Method and apparatus for parasitic load compensation
First Claim
16. A work machine or other vehicle comprising:
- an engine having variable output power and operable to provide power to at least two power-operated components, at least one of said power-operated components being a parasitic load component;
a control system operable to control operation of at least a portion of the work machine or other vehicle in response to the power requirements of said at least two power-operated components, said control system including an electronic controller coupled to said engine and at least one sensor coupled to said electronic controller and operable to provide a signal indicative of at least one operating parameter of said engine;
said controller having memory associated therewith and having information stored therein correlating said at least one engine operating parameter to the total power output of said engine at a plurality of engine speeds and having additional information stored therein correlating the operation of said at least one parasitic load component to the power required for such operation at a plurality of engine speeds;
said controller being operable to determine the net power output of said engine by determining the difference between the total output power of the engine and the power requirement associated with said at least one parasitic load component, and to output a signal representative thereof to control operation of at least a portion of the work machine.
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Accused Products
Abstract
A control system for determining the net power output of an engine associated with a work machine or other vehicle wherein parasitic loads encountered during engine operation are taken into account, the control system including an electronic controller coupled to the engine, at least one sensor coupled to the controller for inputting at least one signal representative of certain operating parameters associated with the engine, and at least one other sensor coupled to the controller for inputting at least one signal representative of the operation of any parasitic load encountered during engine operation, the controller being operable to determine the total output power of the engine and the power requirements associated with any parasitic load based upon the sensor signals. The controller is also operable to output a signal representative of the difference between the total output power of the engine and the power requirements associated with any parasitic loads encountered during engine operation, the outputted signal being used for controlling the operation of the engine or other peripheral equipment or systems associated with the work machine or other vehicle.
56 Citations
43 Claims
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16. A work machine or other vehicle comprising:
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an engine having variable output power and operable to provide power to at least two power-operated components, at least one of said power-operated components being a parasitic load component;
a control system operable to control operation of at least a portion of the work machine or other vehicle in response to the power requirements of said at least two power-operated components, said control system including an electronic controller coupled to said engine and at least one sensor coupled to said electronic controller and operable to provide a signal indicative of at least one operating parameter of said engine;
said controller having memory associated therewith and having information stored therein correlating said at least one engine operating parameter to the total power output of said engine at a plurality of engine speeds and having additional information stored therein correlating the operation of said at least one parasitic load component to the power required for such operation at a plurality of engine speeds;
said controller being operable to determine the net power output of said engine by determining the difference between the total output power of the engine and the power requirement associated with said at least one parasitic load component, and to output a signal representative thereof to control operation of at least a portion of the work machine. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A method of operating a power-operated work machine having a variable power output engine operable to drive a plurality of power-operated components at least one of which being a parasitic load component, the work machine having an electronic controller operably connected to the engine and operable to control operation of at least a portion of the work machine, said method comprising:
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generating a first signal indicative of the total power output of the engine;
generating a second signal indicative of the power requirement of the at least one parasitic load component;
generating a third signal indicative of the difference between the total power output of the engine and the at least one parasitic load component power requirement; and
utilizing the third signal for controlling operation of at least a portion of the work machine. - View Dependent Claims (27, 28)
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29. A method for determining the net power output of an engine associated with a work machine or other vehicle wherein the work machine or other vehicle includes an engine operable to provide power to at least two power-operated components, at least one of the power-operated components being a parasitic load component, the method comprising the steps of:
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providing an electronic controller coupled to the engine;
sensing at least one engine parameter representative of the operating condition of the engine;
determining the total output power of the engine based upon said at least one sensed engine parameter;
sensing whether said at least one parasitic load component is in operation during operation of the engine;
determining the power requirement associated with the at least one parasitic load component when said component is in operation;
determining the difference between the total output power of the engine and the power requirement associated with the at least one parasitic load component; and
outputting a signal representative of the difference between the total output power of the engine and the power requirement associated with the at least one parasitic load component. - View Dependent Claims (30)
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31. A method of calculating parasitic load requirements associated with an engine installed in an on-highway truck, said method comprising:
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determining engine speed;
determining load on the engine;
determining whether the engine speed is within a tolerance of a predetermined value;
determining the fuel command in response to the engine speed being with a tolerance of said predetermined value and the load being less than a predetermined load value; and
comparing the fuel command to a no load fuel command stored in memory. - View Dependent Claims (1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 32, 33, 34)
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34-1. The method of claim 32, wherein said parasitic load is used to modify subsequent fuel delivery commands.
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35. An internal combustion engine, installed in a vehicle, comprising:
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an electronic controller;
a fuel system operatively connected with said electronic controller and introducing fuel into cylinders of said internal combustion engine in response to fuel delivery command signals produced by said electronic controller;
an engine speed sensor operatively connected with said electronic controller;
at least one vehicle parameter sensor;
wherein said electronic controller determines that said engine is running in a no load condition at least in response to a signal from said vehicle parameter sensor, and responsively stores a value representative of fuel delivered to the engine cylinders and a value representative of engine speed. - View Dependent Claims (36, 37, 38, 39, 40, 41)
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42. A method for controlling an internal combustion engine, comprising:
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determining a no load fuel command at a predetermined engine speed when said engine is operating under no load condition;
using said no load fuel command to develop fuel delivery signals when said engine is operating under a load. - View Dependent Claims (43)
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Specification