Multiple tap aspirator with leak passage
First Claim
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1. A method for an engine, comprising:
- selectably recirculating intake air from downstream of a compressor to upstream of the compressor through a bypass passage and an aspirator arrangement arranged in parallel with the bypass passage, the aspirator arrangement comprising a suction tap at a throat of an aspirator fluidly coupled via a leak passage with a suction tap at a diffuser of the aspirator, an exit of the suction tap at the diffuser narrowing as it approaches the diffuser, wherein the selectably recirculating intake air is based on a desired level of vacuum generation and a desired level of compressor recirculation flow.
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Abstract
Systems and methods are provided for engine systems including a multiple tap aspirator with a throat tap and a diffuser tap. Suction passages coupled to the throat and diffuser taps, respectively, may fluidly communicate via a leak passage with a flow restriction. During conditions where the pressure at a suction flow source of the diffuser tap is less than the pressure at the diffuser tap, backflow from the diffuser tap may travel through the leak passage into the throat tap.
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Citations
6 Claims
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1. A method for an engine, comprising:
selectably recirculating intake air from downstream of a compressor to upstream of the compressor through a bypass passage and an aspirator arrangement arranged in parallel with the bypass passage, the aspirator arrangement comprising a suction tap at a throat of an aspirator fluidly coupled via a leak passage with a suction tap at a diffuser of the aspirator, an exit of the suction tap at the diffuser narrowing as it approaches the diffuser, wherein the selectably recirculating intake air is based on a desired level of vacuum generation and a desired level of compressor recirculation flow. - View Dependent Claims (2, 3, 4, 5, 6)
Specification