Method for determining tractive force required at the wheels of

Details Method for determining tractive force required at the wheels of Method for determining tractive force required at the wheels of

1998-06-05

2000-11-21

Cuchlinski, Jr., William A.

Data processing: vehicles, navigation, and relative location

Vehicle control, guidance, operation, or indication

701 10, 701 50, 701 70, 701 82, 296 13, 296 91, G06F 700, G06F 1700

Patent

active

06151537&

ABSTRACT:
A method for determining the tractive effort required at the wheels of a vehicle for a given set of operating parameters by taking into account a plurality of variables which affect vehicle performance. A total grade effort value is determined which represents the force required to move the vehicle due to the grade of the surface on which the vehicle is expected to travel. An approximate total rolling effort value is also determined which is representative of the force required to move the vehicles due to the hysteresis of the vehicle's tires. Lastly, an aerodynamic influence factor is determined which represents the total air resistance of the vehicle and any implement such as a trailer being towed by the vehicle. These factors are summed to produce a tractive effort value representative of the total tractive effort that would be required to move the vehicle at a designated speed. The method takes into account the ambient temperature of the environment in which the vehicle is operating as well as the barometric pressure to produce a correction factor which may also be applied to the aerodynamic influence factor to take into account the ambient environment in which the vehicle will be operated.

REFERENCES:
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patent: 4964481 (1990-10-01), Sano et al.
patent: 5428531 (1995-06-01), Hayafune
patent: 5508924 (1996-04-01), Yamashita
patent: 5517410 (1996-05-01), Nakagawa et al.
patent: 5563792 (1996-10-01), Ander et al.
patent: 5921780 (1999-07-01), Myers

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