Relevant bibliographies by topics / CVVL- Continuous Variable Valve Lift

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  1. Journal articles
  2. Book chapters
  3. Conference papers

Academic literature on the topic 'CVVL- Continuous Variable Valve Lift'

Author: Grafiati
Published: 3 June 2025
Last updated: 31 July 2025

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Journal articles on the topic "CVVL- Continuous Variable Valve Lift"

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Megha, A. Mohite* Santosh B. Trimbake Vinay B. Ugale. "FEA BASED NUMERICAL MODELLING OF CONTINUOUS VARIABLE VALVE LIFT MECHANISM FOR SINGLE CYLINDER SI ENGINE." Global Journal of Engineering Science and Research Management 4, no. 10 (2017): 88–97. https://doi.org/10.5281/zenodo.1034493.

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Recently Variable Valve Actuation (VVA) systems are being extensively used in internal combustion engine. In such mechanism, cams and valves are connected via intermediate lever, which allows different maximum valve lifts and duration using same cam profile. Recently, novel valve actuation mechanism like Continuous Variable Valve Lift (CVVL) is being explored to regulate engine output without conventional throttle valve and this reduces the pumping losses especially at part load in SI engines. CVVL mechanism with three elements consists of eccentric shaft, Intermediate lever and Rocker arm, wh
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Li, Qingyu, Jingping Liu, Jianqin Fu, Xianjie Zhou, and Cheng Liao. "Comparative study on the pumping losses between continuous variable valve lift (CVVL) engine and variable valve timing (VVT) engine." Applied Thermal Engineering 137 (June 2018): 710–20. http://dx.doi.org/10.1016/j.applthermaleng.2018.04.017.

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Xu, Yuliang, Jiadui Chen, and Zhenghong Liu. "Experimental Study on Hydraulic Pulsation Features of Intelligent Variable Valve System for Auto Energy Saving." Computational Intelligence and Neuroscience 2022 (May 18, 2022): 1–9. http://dx.doi.org/10.1155/2022/5679520.

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The electrohydraulic valve system can realize continuous variable valve timing and lift using the flexibility of liquid. However, the existing electrohydraulic valve systems usually rely on a high-speed solenoid valve to control the on and off states of the hydraulic circuit, which pushes up the system cost. This paper introduces a continuous hydraulic variable valve timing and lift system with adjustable volume (CVVTL). Unlike the other electrohydraulic valve systems, the CVVTL does not need a high-frequency servo valve to control each valve but adjusts the valve timing and lift by controllin
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Nakamura, Makoto, and Shinichi Takemura. "A new continuous variable valve event and lift control device." ATZautotechnology 2, no. 1 (2002): 75–77. http://dx.doi.org/10.1007/bf03246673.

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Wei, Luo, Rui Quan Liao, Yong Li, and Ren Dong Feng. "An Improved Continuous Gas Lift Design Method with Variable Pressure Drop." Applied Mechanics and Materials 496-500 (January 2014): 497–502. http://dx.doi.org/10.4028/www.scientific.net/amm.496-500.497.

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As to three kinds of continuous gas lift design methods commonly used using surface casing pressure control all have several disadvantages when the pressure drop between the valves is small, and they have some deficiency when gas injection pressure is relatively inadequate on ground or want to play the affection of the gas injection pressure on ground as much as possible, therefore, the applied study is made in this regard. First, the precise calculation method of the top valve depth under different conditions was achieved based on the principle of U type tube, then an improved variable pressu
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Xu, Yuliang. "Optimization study on valve seating characteristics of hydraulic variable valve system." Journal of Computational Methods in Sciences and Engineering 24, no. 6 (2024): 4019–37. https://doi.org/10.1177/14727978241299543.

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Variable valve technologies, as an advanced category aimed at enhancing internal combustion engine thermal efficiency and emission performance, are highly favored within the automotive industry. This paper proposes a hydraulic variable valve system that can achieve continuous variation in valve phase and lift while maintaining a simple structure. Pre-tests show that at higher engine speeds, the valve seating characteristics are not stable enough. This study believes that in addition to considering the lower seating velocity, the valve seating characteristics also needs to take into account the
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Yamada, Yoshihiko, Kenichi Machida, and Tetsuo Yamazaki. "Development of Continuous Variable Valve Event and Lift Control System for SI Engine (VEL)." SAE International Journal of Engines 1, no. 1 (2008): 949–59. http://dx.doi.org/10.4271/2008-01-1348.

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Sun, Tingting, Yingjie Chang, Zongfa Xie, et al. "Experimental research on pumping losses and combustion performance in an unthrottled spark ignition engine." Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy 232, no. 7 (2018): 888–97. http://dx.doi.org/10.1177/0957650918754684.

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A novel fully hydraulic variable valve system is described in this paper, which achieves continuous variations in maximum valve lift, valve opening duration, and the timing of valve closing. The load of the unthrottled spark ignition engine with fully hydraulic variable valve system is controlled by using an early intake valve closing rather than the conventional throttle valve. The experiments were carried out on BJ486EQ spark ignition engine with fully hydraulic variable valve system. Pumping losses of the throttled and unthrottled spark ignition engines at low-to-medium loads are compared a
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Baek, Soo-Whang. "Design and Implementation of an Automotive BLDC Motor for a Continuous Variable Valve Lift System." International Journal of Control and Automation 11, no. 10 (2018): 95–106. http://dx.doi.org/10.14257/ijca.2018.11.10.09.

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Zhang, Kaiyu, Yingjie Chang, Zongfa Xie, Tingting Sun, and Fei Chen. "Effect of intake swirl on combustion performance in an unthrottled spark ignition engine." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 233, no. 5 (2018): 1269–79. http://dx.doi.org/10.1177/0954407018769172.

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A Fully Hydraulic Variable Valve System is described in this article which can achieve continuous variation in valve lift, duration, and timing. The system was installed in a four-cylinder port fuel injection spark ignition engine and achieved unthrottled load control through early intake valve closing. The in-cylinder pressure measured experimentally showed that pumping losses of the unthrottled spark ignition engine at 2000 r/min and 0.189 MPa brake mean effective pressure was reduced by 85.4% compared with the throttled spark ignition engine. However, its slow and unstable combustion reduce
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Book chapters on the topic "CVVL- Continuous Variable Valve Lift"

1

Liang, Mingxi, Cheng Liu, Wenxin Cai, Cheng Meng, Jian Wan, and Liu Hong. "The Deblocking Function Optimal Design for a Continuous Variable Valve Lift System." In Lecture Notes in Electrical Engineering. Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-9718-9_36.

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Conference papers on the topic "CVVL- Continuous Variable Valve Lift"

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Himsel, Frank, Christof Faria, Peter Solfrank, Ulrich Grau, and Uwe Geiger. "INA EcoValve A Continuously Variable Valve Lift (CVVL) System." In SAE 2004 World Congress & Exhibition. SAE International, 2004. http://dx.doi.org/10.4271/2004-01-1391.

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Bukovnik, Sasa, Tigran Parikyan, Thomas Resch, and Wolfgang Hellinger. "New Kinematic Design Methodology and Dynamic Simulation of Continuously Variable Valve Lift (CVVL) System." In SAE 2010 World Congress & Exhibition. SAE International, 2010. http://dx.doi.org/10.4271/2010-01-1202.

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Park, Nogill, Jonghyeon Sohn, Gyeangmyeang Baek, and Chunghan Oh. "Optimal Design of Worm Gear System Usage in CVVL for Automobiles." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-63365.

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Gearing with a ZK worm and an involute helical gear is used in the motor drive system of automotive continuous variable valve lift (CVVL) because of production cost. Since the geared system does not satisfy the meshing condition, transmission error (TE) and teeth interference (TI) are inevitable. This paper introduces a method for reducing TE and eliminating TI. Transmission error function is derived mathematically and used in checking TI. The first prototype for an automobile shows a lot of NVH problem, which is simply combined by coinciding with the helix/lead angles of two gears at the pitc
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Malkhede, Dileep, Sudesh Jadhav, and Amit Dhotre. "Kinematic Analysis of Continuous Variable Valve Lift Mechanism for SI Engine." In Symposium on International Automotive Technology 2017. SAE International, 2017. http://dx.doi.org/10.4271/2017-26-0033.

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Getzlaff, Jörn, Tobias Dost, Thomas Lambert, and Erik Lenk. "A Fully Variable Hydraulic Valve Train Concept with Continuous Measuring of the Valve Lift Movement." In SAE 2015 World Congress & Exhibition. SAE International, 2015. http://dx.doi.org/10.4271/2015-01-0323.

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Takemura, Shinichi, Shunichi Aoyama, Takanobu Sugiyama, et al. "A Study of a Continuous Variable Valve Event and Lift (VEL) System." In SAE 2001 World Congress. SAE International, 2001. http://dx.doi.org/10.4271/2001-01-0243.

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Nakamura, Makoto, Seinosuke Hara, Yoshihiko Yamada, et al. "A Continuous Variable Valve Event and Lift Control Device (VEL) for Automotive Engines." In SAE 2001 World Congress. SAE International, 2001. http://dx.doi.org/10.4271/2001-01-0244.

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Dost, Tobias, Ricardo Schambach, and Joern Getzlaff. "Gas Exchange Potential Ratio – A Quantitative Evaluation Parameter for Fully Variable, Time-Based Valve Train Concepts." In WCX SAE World Congress Experience. SAE International, 2024. http://dx.doi.org/10.4271/2024-01-2828.

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<div class="section abstract"><div class="htmlview paragraph">The research and development of variable valve train concepts increase the DOF of their functionalities. Beginning with discrete switching between two valve timings (Alfa Romeo: “Variatore di Fase Dinamico”), also the discrete variability of the valve lift (Honda: “VTEC”) was introduced in the 1980s. Increasing the variability to continuous camshaft phasing in the 1990s (Porsche: “VarioCam”) and lift control in the 2000s (BMW: “VALVETRONIC”) an almost fully variable electrohydraulic valve train concept for the inlet valv
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