Method and system for controlling a turbocharger compressor bypass
AssigneeFord Global Technologies, LLC
InventorsJoseph Norman Ulrey, Keith Michael Plagens, Henry W. Patterson
Life of this patent
Estimating the term…
Abstract
A turbocharger compressor bypass valve is disclosed. In one example, the compressor bypass valve operates inversely proportional to engine throttle operation. The approach may simplify compressor bypass valve control and reduced engine system complexity.
Claims16
A method for controlling surge of a turbocharger compressor, comprising:
- adjusting a position of an engine throttle valve in response to an engine torque request;
- and
- adjusting a position of a compressor bypass valve via a cam on a shaft of the engine throttle, where air is directed from an outlet of a compressor to an inlet of the compressor via the compressor bypass valve when flow through the compressor is less than a threshold level and when a pressure ratio across the compressor is greater than a threshold level.
A method for controlling surge of a turbocharger compressor, the turbocharger compressor coupled to an engine intake upstream of an electronically controlled engine throttle valve, comprising:
- adjusting a position of the engine throttle valve in response to an engine torque request;
- and
- adjusting a position of a compressor bypass poppet valve in mechanical communication with the engine throttle valve via a cam on a shaft of the throttle valve, where air is directed from an outlet of a compressor to an inlet of the compressor via the compressor bypass poppet valve when flow through the compressor is less than a threshold level and when a pressure ratio across the compressor is greater than a threshold level.
A system for controlling turbocharger compressor surge, comprising:
- a turbocharger coupled to an engine;
- an engine throttle valve responsive to an engine torque command;
- and
- a compressor bypass poppet valve mechanically coupled to the engine throttle valve positioned along an air flow path between an inlet and an outlet of a compressor of the turbocharger and opened via a cam actuated by a shaft of the throttle valve and returned via a spring.
Dependencies are inferred from the claim text.