Borgwarner Inc.

Borg-warner Automotive Gmbh

Borg-warner Automotive Transmission & Engine Components Corporation

Borg-warner Automative, Inc.

David C White

Philip J Mott

Michael Marsh

Thomas J Becker

Mark M Wigsten

Timothy J Ledvina

Kevin B Todd

Chad M McCloy

Timothy Wilton Kunz

Brian Thomas Kenyon

Shawn Blackmur

Harold J Fraboni

Roger G Young, Jr

James Sisson

Matthew C Rice

Allan C Harper

Randy J McDonald

Roger K Updike, Sr

A variable camshaft timing (VCT) system includes an independent camshaft phaser, receiving input from a crankshaft of an internal combustion engine, having an output coupled to one of an inner concentric camshaft or an outer concentric camshaft; and a dependent camshaft phaser, coupled to the other of the inner concentric camshaft or the outer concentric camshaft, comprising a half-Oldham link configured to permit radial movement of the inner concentric camshaft relative to the outer concentric camshaft in one radial direction and at least one pivotable arm configured to permit radial movement of the inner concentric camshaft relative to the outer concentric camshaft in another, different radial direction.

Variable camshaft timing system

A variable cam timing assembly () and method for an internal combustion engine of a motor vehicle includes a cam phaser () connected between an inner camshaft () and an outer camshaft () of a concentric camshaft (). A torsional drive mechanism () connects between the cam phaser () and the inner camshaft () for transmitting rotational torque. The torsional drive mechanism () permits adjustment for perpendicularity and axial misalignment of the inner and outer camshafts (), while maintaining a torsionally stiff coupling between the cam phaser () and one of the inner and outer camshafts () of the concentric camshaft (). The torsional drive mechanism () can be formed from one of a flexible shaft coupling (), a transversely split driven gear (), a transversely split sprocket ring gear (), a transverse face spline gear (), and a pin and slot combination drive ().

Concentric camshaft phaser torsional drive mechanism

A method and apparatus for a supercharger wherein pressurized air originating from the compressor side is fed into its gear box for draining the oil therein due to the reduced size of the gear box. The supercharger includes a gear case encompassing the drive gear and the driven gear. The gear case has at least one oil inlet in the gear case to receive oil, and at least one oil outlet on the gear case. An air passage has a first end connected to the compressor end down stream in relation to the compressor wheel, and a second end connected to the gear box, whereby pressurized air at the compressor end is disposed to be channeled toward the inside of the gear box for draining lubricating fluid therein.

Supercharger having pressure aided oil drain

A chain tensioner system having a hydraulic tensioner and a tensioner arm with a spring blade. A hydraulic tensioner applies force against the end of the tensioner arm. The arm is pivotally supported at one end and supported by the tensioner piston at the other end. A blade spring into inserted into the plastic shoe to provide tension to the arm.

Hydraulic tensioner having flexible blade arm

The present invention is directed to a roller chain and sprocket drive which has at least two sprockets with varied radial seating positions. The relative orientation of the sprockets are adjusted to provide favorable dynamics to the drive. This can include the minimization of the strand variation and providing the maximum strand variation for each chain strand to be phased differently than other strands.

Roller chain sprockets oriented to minimize strand length variation

Hydraulic tensioner having a flexible blade arm

A chain tensioning system includes a pair of tensioners located one on each side of a driving sprocket, such as a crankshaft sprocket, between the driving sprocket and each of two driven sprockets, such as balance shaft sprockets. The dual tensioning system provides a tensioner to absorb torsional vibrations from the driving shaft in each of the two relative rotational directions of the driving shaft.

Dual tensioner system for balance shaft drive

A chain and sprocket system includes a plurality of chains and sprockets. The system includes a central shaft, two chains, and two identical sprockets. Although the two sprockets have identical size, shape, and features, they can be assembled onto the central shaft in different orientations. These orientations are achieved by rotating one sprocket with respect to the other. Assembling one sprocket onto the shaft in a different orientation from a second sprocket results in a system where the outer sprocket teeth of one sprocket are phased with respect to the outer sprocket teeth of the other sprocket. In this way, a phased chain and sprocket assembly is composed of identical sprockets, which eases manufacture and assembly.

Sprocket assembly for a phased chain system

A chain tensioner comprising an integrated tensioner body and tensioner arm. The tensioner body includes a fluid reservoir and a tensioner bore. The tensioner arm includes a pivot bore with a pivot pin disposed in the pivot bore to pivotally mount the tensioner arm. A check valve connecting the fluid reservoir to the tensioner bore permits fluid to flow into the tensioner bore, but not into the fluid reservoir. A plunger is slidably fitted into the tensioner bore and biased out from the tensioner bore by the fluid pressure in the tensioner bore. As a result, the plunger is forced against a fixed boss, causing rotational movement of the tensioner body and tensioner arm.

Tensioner with integral body and arm

A chain assembly has pins extending through the guide links with minimal projection beyond the outside edge of the guide links. The minimal pin projection provides a chain assembly of narrow construction. Modular chain systems are also provided that permit manufacturing savings in the construction of chain systems of standard widths.

Chain assemblies with minimal pin projection

A self-guiding chain assembly includes a silent chain with inner and outer links having depending toes. Traditional guide links are replaced by inverted tooth outer links with a crotch of lesser height than the crotch of the inner links. The outer links perform the self-guiding function and act to maintain the chain on the sprockets. The chain has particular application in engine timing systems that utilize phased chains and sprockets.

Self-guided chain assemblies

A guide link for use in a power transmission chain having a plurality of other links. The other links have a pair of spaced apertures and have a thickness and a hardness. The guide link has a pair of spaced apertures surrounded by a pair of upward extending toes. The toes have an outside flank and an inside flank with the inside flanks joined by a rounded crotch. The root of the crotch depends below the uppermost portion of the apertures. The thickness and hardness of the guide link is different from the other links so that the guide link has a yield load that is less than the yield load of the other links.

Chain guide link

A blade-type chain tensioner constructed from a plastic shoe and a blade spring. The shoe is slightly arcuate and has a pocket along its concave side. At each end of the pocket is a cavity. The blade spring is substantially more arcuate than the shoe and is rectangular. The blade spring is further dimensioned to allow each end of the blade spring to be mounted in the pocket having an end in each cavity at the end of a shoe. Through this configuration the blade spring is mechanically interlocked with the shoe without the use of fasteners or cutouts. The blade spring places a load on the shoe and causing the shoe to creep at an elevated temperature and thereby provide tension to a chain.

Spring blade chain tensioner

A power transmission (10) chain-belt (32) is disclosed that is especially aptable for connecting the pulleys (12, 14) of a pulley transmission (10). The chain-belt (32) has a plurality of interleaved sets (34) of links (36) and each set (34) has a plurality of transversely arranged links (36). Pivot means (40) join adjacent sets (34) of links (36) to form an endless loop. At least one toe (42A, 42B) extends from each link (36) in at least some sets (34) of links (36). At least the toes (42A, 42B) on adjacent links (36) are in opposed relationship and define a passageway (80). A plurality of load blocks (50) are connected to the sets (34) of links (36). The load blocks (50) are positioned in the passageways (80) defined by the toes (42A, 42B). Each load block (50) has edge surfaces ( 88) for contacting the pulleys (12, 14) of the transmission (10). At least one spring link (131) positioned in said sets (34) of interleaved links (36). The spring link (131) has a pair of spaced apart, opposed toes (132A, 132B) that define a channel (134) for receiving a load block (50). The channel (134) of the spring link (131) has a press fit with the load block (50) whereby the spring link (131) restrains the load block (50) from movement transverse to the direction of travel of the chain belt (32) and retains the load block (50) in the passageway (80) defined by the sets (34) of links (36).

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Dryden, NY, United States of America

David C White