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

Qin, Wenjie; Chen, Youming

doi:10.1016/j.apm.2014.02.015

Cited by 12 publications

(5 citation statements)

References 10 publications

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“…Bazier curves were used to design and optimize the cam profile for mandible of patients [10]. Author concludes that accurate reproduction of 3D model is possible by representing the cam profile by curve equations.…”

Section: Vishalkumar K Dhummansure D Ramesh Rao and Yogesh Bagmarmentioning

confidence: 99%

CAM Profile Optimisation of Single Cylinder Diesel Engine to Reduce Noise and Vibration

Dhummansure¹,

Tjprc²

2018

IJMPERD

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The optimization of the cam profile plays an important role to reduce noise and vibration in an internal combustion engine. This study analyzes a method for the design and experimentation of different cam profiles. The proposed method commences with the use of higher order polynomials for the cam profile. Subsequently, an optimum cam profile is redesigned and used in the engine. The improvement of the cam profile is based on optimized factors such as velocity and acceleration in the cam profile. The vibration and noise due to impact between cam and tappet can be controlled by adjusting the ramp height and the velocity in the ramp area. Also, there is a significant improvement in Sound quality. The experimental result shows a reduction in overall noise by 1.86dB (A) in case of optimized cycloidal cam profile of single cylinder engine.

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Section: Vishalkumar K Dhummansure D Ramesh Rao and Yogesh Bagmarmentioning

confidence: 99%

CAM Profile Optimisation of Single Cylinder Diesel Engine to Reduce Noise and Vibration

Dhummansure¹,

Tjprc²

2018

IJMPERD

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“…Currently, a substantial body of scholarly work has been dedicated to the optimization of cam profiles. Qin et al [4] established a multi-objective optimization model whose goals were to minimize the follower's positive and negative acceleration values and maximize the follower's lift area. They also solved the Pareto optimal set of solutions for the engine gas distribution mechanism's acceleration cam profiles and used the relationship between the follower's lift area and acceleration values to characterize the polynomial cam profiles.…”

Section: Introductionmentioning

confidence: 99%

Cam Profile Design of Low-Speed Marine Diesel Engine Based on the Grey Theory

Xu,

Chen,

Jing

2024

J. Phys.: Conf. Ser.

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The camshaft profile is one of the important parameters of the engine, the reasonableness or otherwise of its design directly influences the engine’s power output, fuel consumption, emissions, noise and reliability. However, most existing cam profile optimization designs are based on the basic software operation, profile parameter selection and tuning lack a scientific theoretical basis. In order to address this issue, this study establishes a single valve kinematic model of the gas delivery mechanism of diesel engines by using the AVL-EXCITE Timing Drive, and performs a model-based multinomial kinematic acceleration cam profile design. Subsequently, an orthogonal design method is employed to obtain the parameter combinations that can satisfy the dynamic requirements. The research investigates the influence of cam profile design parameters (C 4, p, q, r, and s) on valve fullness, maximum jerk, cam contact stress, and valve seating force through a systematic study. Lastly, based on the grey correlation theory, a thorough analysis of the performance indices of cams with different profile parameter combinations is conducted. The optimization problem of the profile parameters with multiple performance indicators is transformed into a single-objective grey relational optimization problem, resulting in the optimal cam profile parameter combination of C4 =0.1, p=14, q=20, r=28 and s=36. The optimal method proposed in the paper is straightforward to implement and is applicable to the optimum design of cam profiles of the engine, which is of great importance for the optimal design of cam fabrication processes.

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“…A typical design approach is to translate kinematic curve synthesis problems into algebraic problems with the spline interpolation function as the destination [8,9], e.g., cubic splines [10], Bezier curves [11,12], triangular splines [13], Hermite splines [14], B splines [15,16], and Non-Uniform Rational B-Splines (NURBS) curves [16,17]. In addition, kinematic and dynamical methods have been applied to the design of cam mechanisms [18,19]. In order to obtain kinematic curves with good dynamic properties under arbitrary design requirements, the kinematic model parameters are obtained by optimising the dynamic performance [20,21].…”

Section: Introductionmentioning

confidence: 99%

A General Design Method of Cam Profile Based on Cubic Splines and Dynamic Model: Case Study of a Gravity-Driven Tricycle

et al. 2022

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This paper proposes a general design method for cams based on the kinematics and dynamics of a mechanical system. According to the actuator’s trajectory, the cam profile is generated in reverse based on the kinematic model of the system. Firstly, the cam design’s optimising problem is converted into the execution trajectory’s optimisation to obtain the optimum operation trajectory according to the actuator’s requirements. Secondly, the relationship between the cam profile and the actuation trajectory is modelled based on the kinematics and dynamics of the mechanical system. Then, applying the cubic spline interpolation method, the cam profile is generated, and the error compensation methods are illustrated through numerical analysis. Finally, the validity of the presented design method is verified through experiments, which demonstrate the reliability of this method.

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

Cited by 12 publications

References 10 publications

CAM Profile Optimisation of Single Cylinder Diesel Engine to Reduce Noise and Vibration

CAM Profile Optimisation of Single Cylinder Diesel Engine to Reduce Noise and Vibration

Cam Profile Design of Low-Speed Marine Diesel Engine Based on the Grey Theory

A General Design Method of Cam Profile Based on Cubic Splines and Dynamic Model: Case Study of a Gravity-Driven Tricycle

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