Idle Vibration Robustness Analysis of an I3 Engine without Balance Shaft Zhejiang Geely Automoile Research Institute Company, Limited

Format:

Book

Conference/Event

Author/Creator:

Teng, Charlie, author.

Contributor:

Shen, Lianjun

Shi, Daiyun

Zhao, Ke

Conference Name:

Noise and Vibration Conference & Exhibition (2021-09-07 : Grand Rapids & Online, Michigan, United States)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2021

Summary:

I3 engine has its unique advantage to help OEM's meeting the ever-increasing government regulations in emission and fuel economics. Its small size, low friction, and light weight provide OEM the opportunity in lowering the costs, reducing fuel consumption and emissions. In addition, when HEV gradually becomes the primary options for the new energy vehicles, I3 engine will find another avenue to become mainstream of Powertrain. In China, ISH predicts that, in 2025, the I3 engine will count for 38% of IC engine volume. However, one of biggest drawbacks of the I3 engine is its reputation of higher vibration levels, especially in idle conditions. This is due to its cylinder layout resulting in 1st order inertia moments and its combustion characteristics producing lower frequency (1.5th order) combustion excitation torque. To compensate the 1st order inertia moments, a balance shaft is typically added. While the balance shaft resolves the vibration issues, it adds significant cost and weight in the I3 engine applications. In this paper, a study is carried out on a 1.0L I3 engine to eliminate the balance shaft thought the Powertrain mount optimization including the robustness analysis. First a Powertrain right and left mount rates' optimization is performed based on the different I3 engine balancing rates with the optimization goal of minimizing the idle vibration. Secondly, a Powertrain rear mount rate optimization is carried out to improve the startup and shutoff shake. Thirdly, based on the optimized mount rates determined in first and second steps, a robustness study is done based on the mount supplier manufacturing capability, which ensures that the mount rates determined in the optimization process are robust enough in production. During the optimization process, a solid CAE and testing correlation is established which ensures that the CAE analysis can be used in the future design

Notes:

Vendor supplied data

Publisher Number:

2021-01-1023

Access Restriction:

Restricted for use by site license