Method and appliance for braking a motor vehicle in the immediate vicinity of an obstacle
First Claim
1. Method for braking a motor vehicle at low speeds in order to avoid a collision with an obstacle in its immediate vicinity, the distance (Δ
- s) and the relative speed (Δ
v) between the vehicle and the obstacle being determined by sensor and being based on the calculation of a necessary brake pressure or a deceleration, and the brake pressure being generated at least partially independently of the driver, comprising the steps of;
(1) in the case where the relative speed (Δ
v) is less than a threshold value (vs) and the distance (Δ
s) is less than a proximity limit (SNG), the braking torque (MBr) and the engine torque (MM), which is composed of the engine drive torque and the overrun torque, are adjusted in such a way that both the braking torque (MBr) and the engine torque (MM) are greater than zero, the braking torque (MBr) being smaller than the engine torque (MM); and
(2) in the case where the distance (Δ
s) is less than a stop limit (SSG) which is smaller than the proximity limit (SNG), the braking torque (MBr) and the engine torque (MM) are adjusted in such a way that the braking torque (MBr) exceeds the engine torque (MM).
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Accused Products
Abstract
In a method for braking a motor vehicle at low speeds in order to avoid a collision with an obstacle in its immediate vicinity, the distance and the relative speed between the vehicle and the obstacle are determined by sensor and are based on the calculation of a necessary braking pressure or a deceleration. The brake pressure is generated at least partially independently of the driver. In order to minimize the reaction time in the case of slow approach to an obstacle in the case where the relative speed falls below a threshold value and the distance falls below a proximity limit, the braking torque is set to a smaller value than the engine torque. In the case where the distance falls below a stop limit, which is smaller than the proximity limit, the braking torque and the engine torque are adjusted in such a way that the braking torque exceeds the engine torque.
34 Citations
10 Claims
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1. Method for braking a motor vehicle at low speeds in order to avoid a collision with an obstacle in its immediate vicinity, the distance (Δ
- s) and the relative speed (Δ
v) between the vehicle and the obstacle being determined by sensor and being based on the calculation of a necessary brake pressure or a deceleration, and the brake pressure being generated at least partially independently of the driver, comprising the steps of;(1) in the case where the relative speed (Δ
v) is less than a threshold value (vs) and the distance (Δ
s) is less than a proximity limit (SNG), the braking torque (MBr) and the engine torque (MM), which is composed of the engine drive torque and the overrun torque, are adjusted in such a way that both the braking torque (MBr) and the engine torque (MM) are greater than zero, the braking torque (MBr) being smaller than the engine torque (MM); and
(2) in the case where the distance (Δ
s) is less than a stop limit (SSG) which is smaller than the proximity limit (SNG), the braking torque (MBr) and the engine torque (MM) are adjusted in such a way that the braking torque (MBr) exceeds the engine torque (MM).- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
- s) and the relative speed (Δ
Specification
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- Resources
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Current AssigneeDaimler AG (Mercedes-Benz Group AG)
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Original AssigneeDaimler Chrysler Company LLC (Stellantis NV)
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InventorsKurz, Gerhard, Muller, Armin, Rohrig-Gericke, Thomas, Schob, Reinhold, Troster, Harry
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Primary Examiner(s)NGUYEN, TAN QUANG
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Application NumberUS09/465,625Time in Patent Office501 DaysField of Search701/301, 701/302, 701/96, 701/93, 340/903, 340/435, 340/436US Class Current701/301CPC Class CodesB60T 2201/10 Automatic or semi-automatic...B60T 2230/04 Jerk, soft-stop; Anti-jerk,...B60T 7/22 initiated by contact of veh...
