Method for the detection of curves and the determination of the transverse acceleration in a vehicle
First Claim
Patent Images
1. Method for controlling one of brake slippage and drive slippage in a vehicle having two non-driven wheels when said vehicle is driven in a curve, said method comprisingmeasuring the speeds of said non-driven wheels to produce wheel speed signals VL and VR ;
- determining the difference Δ
V=VL -VR, said difference having a slope;
filtering said difference to produce a filtered difference Δ
VF =Δ
V when said slope is less than a predetermined value ±
a, said filtered difference Δ
VF having a slope ±
a when the slope of Δ
V is greater than ±
a;
forming a mean value VM =1/2(VL +VR);
forming correction signals Ki according to the equations K1 =Δ
VF /VM when VM exceeds a predetermined speed and K2 =(Δ
VF -Δ
VG)/VM when VM is less than or equal to said predetermined speed, Δ
VG being a stored value dependent upon vehicle speed,forming a mean value Ki from successively determined correction signals Ki ;
forming a corrected speed difference Δ
VK =Δ
VF -Ki VM, wherein Ki =K1 when K1 was formed at least once during a ride,generating a signal indicative of a curve when Δ
VK exceeds a curve determination speed value, andcontrolling one of brake slippage and drive slippage in said vehicle by using said signal indicative of a curve as a control parameter in a respective one of an antilock brake system and an antislip drive system of the vehicle.
0 Assignments
0 Petitions
Accused Products
Abstract
A method for detecting when a vehicle drives in a curve for which the wheel speed sensors of the non-driven wheels are sufficient and supplies a correct statement even in case of interferences or different circumferential distances. Also, an output signal can be recovered which corresponds to the values of the available transverse acceleration.
-
Citations
13 Claims
-
1. Method for controlling one of brake slippage and drive slippage in a vehicle having two non-driven wheels when said vehicle is driven in a curve, said method comprising
measuring the speeds of said non-driven wheels to produce wheel speed signals VL and VR ; -
determining the difference Δ
V=VL -VR, said difference having a slope;filtering said difference to produce a filtered difference Δ
VF =Δ
V when said slope is less than a predetermined value ±
a, said filtered difference Δ
VF having a slope ±
a when the slope of Δ
V is greater than ±
a;forming a mean value VM =1/2(VL +VR); forming correction signals Ki according to the equations K1 =Δ
VF /VM when VM exceeds a predetermined speed and K2 =(Δ
VF -Δ
VG)/VM when VM is less than or equal to said predetermined speed, Δ
VG being a stored value dependent upon vehicle speed,forming a mean value Ki from successively determined correction signals Ki ; forming a corrected speed difference Δ
VK =Δ
VF -Ki VM, wherein Ki =K1 when K1 was formed at least once during a ride,generating a signal indicative of a curve when Δ
VK exceeds a curve determination speed value, andcontrolling one of brake slippage and drive slippage in said vehicle by using said signal indicative of a curve as a control parameter in a respective one of an antilock brake system and an antislip drive system of the vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
-
9. Method for controlling at least one of brake slippage and drive slippage in a vehicle having two non-driven wheels when said vehicle is driven in a curve, said method comprising
measuring the speeds of said non-driven wheels to produce wheel speed signals VL and VR ; -
determining the difference Δ
V=VL -VR, said difference having a slope;filtering said difference to produce a filtered difference Δ
VF =Δ
V when said slope is less than a predetermined value said filtered difference Δ
VF having a slope ±
a;forming a mean value VM =1/2(VL +VR); forming correction signals Ki according to the equations K1 =Δ
VF /VM exceeds a predetermined speed and K2 =(Δ
VF -Δ
VG)/VM when VM is less than or equal to said predetermined speed, Δ
VG being a stored value dependent upon vehicle speed,forming a mean value Ki from successively determined correction signals Ki ; forming a corrected speed difference Δ
VK =Δ
VF -Ki VM, wherein Ki =K1 when K1 was formed at least once during a ride,determining a transverse vehicle acceleration aq by inputting said corrected speed value Δ
VK and said mean value VM into a unit which stores plots of Δ
VK versus VM for various transverse vehicle accelerations, andcontrolling one of brake slippage and drive slippage in said vehicle by using said transverse acceleration as a control parameter in a respective one of an antilock brake system and an antislip drive system of the vehicle. - View Dependent Claims (10, 11, 12, 13)
-
Specification
-
- Resources
Litigation Campaign Assessment
Thank you for your request. You will receive a custom alert email when the Litigation Campaign Assessment is available.
×
-
Current AssigneeRobert Bosch GmbH
-
Original AssigneeRobert Bosch GmbH
-
InventorsMeissner, Manfred W., Sigl, Alfred
-
Primary Examiner(s)Teska, Kevin J.
-
Assistant Examiner(s)PARK, COLLIN
-
Application NumberUS07/885,920Time in Patent Office211 DaysField of Search364/565, 364/566, 364/424.01, 364/424.05, 364/426.01, 364/426.02, 364/426.03, 364/426.04, 324/160, 324/161, 180/197, 73/495, 73/507US Class Current701/72CPC Class CodesB60G 2400/104 lateral or transversal with...B60G 2400/208 of wheel rotationB60G 2800/24 Steering, corneringB60G 2800/702 Improving accuracy of a sen...G01C 21/22 Plotting boardsG01P 15/00 Measuring acceleration; Mea...
