Experimental Control of Variable Cam Timing Actuators

Chauvin, Jonathan; Petit, Nicolas

doi:10.3182/20070820-3-us-2918.00015

Cited by 3 publications

(2 citation statements)

References 13 publications

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“…The variable settings of camshaft phases change filling parameters of an engine cylinder, which adapt to time-varying loads (Jankovic and Magner, 2002). As a result, depending on the engine design and the number (1, 2 or 4) of mounted valve timing control mechanisms, it is possible to reduce fuel consumption and exhaust emissions (HC and NOx), as well as to increase the engine's power and torque (Chauvin and Petit, 2007;Gray, 1988;Stein et al, 1995).…”

Section: Introductionmentioning

confidence: 99%

Measurement and Evaluation of Functional and Operational Coefficients of Hydraulic Solenoid Valve Prototypes Used for Variable Valve Timing Control in Combustion Engines

Kalinowski

Kamiński

2021

Acta Mechanica Et Automatica

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This paper describes the engineering structure and functions of a typical solenoid valve used in hydraulic mechanisms that are based on variable camshaft timing (VCT). The main operating parameters and functional utility coefficients of hydraulic solenoid valves have been defined. Tests of 10 reference and 10 prototype valves were run on a test stand for a comparative assessment of both engineering concepts based on Welch and Mann–Whitney statistical tests of the mean values of designated coefficients. The studies identified differences between both designs, and the obtained research material was used as an input to improve the performance of the engineered concept. To perform a final evaluation of the effects that arise as a result of changes introduced to some functional–operational coefficients, additional tests are required to be run on an engine testbed. The applied test methodology may then be used for control and verification tests of the valves, which can further be used in VCT technology.

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Section: Introductionmentioning

confidence: 99%

Measurement and Evaluation of Functional and Operational Coefficients of Hydraulic Solenoid Valve Prototypes Used for Variable Valve Timing Control in Combustion Engines

Kalinowski

Kamiński

2021

Acta Mechanica Et Automatica

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“…Some intake manifold BGR controllers are given in Jankovic and Kolmanovsky (1998), Van Nieuwstadt et al (2000) or Chauvin et al (2008). Some VVA actuators controllers can be found in Chauvin and Petit (2007) or Genç et al (2001). …”

Section: Existing Controllersmentioning

confidence: 99%

Transient Burned Gas Rate Control on VVA equipped Diesel Engines

Leroy

Chauvin

Petit

2010

IFAC Proceedings Volumes

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This paper addresses the problem of cylinder burned gas rate transient control of VVA equipped Diesel engines. This problem is of importance for NO x emissions reduction. The proposed strategy coordinates existing low-level intake manifold burned gas rate and VVA controllers. To determine relevant control actions, a model of cylinder filling phenomenon is determined. It expresses, under the form of a discrete event dynamics, the behavior of the cylinder burned gas rate at intake valve closure. Interestingly, the model is invertible, thanks to its analytical nature. This property directly suggests an inverse formula that serves as control law. The strategy is efficient as is highlighted by experimental results obtained on a 1.6 L Diesel engine test bench. As a result, NO x emissions are largely diminished during transients.

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