Electronic engine control and method
AssigneeCaterpillar Inc.
InventorsThomas A. Mccauley, Marvin K. Palmer, Bryan A. Vogt
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Abstract
An electronic engine control is provided that compensates the engine's power output capability based on the parasitic power load demands.
Claims21
A system for controlling fuel delivery to a compression ignition engine, said engine controllably providing power output to at least one of a transmission and a work implement system, said engine powering at least one other device, said apparatus comprising:
- an electronic control module connected with said other device and at least one of said transmission and work implement system;
- a fuel injection device connected with said electronic control module;
- said electronic control module using a first fuel delivery limit in response to said device having a first power requirement;
- and
- said electronic control module using a second fuel delivery limit in response to said device having a second power requirement.
An apparatus, comprising:
- a compression ignition engine producing output power;
- a parasitic load connected with the compression ignition engine, said parasitic load using at least a part of said output power of said engine;
- wherein the maximum power output of said compression ignition engine can be varied depending at least in part on the power output used by said parasitic load.
The apparatus according to claim 7, wherein said parasitic load includes an engine cooling fan.
A method for varying the power output of an electronically controlled compression ignition engine, said engine including an electronic control module having a memory device with fuel delivery limit maps stored therein, a fuel system connected with said electronic control module, and a parasitic load device connected with said electronic control module, said method comprising:
- determining the amount of engine power demanded by said parasitic load device;
- limiting fuel delivery as a function of a first fuel delivery limit in response to said parasitic load device demanding a first power level;
- and
- limiting fuel delivery as a function of a second fuel delivery limit in response to said parasitic load device demanding a second power level.
The method of claim 11, wherein said step of determining the engine power demanded by said parasitic load device includes determining a value of a parasitic load device command issued by said electronic controller.
The method of claim 12, wherein said parasitic load device includes an engine cooling fan.
The method according to claim 14, wherein said parasitic load device includes an engine cooling fan.
The method according to claim 15, wherein limiting fuel delivery as a function of said first and second fuel delivery limits includes interpolating a fuel delivery limit as a function of said first and second parasitic load power demands.
A method of controlling a compression ignition engine, said engine being capable of providing power to at least one of a transmission and a work implement system, and said engine being capable of providing power to a parasitic load device, said method comprising:
- determining whether said engine is providing power to said parasitic load device;
- increasing the power output capability of said engine as a function of whether said engine is providing power to said parasitic load device.
The method according to claim 17, wherein said parasitic load device includes an engine cooling fan.
Dependencies are inferred from the claim text.