Experimental Method to Derive Optimum Engine Mount System for Idle Shake

1987 ◽  
Author(s):  
H. Hata ◽  
H. Tanaka
Keyword(s):  
Experimental Method ◽  
Engine Mount ◽  
Idle Shake

Active Engine Vibration Isolation Using Robust Control

2013 ◽  
Vol 380-384 ◽  
pp. 504-507
Author(s):  
Guo Chun Sun ◽  
Chun Hua Zhang ◽  
Hua Xin
Keyword(s):  
Vibration Isolation ◽  
Experimental Result ◽  
Performance Tests ◽  
Engine Operation ◽  
Engine Vibration ◽  
Engine Mount ◽  
Active Engine ◽  
Vibration Isolation Performance ◽  
Isolation Performance ◽  
Idle Shake

This paper introduces a prototype active engine mount (AEM) system designed for commercial passenger, requiring a good engine vibration solation performance. The AEM consists of a conventional hydraulic engine mount and an internal electromagnetic actuator. The robust H controller was adopted to cancel out the force transmitted through the AEM. The vibration isolation performance tests were carried out by simulating the engine idle shake. The experimental result confirmed that can control unwanted vibration from the engine operation by using active mounts.

scholarly journals Application of Evolutionary Computation in Automotive Powertrain Mount Tuning

2006 ◽  
Vol 13 (2) ◽  
pp. 85-102 ◽  
Author(s):  
Anab Akanda ◽  
Chandu Adulla
Keyword(s):  
Finite Element ◽  
Evolutionary Computation ◽  
Optimization Problem ◽  
Design Parameters ◽  
Production Environment ◽  
Finite Element Software ◽  
Starting Point ◽  
Gradient Based ◽  
Engine Mount ◽  
Idle Shake

Engine mount tuning is a multi-disciplinary exercise since it affects Idle-shake, Road-shake and power-train noise response. Engine inertia is often used as a tuned absorber for controlling suspension resonance related road-shake issues. Last but not least, vehicle ride and handling may also be affected by mount tuning. In this work, Torque-Roll-Axis (TRA) decoupling of the rigid powertrain was used as a starting point for mount tuning. Nodal point of flexible powertrain bending was used to define the envelop for transmission mount locations. The frequency corresponding to the decoupled roll mode of the rigid powertrain was then adjusted for idle-shake and road-shake response management.A TRA decoupling procedure, cast as a multi-objective optimization problem, was applied to a body-on-frame sport-utility vehicle powertrain system. In addition to a standard gradient based optimization algorithm, available in commercial finite element software, an evolutionary computation paradigm known as Evolutionary Strategies (ES) was used to solve the optimization problem. The primary advantages of evolutionary computation over gradient based algorithms are as follows: i) They are less likely to get trapped in local minima and less dependent on initial values of the design parameters and therefore able to handle multi-modal optimization problems unlike gradient based algorithms, ii) They produce a population of viable solutions, unlike gradient based algorithms which yields a single solution. The second advantage is very attractive in a production environment since packaging and other multi-disciplinary constraints often require multiple quality solutions for the same problem. The process outlined in this work was verified by exercising a full-vehicle finite element model. The process produced a set of production feasible powertrain mount parameters for acceptable idle and road shake performance.

Tuning of a Rear Electronic Control Engine Mount

1995 ◽  
Author(s):  
Daniel D. Galvin
Keyword(s):  
Transfer Function ◽  
Individual Component ◽  
Electronic Control ◽  
Component Testing ◽  
State Transfer ◽  
Function Calculation ◽  
Engine Mount ◽  
Graph System ◽  
Idle Shake

Abstract This paper refers to mathematical tuning, by the sinusoidal steady-state transfer function method, of an adjustable hydraulic rear engine mount for reduction of perceived vibration during engine idle situations. The problem being addressed, in particular, is the reduction of “idle shake”. The accuracy of this method is confirmed by individual component testing along with in situ vibration measurements. During this work, a general approach to transfer function calculation is given by evaluating the system components with the linear-graph system of modeling. This is complemented by component verification and curve-fitting to arrive at the final transfer function which reveals the inherent tendencies of the overall system. Secondary measurements are then employed to rectify the contradiction between mathematical values and subjective results.

Idle shake vibration optimization of an engine mounting system through the practical application of transfer path analysis

2020 ◽  
Vol 68 (6) ◽  
pp. 459-469
Author(s):  
E. Courteille ◽  
F. Mortier
Keyword(s):  
Path Analysis ◽  
Hybrid Approach ◽  
Measurement Data ◽  
Vibration Level ◽  
Practical Application ◽  
Idle Speed ◽  
Transfer Path ◽  
Engine Mount ◽  
Transfer Path Analysis ◽  
Idle Shake

This article presents a practical application of experimental transfer path analysis (TPA) for optimizing idle shake vibrations of a front-wheel-drive car with a transversely mounted four-cylinder diesel engine. Performance control of the vehicle engine mounting system must take into account the multiple dynamic interactions between the engine mounting system, subframe modes and the vehicle suspension. Experimental methods can be used in conjunction with simulations to design and optimize the engine mounting system. TPA is a powerful tool for the diagnosis of vibration and noise transmission via multiple solid paths. TPA allows a quick diagnosis of the engine mounting system performances on vehicle comfort. A strong synergy between numerical model and experimental data finally makes it possible to find better design alternatives, not necessarily obvious to the designer. This study is the guideline for an optimization of the engine mount noise vibration and harshness (NVH) performances by using a hybrid approach, combining an analytical approach and measurement data. First, a diagnosis of the transmission of structure-borne vibrations via the engine mounting system to the seat floor is done at constant idle speed. This method is used to rank individual engine mount contributions in the low-frequency vibration level inside the vehicle. Then, an original approach allows the optimization of the vibration level at idle speed by offsetting contributions of the engine mount paths by adding damping in the right engine mount. This approach has led to the design and validation of an original double inertia-track hydroelastic mount prototype which allows a 5-dB reduction on the seat floor vibration level. The future development of a new version is planned to confirm and optimized the obtained results. The length of the second inertia track will be increased to reach the targeted characteristics, and the adjustment system will be removed to respect the overall dimension constraints of the mount.

Experimental Method in Antiquity.

1964 ◽  
Vol 19 (6) ◽  
pp. 419-419
Author(s):  
Frank P. Jones
Keyword(s):  
Experimental Method

Monitoring bedload sediment transport in a pre-Alpine river: an experimental method

2017 ◽  
Vol 43 ◽  
pp. 57-63 ◽  
Author(s):  
Monica Papini ◽  
Vladislav Ivov Ivanov ◽  
Davide Brambilla ◽  
Diego Arosio ◽  
Laura Longoni
Keyword(s):  
Sediment Transport ◽  
Experimental Method ◽  
Alpine River ◽  
Bedload Sediment

“I stay at work for you, you stay at home for us.” Does this Covid-19 campaign work for the youth in Asia?

2020 ◽  
Vol 8 (2) ◽  
pp. 161-175
Author(s):  
Jappy Fanggidae ◽  
Ridolof Batilmurik ◽  
Pieter Samadara
Keyword(s):  
Experimental Method ◽  
Social Distancing ◽  
Asian Context ◽  
The Relationship ◽  
At Home

This study investigated the relationship between guilt appeal and compliance with social distancing measures. We proposed that the relationship is double mediated by empathy and responsibility for the unfortunate people who have suffered from COVID-19. This research is novel to an extent as an experimental method is used in the Asian context. The results exhibited that guilt positively affected compliance with social distancing measures. The respondents were directly or indirectly compliant due to the emotions of empathy and responsibility. The theoretical and practical contributions of this study were presented.

ANALISIS BEBAN PENDINGINAN PADA COLD STORAGE UNTUK PENYIMPANAN DAGING

2019 ◽  
Vol 7 (1) ◽  
pp. 12-22
Author(s):  
Ratu Mutia Fajarani ◽  
Yopi Handoyo ◽  
Raden Hengki Rahmanto
Keyword(s):  
Experimental Method ◽  
Cold Storage ◽  
Freezing Point ◽  
Cooling Load ◽  
Internal Factors ◽  
External Cooling ◽  
Preservation Method ◽  
Load Calculation ◽  
Selection Of

Cooling is the best preservation method than others because the food that has been cooled will remain fresh and will not experience a change in taste, color and aroma, besides all the activities that cause decay will stop so that the cooled food will last longer. (Hartanto, 1984). With the proper cooling engine planning, it can help with spatial adjustments, adjustments to loading, estimation of the power to be used, and budget plans. That is what is commonly called the cooling load calculation. Calculation of cooling load needs to be carried out before planning. This is necessary because the magnitude of the pending load is very influential on the selection of the cooling engine so that the freezing point for preserving food can be accurate. Pendiginan burden is influenced by external and internal factors. With the experimental method, it is obtained the results of the external cooling load as the external cooling load is 11.6 kW, the inner cooling load is 138.8 kW and the performance work coefficient (COP) is 2.

Performance Evaluation of Linear Oscillatory Actuator for Active Control Engine Mount

2012 ◽  
Vol 132 (12) ◽  
pp. 1091-1096 ◽  
Author(s):  
Fumiya Kitayama ◽  
Katsuhiro Hirata ◽  
Yasuyoshi Asai
Keyword(s):  
Performance Evaluation ◽  
Active Control ◽  
Engine Mount
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