Advanced Optimization Techniques in Valvetrain Design

Ernst, Roland; Schamel, Andreas; Meyer, Jürgen

doi:10.4271/932004

Cited by 8 publications

(6 citation statements)

References 6 publications

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“…(14) and (15), the polynomial coefficients can be obtained by a system of equations as follows g ð4Þ ðxÞ ¼ 0 ð16Þ…”

Section: Algorithm a -Cam Profile Synthesis Using The Cubic Smoothingmentioning

confidence: 99%

“…By adjusting the weighting factors and the redundant constants, designers can tighten or loosen the local constraints in the designed cam profiles [15]. On the other hand, smoothness of the designed cam profile is also important for better performance in highspeed cam follower systems [12,14]. The roughness penalty function, which is defined in Eq.…”

Section: Introductionmentioning

confidence: 99%

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Flexible cam profile synthesis method using smoothing spline curves

Nguyen

Kim

2007

Mechanism and Machine Theory

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“…(14) and (15), the polynomial coefficients can be obtained by a system of equations as follows g ð4Þ ðxÞ ¼ 0 ð16Þ…”

Section: Algorithm a -Cam Profile Synthesis Using The Cubic Smoothingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flexible cam profile synthesis method using smoothing spline curves

Nguyen

Kim

2007

Mechanism and Machine Theory

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“…Lu et al discussed the objectives and constraints of cam profile optimization and pointed out some problems of valve train design [11]. Ernst optimization aimed at reducing oscillation amplitudes [12]. Seldom does the literature discuss the Pareto solution of the multi-objective optimization problem of cam profile design for engine valve trains.…”

Section: Introductionmentioning

confidence: 99%

Study on optimal kinematic synthesis of cam profiles for engine valve trains

Qin

Chen

2014

Applied Mathematical Modelling

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a b s t r a c tKinematic cam profile synthesis for engine valve trains to satisfy the requirements of a large lift area and small acceleration magnitudes is a multi-objective optimization problem. This paper proposed that its Pareto optimal solution set is constructed with constant acceleration profiles. For the definite design of an engine valve train, its Pareto front is a function of the time durations of the positive and negative accelerations. The relationships of positive acceleration, negative acceleration, and lift area for a constant acceleration cam profile are analyzed, and the results are applied to discuss the characteristics of polynomial cam profiles.

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“…Kim and David 11 optimized the cam curve of high-speed valve train systems to minimize the residual vibration amplitude of the valve. Ernst et al 12 established a sophisticated approach for the optimum design of cam profile in the valve train system by using a spline function. Their numerical and experimental results showed that their model successfully improved the overall design.…”

Section: Introductionmentioning

confidence: 99%

Mathematical modeling and simulation of high-speed cam mechanisms to minimize residual vibrations

Kaplan

2014

Proceedings of the Institution of Mechanical Engineers, Part C:

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Mathematical modeling, simulation, and optimum design of equivalent one degree-of-freedom high-speed cam mechanisms used for internal combustion engines are investigated in this study. The dynamic equation governing the dynamic behavior of a typical high-speed cam–follower system of an internal combustion engine has been simplified using dimensionless analysis method. The resulting model is then used to find the optimum cam shape to reduce the residual vibrations in the follower part of the system. The Lagrange multipliers method is utilized to minimize the sum of squared error (deviation from the cam profile) over one period under continuity and smoothness constraints.

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Advanced Optimization Techniques in Valvetrain Design

Cited by 8 publications

References 6 publications

Flexible cam profile synthesis method using smoothing spline curves

Flexible cam profile synthesis method using smoothing spline curves

Study on optimal kinematic synthesis of cam profiles for engine valve trains

Mathematical modeling and simulation of high-speed cam mechanisms to minimize residual vibrations

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