Roll-Down Considerations in Idle Quality General Motors Powertrain Group Integration Engineering Center

Format:

Conference/Event

Author/Creator:

Beikmann, Randall S., author.

Conference Name:

SAE 2001 Noise & Vibration Conference & Exposition (2001-04-30 : Grand Traverse, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2001

Summary:

Idle quality is a complex phenomenon, involving both the average vibration amplitude perceived by the occupants and also its unsteady, erratic shake amplitude (here referred to as lumpiness). Besides the periodic combustion torque produced by an ideal engine, cycle-to-cycle combustion variation causes a random torque component. Together, these torque components cause periodic and random vibration response components. The random component, by its nature, has modulating amplitude. Further, depending on their dominant frequencies and amplitudes, the random and periodic components can modulate with each other. The resulting sudden change in amplitude is often interpreted as an engine "miss" or partial burn, when in fact it may not be. This and other idle phenomenon are also highly affected by the sensitivity of the vehicle, as determined by the powertrain mounting and body structure

Notes:

Vendor supplied data

Publisher Number:

2001-01-1501

Access Restriction:

Restricted for use by site license