Engine throttle position sensor calibration
First Claim
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1. A method for calibrating an engine throttle position sensor during operation of a refrigeration system powered by a fuel fired engine, comprising:
- monitoring, at a refrigeration unit controller, a current sensed engine operating RPM and a current sensed engine throttle position signal;
the refrigeration unit controller gradually increasing a load imposed by the refrigeration system on the fuel-fired engine;
the refrigeration unit controller determining when the current engine operating RPM has drooped to a preset RPM calibration limit;
the refrigeration unit controller defining the current sensed engine throttle position signal sensed coincident with the sensed engine operating RPM when the engine operating RPM has drooped to the preset RPM calibration limit as a recalibrated engine throttle position signal indicative of an engine throttle position of 100%; and
applying the recalibrated engine throttle position signal indicative of an engine throttle position of 100%.
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Abstract
A method is provided for calibrating an engine throttle position sensor operation of a refrigeration system powered by a fuel fired engine.
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Citations
15 Claims
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1. A method for calibrating an engine throttle position sensor during operation of a refrigeration system powered by a fuel fired engine, comprising:
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monitoring, at a refrigeration unit controller, a current sensed engine operating RPM and a current sensed engine throttle position signal; the refrigeration unit controller gradually increasing a load imposed by the refrigeration system on the fuel-fired engine; the refrigeration unit controller determining when the current engine operating RPM has drooped to a preset RPM calibration limit; the refrigeration unit controller defining the current sensed engine throttle position signal sensed coincident with the sensed engine operating RPM when the engine operating RPM has drooped to the preset RPM calibration limit as a recalibrated engine throttle position signal indicative of an engine throttle position of 100%; and applying the recalibrated engine throttle position signal indicative of an engine throttle position of 100%. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system comprising:
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a fuel-fired engine including an engine throttle position sensor for measuring or sensing an operating position of the engine throttle; and a controller for calibrating the engine throttle position sensor during operation of the system, the controller configured to; monitoring a current sensed engine operating RPM and a current sensed engine throttle position signal; gradually increasing a load imposed on the fuel-fired engine; determining when the current engine operating RPM has dropped to a preset RPM calibration limit; defining the current sensed engine throttle position signal sensed coincident with the sensed engine operating RPM when the engine operating RPM has drooped to the preset RPM calibration limit as a recalibrated engine throttle position signal indicative of an engine throttle position of 100%; and applying the recalibrated engine throttle position signal indicative of an engine throttle position of 100%. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification