveness of the snubber in the application. The compliant snubber has the added advantage of reducing the costs associated with manufacturing the snubber and assembling the snubber into a chain system.

Abstract: A two speed engine accessory drive including a gear case 12 and an input shaft 26 rotatable about an axis that is concentric with the central gear case axis 54. The input shaft 26 carries a drive sun gear 38. A driven sun gear 78 is positioned adjacent to the drive sun gear and is attached to an accessory drive shaft 91 that is rotatable about an axis that is concentric with the central gear case axis 54. A compound planet gear 66 is supported by a planet gear carrier 52 that is rotatable about the central gear case axis 54. The compound planet gear 66 includes a rigid insert 70, a first plastic planet gear 76 secured to the insert and in mesh with the drive sun gear 38, and a second plastic planet gear 76 secured to the insert and in mesh with the driven sun gear 78. A brake band 98 is operable to allow or prevent rotation of the planet gear carrier 52.

Abstract: A centrifugally controlled two-speed accessory drive for operation of one or more automotive vehicle accessories to provide a two-stage operation depending on the engine speed, the drive including a gear box secured to the face of the accessory and having an input shaft driven by a pulley and belt from the engine, an output shaft driving the accessory, and a planetary gear set connecting the shafts. The gear set includes a sun gear connected to the output shaft, a ring gear rotatably mounted in the gear box and a planet carrier rotatable with the input shaft and mounting a plurality of planetary gears between the sun gear and ring gear. A cone clutch engages the ring gear to ground it through a Belleville spring, piston and fulcrum, and centrifugal weights act to unground the ring gear; a one-way clutch between the shafts allows the output shaft to overrun the input shaft when the ring gear is grounded and rotate the output shaft with the input shaft as a unit when the ring gear is ungrounded.