Recursive vehicle mass estimation system
First Claim
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1. A system, comprising:
- a vehicle including an engine with a fueling system, a transmission coupled to said engine having a plurality of engageable gear ratios, a drive axle, and a propeller shaft coupling said transmission to said drive axle;
a vehicle speed sensor, said sensor providing a speed signal corresponding to speed of the vehicle;
a programmable processor with a memory portion operatively coupled thereto, said processor being responsive to an engine fueling rate signal and a gear ratio signal stored in said memory to determine a vehicle push force corresponding to said speed signal, said processor being programmed to qualify a data segment from vehicle speed and vehicle push force to calculate an estimated vehicle mass, said estimated vehicle mass being determined by a recursive analysis of said data segment and establishing said vehicle speed as a function of said push force.
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Abstract
A method and apparatus is disclosed for recursively estimating vehicle mass and/or aerodynamic coefficient of a moving vehicle. The vehicle speed and push force data are collected and a segment of qualified data is then selected from the collected data. Newton'"'"'s second law is integrated to express vehicle mass and/or aerodynamic coefficient in terms of vehicle push force and vehicle speed. This expression is then used in a recursive analysis of the qualified data segment to determine an estimated vehicle mass and/or aerodynamic coefficient.
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Citations
21 Claims
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1. A system, comprising:
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a vehicle including an engine with a fueling system, a transmission coupled to said engine having a plurality of engageable gear ratios, a drive axle, and a propeller shaft coupling said transmission to said drive axle;
a vehicle speed sensor, said sensor providing a speed signal corresponding to speed of the vehicle;
a programmable processor with a memory portion operatively coupled thereto, said processor being responsive to an engine fueling rate signal and a gear ratio signal stored in said memory to determine a vehicle push force corresponding to said speed signal, said processor being programmed to qualify a data segment from vehicle speed and vehicle push force to calculate an estimated vehicle mass, said estimated vehicle mass being determined by a recursive analysis of said data segment and establishing said vehicle speed as a function of said push force. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
means for determining an engine fueling rate and providing said engine fueling rate signal corresponding thereto; and
means for determining a presently engaged gear ratio of said transmission and providing said gear ratio signal corresponding thereto.
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12. The system of claim 1, wherein said vehicle speed sensor senses the rotational speed of a vehicle component to provide said speed signal.
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13. The system of claim 1, wherein said data segment is selected by said processor from a longest segment of buffered qualified data including said vehicle speed and said vehicle push force.
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14. The system of claim 1, wherein said processor is operable to provide a control signal based on said estimated vehicle mass.
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15. A system, comprising:
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a vehicle including an engine with a fueling system, a transmission coupled to said engine having a plurality of engageable gear ratios, a drive axle, and a propeller shaft coupling said transmission to said drive axle;
a vehicle speed sensor, said sensor providing a speed signal corresponding to speed of the vehicle;
a programmable processor with a memory portion operatively coupled thereto, said processor being responsive to an engine fueling rate signal and a gear ratio signal stored in said memory to determine a vehicle push force corresponding to said speed signal, said processor being programmed to calculate an estimated vehicle mass from said vehicle speed and said vehicle push force data, said estimated vehicle mass being determined by a recursive analysis of said data and establishing said vehicle speed as a function of said push force. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification