Integrated vehicle control system using dynamically determined vehicle conditions
First Claim
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1. A method of controlling a vehicle system vehicle comprising:
- determining, in a controller, a longitudinal acceleration;
determining, in a controller, a longitudinal moment due to longitudinal tire forces in response to the longitudinal acceleration;
determining, in a controller, a first coefficient related to vehicle mass and spring pitch rate;
determining, in a controller, a second coefficient related to vehicle spring rate and pitch inertia;
determining, in a controller, a normalized vertical suspension force induced pitch moment using the first coefficient, the second coefficient and the longitudinal moment;
determining, in a controller, a relative pitch angle in response to the normalized vertical suspension force induced pitch moment; and
controlling the system in response to the relative pitch angle.
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Abstract
A vehicle includes a control system that is used to control a vehicle system. The control system determines a roll condition in response to a yaw rate sensor and a pitch rate sensor without having to use a roll rate sensor. A relative roll angle, relative pitch angle, global roll angle, and global pitch angle may also be determined. A safety system may be controlled in response to the roll condition, roll angle, or the pitch angles individually or in combination.
314 Citations
27 Claims
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1. A method of controlling a vehicle system vehicle comprising:
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determining, in a controller, a longitudinal acceleration; determining, in a controller, a longitudinal moment due to longitudinal tire forces in response to the longitudinal acceleration; determining, in a controller, a first coefficient related to vehicle mass and spring pitch rate; determining, in a controller, a second coefficient related to vehicle spring rate and pitch inertia; determining, in a controller, a normalized vertical suspension force induced pitch moment using the first coefficient, the second coefficient and the longitudinal moment; determining, in a controller, a relative pitch angle in response to the normalized vertical suspension force induced pitch moment; and controlling the system in response to the relative pitch angle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification