Abstract: An air induction system includes a duct that defines a passage for airflow to the engine. The duct is substantially clear of obstructions to improve airflow that in turn provides improved engine performance. A speaker generates sounds to provide a desirable engine sound. A controller drives the speaker to generate desired tones and sounds responsive to engine operation. The sounds generated by the speaker enhance, improve and provide desirable and proportional acoustic performance more reflective of the improved engine performance provided by the improved airflow.

Abstract: A vehicle air supply noise attenuation system utilizes both active and passive methods of noise attenuation. A helmholtz resonator communicates with an air supply duct, and is designed to attenuate a narrow band of noise. An active noise control system, including a speaker and an electronic controller, is mounted within the resonator volume and attenuates noise over a wider band of frequencies. The combination of the active and passive noise control attenuates noise over a wide band of frequencies without requiring an overly large speaker.

Abstract: An intake manifold is molded of two plastic parts. A first main manifold body provides the outer cover and an inner opening. A second runner provides a plurality of entry ports for communicating air to cylinders within the engine. In the past, it has been somewhat difficult to control the shape of the entry ports when the manifold was molded of a single part. The use of the separate runner allows the provision of a relatively thin and easily molded part such that the entry ports can be closely controlled and an idealized design can be achieved.

Abstract: An intake manifold for an engine is provided that includes a housing having a passageway carrying blow-by gases from an engine crankcase. A valve body housing having a cavity is defined by a portion of the housing. The valve body housing has a vacuum side and a blow-by gas side. The blow-by gas side is in fluid communication with the passageway. A positive crankcase ventilation valve is disposed within the cavity and permits the blow-by gases to flow from the passageway through to the vacuum side when in an open position. A cap is preferably secured to the housing for sealing the positive crankcase ventilation valve within the cavity. Preferably an oil separator is also integrated into the intake manifold to separate the oil from the blow-by gases.

Abstract: An intake manifold for an engine is provided that includes a housing having a passageway carrying blow-by gases from an engine crankcase. A valve body housing having a cavity is defined by a portion of the housing. The valve body housing has a vacuum side and a blow-by gas side. The blow-by gas side is in fluid communication with the passageway. A positive crankcase ventilation valve is disposed within the cavity and permits the blow-by gases to flow from the passageway through to the vacuum side when in an open position. A cap is preferably secured to the housing for sealing the positive crankcase ventilation valve within the cavity. Preferably an oil separator is also integrated into the intake manifold to separate the oil from the blow-by gases.

Abstract: An intake manifold includes an upper shell, a lower shell, and a middle shell that interconnects the upper and lower shells. The lower shell has a plurality of longitudinally spaced shell ports. Each shell port is adapted for installation over a corresponding intake port for an engine cylinder head. The upper shell has a plurality of runners that are used to guide air to the shell ports. The middle shell has a plurality of channels that interconnect the runners and the shell ports such that air can flow through the runner to the cylinder intake port. Fuel injector pockets are formed within the upper, middle, and lower shells with each of the pockets having an injector opening in communication with the corresponding shell port. An internal fuel rail, formed between the upper and middle shells, supplies fuel to each of the injector pockets. A fuel injector is installed into each injector pocket such that the injectors are substantially enclosed within the manifold.

Abstract: An intake manifold for an engine is provided that includes a housing having a passageway carrying blow-by gases from an engine crankcase. A valve body housing having a cavity is defined by a portion of the housing. The valve body housing has a vacuum side and a blow-by gas side. The blow-by gas side is in fluid communication with the passageway. A positive crankcase ventilation valve is disposed within the cavity and permits the blow-by gases to flow from the passageway through to the vacuum side when in an open position. A cap is preferably secured to the housing for sealing the positive crankcase ventilation valve within the cavity. Preferably an oil separator is also integrated into the intake manifold to separate the oil from the blow-by gases.