Method of regulating and controlling an internal combustion engine
AssigneeNew Holland North America, Inc.
InventorGiorgio Bordini
Life of this patent
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Abstract
A method of regulating and controlling an internal combustion engine forming part of a hybrid power unit of a self-propelled vehicle, the method employing a first graph showing the power transmitted by the engine as a function of the rotation speed of a drive shaft, and for different injector openings of a power-regulating injection device; and a second graph showing the torque transmitted by the drive shaft as a function of the rotation speed of the drive shaft, and for different injector openings of the power-regulating injection device; the second graph also showing the injector opening of the power-regulating injection device.
Claims4
A method of regulating and controlling an internal combustion engine forming part of a hybrid power unit of a self-propelled vehicle comprising the steps of:
- dividing the y-axis of a first graph, showing the power transmitted by the engine as a function of the rotation speed of a drive shaft, and for different injector openings of a power-regulating injection device, arbitrarily into a number of ranges not necessarily of the same size;
- inserting on the y-axis of said first graph the power value required to operate the self-propelled vehicle, so as to single out a particular range corresponding to said power value;
- locating on the first graph the maximum power value in the range singled out in said inserting step and located on a curve corresponding to the maximum injector opening of an injection pump;
- determining on the first graph the rotation speed of the drive shaft corresponding to the maximum power value located at said locating step;
- transferring the rotation speed determined at step to a second graph, showing the torque transmitted by the drive shaft as a function of the rotation speed of the drive shaft, and for different injector openings of the power-regulating injection device, to locate the corresponding torque value, said value being located at the point of intersection between the maximum injector opening torque curve and a vertical line through said rotation speed;
- locating on the second graph the partial-torque and relative injector opening curve through the point corresponding to the rotation speed and torque value determined at said determining and transferring steps;
- tracing on the second graph the partial-torque curve corresponding to said torque value up to the intersection with the x-axis to determine the idling speed of the engine at the given injector opening;
- and
- ascertaining experimentally the position of an external actuator for regulating an injection pump forming part of said power-regulating injection device, so that said pump is regulated to inject fuel into the engine according to the injector opening determined at said locating step.
Dependencies are inferred from the claim text.