NVH Improvement of a Bus Through AC Compressor Drive-Ratio Change Tata Motors Limited, India

Format:

Conference/Event

Author/Creator:

Naga Suresh, I., author.

Conference Name:

SIAT 2009 (2009-01-21 : Pune, India)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Pune, MH The Automotive Research Association of India 2009

Summary:

This paper is an outcome of development work done in improving Noise Vibration Harshness (NVH) performance of a bus. A concern from built-up prototypes was high floor vibration levels at higher speeds when Air-Conditioner (AC) was switched on. Running mode analysis of bus-vibrations was performed to visualize exact behavior of its frame. It was revealed that a 4th order vibrations of the AC compressor was matching with a structural resonance of the bus frame on which the AC compressor was mounted. The frame suffered from high amplitudes of torsional vibrations especially near a power-train mount. And these excitations were transferred to the bus-floor. With a change in drive-ratio of the AC compressor, decoupling of its vibrations from the Bus-frame mode was made. This led to a significant reduction of the floor vibrations and increased comfort to the passengers at higher speeds

Notes:

Vendor supplied data

Publisher Number:

2009-26-0045

Access Restriction:

Restricted for use by site license