Abstract:
An intake manifold includes a plenum volume 14 mounted for movement within a housing 20 in response to a drive system 22 to define an effective runner length. A multiple of deformable runner passages 18 include a flexible section 26 such that as the plenum 14 extends and retracts within the housing 20, the flexible section 26 accommodates the difference in length while the housing 20 provides structural support therefor. An intake conduit 12 likewise includes a flexible section 26 to accommodate movement of the plenum 14. In operation at low engine speeds, the plenum 14 is driven to extend the deformable runner passages 18 to increase the length between the plenum 14 and the engine cylinders 16. As the engine speed increases, the plenum 14 is driven to shorten the deformable runner 18 for maximum speed operation.
Abstract:
An intake manifold assembly (10) includes a plenum volume (14) and a variable volume assembly (20). The variable volume assembly (20) includes a deformable member (22) and a resilient member (24). The resilient member (24) positions the deformable member (22) at a predetermined position in response to a vacuum pressure within the plenum (14) to define a volume within the deformable member (22) to change the operational characteristics of the intake manifold assembly (10).
Abstract:
A choke 20 is provided for suppressing radio-frequency interference of a brush-type motor. The choke includes a single wire having a portion wound about a coil axis A to define a plurality of coils 24 including two outermost coils 26 and 28. An attaching structure 30 extends from one of the outermost coils and includes a loop structure 42. The loop structure is constructed and arranged to be inserted into a slot 58 in a brush card 48 and moved into hooked relation with a retaining member 60 of the brush card that is associated with the slot so as secure the choke to the brush card. At least a portion of the attaching structure is constructed and arranged to be in electrical connection with a brush 56 of a motor when the choke is secured to the brush card. An elongated end portion 44 of the choke extends directly from the other of the outermost coils. The elongated end portion is constructed and arranged to be directly electrically connected to an electrical connector 54 when the choke is secured to the brush card.
Abstract:
A vehicle component assembly (20) has a component body (22) that includes a first portion (30) and a second portion (32). A selected section (26) of a wire harness (24) is secured into the component body (22) using an adhesive (28). In one example, the adhesive (28) surrounds the conductor (25) of the wire harness (24). The adhesive (28) secures the component body portions (30) and (32) together.
Abstract:
An active noise control system (100) increases system stability by modifying a spectral shaping path (112) to prevent unbounded growth in the system error. In one embodiment, a model of the physical path (114) within the spectral shaping path (112) is given a positive bias, encouraging the model to overestimate the actual characteristics of the physical path (114). In another embodiment, the gain in the spectral shaping path (112) is normalized so that the gain decreases as the system output increases, placing an upper bound on the output signal. By modifying the model or the gain in the spectral shaping path (112), the invention improves system stability by limiting the destabilizing effects of modeling errors on the system.
Abstract:
An active noise control system (20) includes a controller (26) that drives a speaker (28) to cancel out or reduce noise. A microphone (30) provides information to the controller (26) regarding the system response to the noise source sound and the cancellation signal. The controller (26) uses a selected noise source sound as a calibration reference. By subsequently comparing the system response to the same sound, the controller (26) is able to calibrate the system and make any adjustments necessary to account for microphone drift, for example.
Abstract:
An engine noise control system (100) controls engine noise in multiple engine operating modes by controlling a size of an air inlet (104) with a movable valve. An actuator (114) moves the valve (112) between an open position and a closed position depending on the engine operating mode, to control the amount of air travelling into an air cleaner. The actuator (114) is coupled to an engine cylinder de-activation unit (200) to link the valve operation to the engine operating mode. When the engine is operating in a low-power mode, which requires less air, the actuator (114) moves a cable drive (204), which rotates an actuation lever (208) that turns the valve (112) into a closed position. When the engine is operating in a high-power mode, the actuator (114) moves the cable drive (204) to move the valve (112) to an open position. Reducing the effective cross sectional area of the air inlet increases a ratio between the air cleaner (102) area and the duct area, increasing the attenuation characteristics of the system.
Abstract:
An active noise control system includes a speaker located within an enclosure within a vehicle body component. The speaker enclosure is typically located forward of a vehicle wheel well. An elongated transmission member communicates canceling noise from the speaker enclosure over the wheel well to an outlet adjacent the firewall. The elongated transmission member focuses and directs cancellation noise toward the firewall and bypasses the wheel well and any restriction created thereby.
Abstract:
A canister purge valve, and an emission control system, for regulating a fuel vapor flow between a fuel vapor collection canister and an intake manifold of an intake manifold of an internal combustion engine. The canister purge valve includes a body having a passage extending between a first port and a second port, a seat defining a portion of the passage, a member movable with respect to the seat, and an actuator that moves the member. The first port of the body is adapted to be in fluid communication with the fuel vapor collection canister, and the second port of the body is adapted to be in fluid communication with the intake manifold of the internal combustion engine. The member moves generally along an axis between a first configuration that prohibits fuel vapor flow through the seat and a second configuration that permits fuel vapor flow through the seat. And the actuator includes a piezo-electric element that moves the member from the first configuration to the second configuration.
Abstract:
An exhaust gas flow management assembly for an exhaust gas recirculation system including an intake conduit, an exhaust conduit in fluid communication with the intake conduit, and a closing member. The intake conduit includes an inner surface defining a fluid passageway and a recirculation opening in the inner surface. The closing member is movably mounted in the fluid passageway and has a first position where the closing member blocks fluid communication between the intake conduit and the exhaust conduit, and a second position where the closing member extends into the fluid passageway of the intake conduit at an angle relative to a plane including the recirculation opening and opens fluid communication between the intake conduit and the exhaust conduit. When fluid is flowing through the intake conduit and the exhaust conduit, a change in an amount of fluid flowing from the exhaust conduit into the intake conduit is less than 5% of a total amount of fluid flowing in the intake conduit when the angle is less than 10 degrees.