초록 ▼

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 v

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.

대표청구항 ▼

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 si

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.