Control method of MDPS
First Claim
1. A control method of a motor driven power steering (MDPS) for a vehicle comprising:
- determining whether the vehicle is in a straight state after steering the vehicle and whether a steering wheel is in a neutral state; and
compensating a steering angle of the steering wheel by checking a return-ability of the steering wheel to adjust the steering wheel,wherein determining whether the steering wheel is in the neutral state comprises;
determining whether a speed of the vehicle is within a predetermined range;
determining whether a steering angular velocity of the steering wheel is equal to or less than a first predetermined value;
determining whether a yaw velocity of the vehicle is equal to or less than a second predetermined value; and
determining whether a steering torque of the steering wheel is equal to or less than a third predetermined value, andwherein determining whether the steering wheel is in the neutral state further comprises;
determining whether a steering torque variation rate is greater than a predetermined value and whether a yaw velocity variation rate satisfies a predetermined range is based on information regarding the steering torque variation rate, the yaw velocity of the steering wheel, and a steering remaining angle.
1 Assignment
0 Petitions
Accused Products
Abstract
A control method of a motor driven power steering (MDPS) for a vehicle may include determining a steering angle of a steering wheel of the vehicle; determining a steering torque variation rate of the vehicle; counting an exceeding number of times that the steering torque variation rate exceeds a predetermined value to store the counted number of times in an MDPS system; and deleting the number of times stored in the MDPS system when the exceeding number of times is less than a predetermined number of times, and applying a reverse phase compensation torque to a steering motor when the exceeding number of times is equal to or larger than the predetermined number of times.
22 Citations
8 Claims
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1. A control method of a motor driven power steering (MDPS) for a vehicle comprising:
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determining whether the vehicle is in a straight state after steering the vehicle and whether a steering wheel is in a neutral state; and compensating a steering angle of the steering wheel by checking a return-ability of the steering wheel to adjust the steering wheel, wherein determining whether the steering wheel is in the neutral state comprises; determining whether a speed of the vehicle is within a predetermined range; determining whether a steering angular velocity of the steering wheel is equal to or less than a first predetermined value; determining whether a yaw velocity of the vehicle is equal to or less than a second predetermined value; and determining whether a steering torque of the steering wheel is equal to or less than a third predetermined value, and wherein determining whether the steering wheel is in the neutral state further comprises; determining whether a steering torque variation rate is greater than a predetermined value and whether a yaw velocity variation rate satisfies a predetermined range is based on information regarding the steering torque variation rate, the yaw velocity of the steering wheel, and a steering remaining angle. - View Dependent Claims (2, 3, 4, 5)
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6. A control method of a motor driven power steering (MDPS) for a vehicle, comprising:
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determining a steering angle of a steering wheel and a steering torque variation rate; determining a speed of the vehicle, a steering angular velocity of the steering wheel, and a yaw velocity of the steering wheel; determining whether the steering angle of the steering wheel is greater than a first predetermined value and whether a yaw velocity variation rate satisfies a predetermined range; and counting a number of times that the steering angle is determined to be greater than the first predetermined value and the yaw velocity variation rate is determined to satisfy the predetermined range to store the counted number of times in an MDPS system, and compensating the steering angle to adjust a steering remaining angle to a steering neutral state, wherein counting and compensating are performed simultaneously, wherein the method further includes determining whether the steering torque variation rate is greater than the first predetermined value and whether the yaw velocity variation rate satisfies the predetermined range is based on information regarding the steering torque variation rate, the yaw velocity of the steering wheel, and the steering remaining angle. - View Dependent Claims (7, 8)
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Specification