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Equipment and method for controlling air system of diesel engine

A diesel engine and air system technology, applied in mechanical equipment, engine components, engine control, etc., can solve problems such as unfavorable transient condition control and inability to satisfy diesel engine steady-state and transient condition performance at the same time. , to achieve the effect of easy implementation, improved control, and consideration of coupling

Active Publication Date: 2013-02-13
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The state observer will introduce time delay and error, which is unfavorable for the control of transient conditions
[0015] To sum up, the control strategies for the diesel engine air system in the prior art cannot well meet the requirements of the diesel engine's actual steady-state and transient operating conditions, emissions and calibration of the diesel engine control unit (ECU) at the same time.

Method used

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  • Equipment and method for controlling air system of diesel engine
  • Equipment and method for controlling air system of diesel engine
  • Equipment and method for controlling air system of diesel engine

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Embodiment Construction

[0040] The principle and spirit of the present invention will be described below with reference to several exemplary embodiments. It should be understood that these embodiments are given only to enable those skilled in the art to better understand and implement the present invention, rather than to limit the scope of the present invention in any way.

[0041] According to an embodiment of the invention, a device and a method for controlling an air system of a diesel engine are presented. It should be noted that the term "air system" used herein includes at least an exhaust gas recirculation EGR system and a turbocharging system.

[0042] It should also be noted that specific turbocharging systems, such as variable geometry turbocharging (VGT), are mentioned herein for illustration and demonstration purposes only. Embodiments of the present invention are equally applicable to any turbocharging system now known or developed in the future that operates on engine exhaust. The sc...

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Abstract

The embodiment of the invention relates to equipment and method for controlling an air system of a diesel engine. Particularly, a physical model for representing the air system of the diesel engine is established according to the embodiment of the invention. A turbine pressurization system and a waste gas recycling system are controlled by using the physical model, so that the actual working condition of the air system of the diesel engine approximates to a desired target working condition as much as possible. The embodiment of the invention discloses the corresponding equipment, the diesel engine and the method.

Description

technical field [0001] Embodiments of the present invention relate generally to diesel engines and, more particularly, to apparatus and methods for controlling an air system of a diesel engine. Background technique [0002] With the continuous development of engine theory and technology, exhaust gas recirculation (EGR) system has become an important part of diesel engine. Exhaust gas from diesel engines usually contains a large amount of nitrogen oxides (NOx), which is a major source of air pollution. With the EGR system, a portion of the exhaust gas produced by the diesel engine is sent back to the cylinders. Due to the inertness of the recirculated exhaust gas, it will retard the combustion process and slow down the combustion rate, which in turn leads to a slowdown of the pressure build-up process in the combustion chamber, thereby effectively reducing nitrogen oxides. In addition, increasing the exhaust gas recirculation rate reduces the overall air flow, so the overal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D43/00F02M25/07F02B37/00F02M26/05
CPCY02T10/121Y02T10/144Y02T10/12
Inventor 胡广地孙少军佟德辉张晓琳
Owner WEICHAI POWER CO LTD