A New 2.3L DOHC Engine with Balance Shaft Housing - Steps of Refinement and Optimization

Huegen, St.; Warren, G. W.; Menne, Rudolf J.; Wolschendorf, Joachim; Schwaderlapp, Markus; Schoenherr, C.

doi:10.4271/970921

Cited by 6 publications

(3 citation statements)

References 1 publication

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“…In general, there are two types of balance shafts: the MMC type (Huegen et al, 1997), and the Lanchester type (Nakamura, 1976). The former reduces the unbalanced bounce force and moment while the latter controls only the bounce force.…”

Section: Inertial Forcementioning

confidence: 99%

Excitation force analysis of a powertrain based on CAE technology

Kim

Lee

2008

Int.J Automot. Technol.

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The excitation force of a powertrain is one of major sources of interior noise in a vehicle. This paper presents a novel approach to predict the interior noise caused by the vibration of the powertrain by using the hybrid TPA (transfer path analysis) method. Although the traditional transfer path analysis (TPA) is useful for the identification of powertrain noise sources, it is difficult to modify the structure of a powertrain by using experiments for the reduction of vibration and noise. In order to solve this problem, the vibration of the powertrain in a vehicle is numerically analyzed by using the finite element method (FEM). The vibration of the other parts of the vehicle is investigated by using experiments based on vibrato-acoustic transfer function (VATF) analysis. These two methods are combined for the prediction of interior noise caused by a powertrain. Throughout this research, two papers are presented. This paper presents a simulation of the excitation force of the powertrain exciting the vehicle body based on numerical simulation. The other paper presents a prediction of interior noise based on the hybrid TPA, which uses the VATF of the car body and the excitation force predicted in this paper.

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Section: Inertial Forcementioning

confidence: 99%

Excitation force analysis of a powertrain based on CAE technology

Kim

Lee

2008

Int.J Automot. Technol.

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“…Oguchi Koji et al designed a silent crankshaft in the engine to reduce its second-order vibration and improve the NVH performance in cars [16]. St. Huege et al developed an in-line four-cylinder engine with a double balance shaft device, which greatly improved the NVH performance [17]. Shoji Adachi et al optimized the mass of reciprocating motion and valve train motion, greatly reducing the second-order inertial force [18].…”

Section: Introductionmentioning

confidence: 99%

A Novel Coaxial Balance Mechanism for Reciprocating Piston Engines

Guan

Wang

et al. 2021

Applied Sciences

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Vibration is an important issue faced by reciprocating piston engines, and is caused by reciprocating inertia forces of the piston set. To reduce the vibration without changing the main structure and size of the original engine, we proposed a novel coaxial balance mechanism design based on a compact unit body. By introducing a second-order balance mass, this mechanism can significantly increase the efficiency of vibration reduction. The proposed mechanism can effectively balance the first-order and second-order inertia forces with the potential of balancing high-order inertia forces. To accurately determine the second-order balance mass, a closed-form method was developed. Simulation results with a single-cylinder piston DK32 engine demonstrate the effectiveness and advantage of the proposed mechanism. At a crankshaft speed of 2350 r/min, compared with the first-order balance device, the average root mean square velocity of the test points on the engine’s cylinder was reduced by 97.31%, and the support reaction force was reduced by 96.54%.

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“…Since the fundamental role of balance shaft module can be conducted by the rotating unbalance mass on balance shaft while a target engine is under operation, the prior interest should be focused on the design of balance shaft including a strategy on unbalance mass as well as supporting bearings. The response of rotor dynamics, shown as reaction forces on bearing or bending deformation, will be dependent on the condition of shape of balance shaft or the location of unbalance mass, even though the unbalances are fixed as certain value (Stone and Ball, 2004;Ishikawa et al, 2002;Suh et al, 2000;Meek and Roberts, 1998;Huegen et al, 1997). Recently, Kim et al (2012) proposed the optimal location of both a supporting bearing and a deflection of balance shaft by introducing the objective function to minimize interesting energy terms, both the elastic strain energy and the kinematic energy of a balance shaft (Kim et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Location of unbalance mass and supporting bearing for different type of balance shaft module

Kim

2018

Mech. Sci.

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Abstract. The dynamic characteristics of balance shaft module is controlled by the design of rotating parts as how to allocate both a unbalance mass and a supporting bearing so that the concept design of a rotor structure is the key issue on determining the overall quality of dynamic performance as well as fatigue resistance. Even the design on balance shaft has some limitation from the lay-out of a vehicle engine system, there is still chance to enhance the reliability of the balance shaft module by the promising design model of the rotor structure including support bearing locations. In this paper, an optimal location of unbalance mass and supporting bearing is proposed to make an efficient conceptual design using an objective function to minimize a bending deformation of rotor as well as a reaction force at supporting bearing. In addition, the application of design optimization of a balance shaft model is explained using an in-house program for inline 3-cylinder and inline 4-cylinder engine, respectively.

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A New 2.3L DOHC Engine with Balance Shaft Housing - Steps of Refinement and Optimization

Cited by 6 publications

References 1 publication

Excitation force analysis of a powertrain based on CAE technology

Excitation force analysis of a powertrain based on CAE technology

A Novel Coaxial Balance Mechanism for Reciprocating Piston Engines

Location of unbalance mass and supporting bearing for different type of balance shaft module

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