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Method of operating a diesel engine and diesel engine apparatus having multiple operating modes

A diesel engine, the technology of engine operation, applied in the direction of mechanical equipment, engine components, combustion engines, etc.

Active Publication Date: 2018-02-16
MACK TRUCKS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present inventors have recognized that essentially no one has considered the relative importance of operation of one set of base actuator control set points that meets emissions requirements versus another set of base actuator control set points that also meets emissions requirements. fuel economy

Method used

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  • Method of operating a diesel engine and diesel engine apparatus having multiple operating modes
  • Method of operating a diesel engine and diesel engine apparatus having multiple operating modes
  • Method of operating a diesel engine and diesel engine apparatus having multiple operating modes

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Embodiment Construction

[0012] figure 1 A diesel engine arrangement 21 according to one aspect of the invention is shown. The diesel engine system 21 includes a diesel engine 23 having an exhaust gas aftertreatment system (EATS) 25 . The NOx sensor 27 is arranged to sense the NOx level leaving the EATS 25 . The diesel engine apparatus 21 is particularly useful when used in conjunction with a vehicle such as a truck, however it can also be used in a variety of other applications.

[0013] The diesel engine installation 21 can include a compressor 29 upstream of the engine 23, which typically compresses ambient air. The compressor 29 can be associated with a turbine 31 which is part of a turbocharger 33 . The engine arrangement 21 can also include: a charge air cooler (CAC) 35 upstream of the engine but downstream of the compressor; a throttle valve 37 upstream of the engine but downstream of the charge air cooler; cylinder intake valve 39; cylinder exhaust valve 41, fuel injection valve 43; fuel p...

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Abstract

A method of operating a diesel engine having an exhaust aftertreatment system (EATS) comprising one or more devices for controlling exhaust NOx levels, the engine comprising a plurality of systems and components, the system and At least some of the components are adapted to be set to one or more control set points for one or more base actuators of the engine. The method includes: establishing a plurality of engine operating modes, each operating mode distinct from any other operating mode for at least one control set point; and for each operating mode, mapping fuel economy to NOx levels leaving EATS .

Description

technical field [0001] The present invention generally relates to a method of operating a diesel engine and a diesel engine arrangement, and more particularly to such a method and a diesel engine arrangement having multiple operating modes. Background technique [0002] Diesel engines often operate in multiple discrete operating modes that differ from each other for one or more different set points of the underlying engine actuators. For example, in one operating mode, the engine arrangement including the EGR line may have a setpoint in which the EGR valve is opened, while in another operating mode the EGR valve may be closed. [0003] Some engines are controlled such that each of the different base actuators is set in a specific way for different operating modes. For example, one setting of the base actuator may result in a "fuel economy mode" whose purpose is to save fuel regardless of, for example, NOx levels output from engine equipment. Another setting of the base act...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01N3/00
CPCF01N3/0842F01N3/2066F01N3/208F01N9/00F01N3/0253F01N2560/026F01N2610/02F01N2900/0412F01N2900/08F02M26/00F01N3/20F02D41/30Y02T10/12Y02T10/40
Inventor 帕特里克·贝里希思·莫里斯约翰·达尔
Owner MACK TRUCKS
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