Vehicle driveline balancing

Details Vehicle driveline balancing Vehicle driveline balancing

1994-06-27

1995-07-11

Williams, Hezron E.

Measuring and testing

Rotor unbalance

In situ

73458, 73593, G01M 124

Patent

active

054310490

ABSTRACT:
A method and system for balancing an automotive vehicle driveline (10) after it has been installed into a vehicle (8). An impact hammer and a system analyzer (36) are used to determine a frequency response function at each end of a driveshaft (16). From this, a critical frequency of rotation is determined for the driveshaft (16) for that particular model of vehicle (8) and driveline (10). Each vehicle (8) that comes off of an assembly line can now have a balance test performed on it using accelerometers (44 and 46) and a phase angle measurement. Combining the measurement with the frequency response function, the imbalance of the driveline is determined and compared to a predetermined limit to determine if correction masses need to be added. If so, a determination of the amount of mass needed and the orientation is made.

REFERENCES:
patent: 4614506 (1986-09-01), Sakata
patent: 4887989 (1989-12-01), Kerecman
patent: 4895551 (1990-01-01), Fritz
patent: 4984173 (1991-01-01), Imam
patent: 5046361 (1991-09-01), Sandstrom
patent: 5203740 (1993-04-01), Okuzumi et al.

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