| 摘要 |
An air-assisted fuel injection system for an engine includes an air compressor to be driven by the engine and having an air inlet and an air outlet connected with air-assisted fuel injectors for the engine. An air pressure regulator is also connected with the compressor outlet for controlling air pressure by exhausting excess air delivered by the compressor to the outlet. A throttle valve in the compressor inlet is operated by a controller to variably restrict inlet air flow to the compressor. An air flow sensor, responsive to an indicator of the flow of excess air exhausted by the air pressure regulator, is connected with the controller for variably closing the throttle in response to increasing excess air flow, thereby reducing the amount of excess air delivered by the compressor and limiting parasitic losses from pumping of excess air by the compressor.
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