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Method and system for controlled exhaust gas recirculation in an internal combustion engine with application to retarding and powering function

Mark A. Israel
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TLDR
In this paper, the overlap between an exhaust gas recirculation (34) event and an intake valve (32) event is controlled to optimize engine braking at various engine operating speeds.
Abstract: 
In an internal combustion engine (20) braking system which may provide compression release braking and/or exhaust braking, methods and systems are disclosed of controlling the overlap between an exhaust gas recirculation (34) event and an intake valve (32) event to optimize engine braking at various engine operating speeds (900). Optimization may be achieved by selectively advancing and retarding the opening and closing of an exhaust valve (32) for exhaust gas recirculation. The opening and closing of the exhaust valve may be carried out responsive to the monitored levels (600) of such engine parameters as: exhaust manifold pressure (610), exhaust manifold temperature (610), cylinder pressure (610), and/or cylinder temperature (610). Various engine parameters may be monitored (900). Control of exhaust gas recirculation may be responsive thereto, such that a monitored parameter (900) does not exceed a predetermined level.

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TL;DR: In this article, a turbo-charged internal combustion cylinder assembly includes a combustion chamber which may be communicably connected to a compressor via an intake port through an intake manifold and aftercooler so the compressor may provide pre-combustion gases to the combustion chamber when the intake valve is open.
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References
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Patent

Valve control system for internal combustion engine

Hideo Kawamura
TL;DR: A control system for controlling intake and exhaust valves of an internal combustion engine includes an electro-magnetic actuator means for electromagnetically operating the intake/exhaust valves as discussed by the authors.
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Method of controlling reciprocating four-stroke internal combustion engines

Franz Pischinger, +1 more
TL;DR: In this article, a method for unthrottled load control of an internal combustion engine by means of exhaust gas is presented. But this method requires entirely freely adjustable opening and closing times for the inlet and exhaust valves.
Patent

Method and apparatus to accomplish exhaust air recirculation during engine braking and/or exhaust gas recirculation during positive power operation of an internal combustion engine

Zdenek S. Meistrick, +1 more
TL;DR: In this paper, a method and apparatus for carrying out variable timing exhaust gas recirculation is disclosed for use during both positive power and retarding operation of an internal combustion engine.
Patent

Part load gas exchange strategy for an engine with variable lift camless valvetrain

Michael M. Schechter
TL;DR: A variable engine valve control system and method of operation thereof wherein each of the reciprocating engine valves is hydraulically or electrically controlled and can vary its lift schedule for various engine operating conditions is discussed in this paper.
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Electronic controls for compression release engine brakes

Haoran Hu, +1 more
TL;DR: In this paper, the authors proposed an electronic control for compression release engine brakes of the type having electrically controlled valves for selectively applying high pressure hydraulic fluid to hydraulic actuators which open exhaust valves in the associated internal combustion engine to produce compression release events in the engine.