Abstract: Methods and systems are provided for diagnosing a gasoline particulate filter in an engine exhaust passage. A pressure-flow relationship of the filter is learned in a low engine speed and high engine speed range. Degradation of the filter is identified based on a substantial separation between the curve fits at the high and low speed range.

Abstract: Methods and systems are provided for diagnosing a gasoline particulate filter in an engine exhaust passage. A pressure-flow relationship of the filter is learned in a low engine speed and high engine speed range. Degradation of the filter is identified based on a substantial separation between the curve fits at the high and low speed range.

Abstract: Techniques for layout for a touch input surface are described. Generally, the described techniques enable a touch input surface and/or combination of touch input surfaces to be characterized as a single logical input surface. Based on different contextual factors, the single logical input surface can be divided into different touch input zones that can each receive touch input to invoke a different respective functionality. In at least some implementations, different haptic effects can be output to correspond to different touch input zones.

Abstract: Techniques for haptic effect on a touch input surface are described. Generally, haptic effects are provided for different user interactions with a touch input surface, such gestures applied to a touch pad and/or a touchscreen to interact with applications, services, system-level functionalities (e.g., operating system user interfaces), and so forth. According to various implementations, haptic effects can be output based on visual and/or functional attributes of a particular device environment, and/or based on attributes of a gesture used to apply touch input.

Abstract: Techniques for layout for a touch input surface are described. Generally, the described techniques enable a touch input surface and/or combination of touch input surfaces to be characterized as a single logical input surface. Based on different contextual factors, the single logical input surface can be divided into different touch input zones that can each receive touch input to invoke a different respective functionality. In at least some implementations, different haptic effects can be output to correspond to different touch input zones.

Abstract: Techniques for haptic effect on a touch input surface are described. Generally, haptic effects are provided for different user interactions with a touch input surface, such gestures applied to a touch pad and/or a touchscreen to interact with applications, services, system-level functionalities (e.g., operating system user interfaces), and so forth. According to various implementations, haptic effects can be output based on visual and/or functional attributes of a particular device environment, and/or based on attributes of a gesture used to apply touch input.

Abstract: A dual-crankshaft engine is presented. In one embodiment, the engine includes a first crankshaft and a second crankshaft. The second crankshaft is coupled with the first crankshaft such that the first crankshaft and the second crankshaft are horizontally coplanar. The engine further includes a first piston that is operable to reciprocate in a first horizontal cylinder via coupling with the first crankshaft, and a second piston that is operable to reciprocate in a second horizontal cylinder via coupling with the second crankshaft. The second horizontal cylinder is horizontally collinear with and opposing the first horizontal cylinder.

Abstract: A computer-implemented method for performing security scans may include 1) generating a first hash of a first file, 2) performing a first security scan on the first file, 3) storing the first hash to indicate a result of the first security scan of the first file, 4) identifying a second file and generating a second hash of the second file, 5) determining that the second hash of the second file is equivalent to the first hash of the first file and, in response, determining that the result of the first security scan of the first file applies to the second file, 6) identifying a third file and determining that the third file is volatile, and 7) performing a second security scan on the third file instead of generating a third hash of the third file. Various other methods, systems, and computer-readable media are also disclosed.

Abstract: A dual-crankshaft engine is presented. In one embodiment, the engine includes a first crankshaft and a second crankshaft. The second crankshaft is coupled with the first crankshaft such that the first crankshaft and the second crankshaft are horizontally coplanar. The engine further includes a first piston that is operable to reciprocate in a first horizontal cylinder via coupling with the first crankshaft, and a second piston that is operable to reciprocate in a second horizontal cylinder via coupling with the second crankshaft. The second horizontal cylinder is horizontally collinear with and opposing the first horizontal cylinder.

Abstract: A system and method for controlling an internal combustion engine operable with a first cylinder firing frequency and a second cylinder firing frequency to reduce or eliminate transmission of torsional vibrations associated with the second cylinder firing frequency to reduce or eliminate constraints on reduced displacement mode operation using a closely coupled drive train component rotating in an opposite direction relative to rotating components of the engine. A close coupling device allows the inertia of the counter-rotating elements to reduce or eliminate the torque reaction of the drivetrain associated with acceleration and deceleration of the engine crankshaft in response to the second cylinder firing frequency in the reduced displacement mode.

Abstract: An internal combustion engine having two cylinder banks and adjustable camshaft timing is disclosed in which the camshafts in one cylinder bank are adjusted so that there is no net flow from the cylinders to effectively disable the cylinder bank. In particular, exhaust valve timing is advanced so that the maximum valve lift occurs approximately at bottom center between expansion and exhaust strokes and intake valve timing is advanced so that maximum valve lift occurs approximately at bottom center between intake and compression strokes. Also disclosed is an engine in which an intake and an exhaust camshaft on a single bank are coaxial with valve timings adjusted by rotating the inner of the two camshafts with respect to the outer of the two camshafts.

Abstract: A device for selectively changing phase relationship between first and second rotating shafts in an internal combustion engine where the first shaft is secured for rotation with a worm carrier assembly and the second shaft is secured for rotation with a worm gear includes first and second worms disposed for rotation within the worm carrier assembly and having torsional preloads with opposite hands of rotation and meshing with the worm gear. An actuator turns the first and second worms in a first direction to advance rotation of the second shaft relative to the first shaft and turns the first and second worms in a second direction to retard rotation of the second shaft relative to the first shaft.

Abstract: An Oldham-style coupling assembly wherein a driving shaft (12) is rotatably coupled to a driven shaft (32) using a reduced-lash flexible coupling assembly. The coupling assembly includes an intermediate coupling plate (38) stationed between the driven (32) and driving (12) shafts. A driven lug (34) associated with the driven shaft (32) has tapered contact faces (36) and engages a driving slot (40) in the center of the coupling plate (38). Likewise, a pair of diametrically opposed half-lugs (18) associated with the driving shaft (12) engage in respective half slots (42) through a similar tapered interface. Springs (28) backing each of the half lugs (18) establish a continuous axial compression force within the coupling plate (38) to urge seating of the tapered interfaces but without frustrating transverse sliding in the respective slots (40, 42), thereby taking up lash from the system. The lugs (18, 34) are oriented perpendicular relative to each other, so as to simulate a traditional Oldham-style coupling.

Abstract: A method adjusts a torque differential between firing cylinders based on engine speed such that greater torque differentials are provided at higher engine speeds. Further, the torque differential may be adjusted based on the firing pattern of the cylinders.

Abstract: Systems and methods for managing camshaft dynamic loads associated with actuation of a camshaft-driven auxiliary device in a multiple-cylinder internal combustion engine apply positive and negative torque to the camshaft in a phased relationship relative to actuation of the auxiliary device and optionally relative to actuation of intake or exhaust valves operated by the camshaft.

Abstract: A device for selectively changing phase relationship between first and second rotating shafts in an internal combustion engine where the first shaft is secured for rotation with a worm carrier assembly and the second shaft is secured for rotation with a worm gear includes first and second worms disposed for rotation within the worm carrier assembly and having torsional preloads with opposite hands of rotation and meshing with the worm gear. An actuator turns the first and second worms in a first direction to advance rotation of the second shaft relative to the first shaft and turns the first and second worms in a second direction to retard rotation of the second shaft relative to the first shaft.

Abstract: An internal combustion engine having two cylinder banks and adjustable camshaft timing is disclosed in which the camshafts in one cylinder bank are adjusted so that there is no net flow from the cylinders to effectively disable the cylinder bank. In particular, exhaust valve timing is advanced so that the maximum valve lift occurs approximately at bottom center between expansion and exhaust strokes and intake valve timing is advanced so that maximum valve lift occurs approximately at bottom center between intake and compression strokes. Also disclosed is an engine in which an intake and an exhaust camshaft on a single bank are coaxial with valve timings adjusted by rotating the inner of the two camshafts with respect to the outer of the two camshafts.

Abstract: An Oldham-style coupling assembly wherein a driving shaft (12) is rotatably coupled to a driven shaft (32) using a reduced-lash flexible coupling assembly. The coupling assembly includes an intermediate coupling plate (38) stationed between the driven (32) and driving (12) shafts. A driven lug (34) associated with the driven shaft (32) has tapered contact faces (36) and engages a driving slot (40) in the center of the coupling plate (38). Likewise, a pair of diametrically opposed half-lugs (18) associated with the driving shaft (12) engage in respective half slots (42) through a similar tapered interface. Springs (28) backing each of the half lugs (18) establish a continuous axial compression force within the coupling plate (38) to urge seating of the tapered interfaces but without frustrating transverse sliding in the respective slots (40, 42), thereby taking up lash from the system. The lugs (18, 34) are oriented perpendicular relative to each other, so as to simulate a traditional Oldham-style coupling.

Abstract: A video display system including an electronic sign, a electronic sign control system utilizing a general purpose personal computer, having a video interface card, controlled by clock and command signals from said personal computer, containing a plurality of video and digital input ports and a high speed output port, a transmitter link control card, also under the control of clock and command signals from said personal computer, for transmitting video display, clock, and command signals to a remote data receiver and distributor associated with the electronic sign, which converts said signals into device control signals for controlling individual sign display elements.

Abstract: A dual crankshaft internal combustion engine is symmetrically constructed to form a perfectly balanced engine assembly. A first crankshaft, having a first end, a second end, and being formed of a shape and with a torsional flexibility, is housed within a cylinder block and connected to a first series of cooperating pistons and cylinders. A second crankshaft, having a first end and a second end, is formed of substantially the same shape as the first crankshaft and has substantially the same torsional flexibility as the first crankshaft. The second crankshaft is also housed within the cylinder block and connected to a second series of cooperating pistons and cylinders, while being positioned parallel to the first crankshaft, with the first end of the first crankshaft being positioned adjacent to the second end of the second crankshaft.