Vehicle stop control method by using changeable gain

Abstract

The invention relates to a vehicle stop control method by using a changeable gain. The method is characterized by being capable of minimizing jerk generated during a vehicle stop control process by means of mathematical and physical methods to reflect a real condition instead of using a Try-and-Error method; and thus achieving a system soft stop function. Meanwhile, whether the soft stop function can be used or not is judged physically before the function is applied. According to the invention, the jerk generated during an SCC vehicle stop control process can be reduced. Nose dive and Pitch motion can be further suppressed. Incontinuous jerk can be especially reduced. Emotional qualities and commodity performance can be obviously enhanced. Driving comfort can be also increased. Meanwhile, the soft stop function can be mathematically and physically reflected. The method can be systematically used in various vehicles.

Description

technical field [0001] The present invention relates to a vehicle stop control method using variable gains, and more particularly, to a method of controlling vehicle stop by variably selecting gains according to driving conditions. Background technique [0002] The existing smart cruise control system (Smart Cruise Control: hereinafter referred to as SCC) recognizes the situation ahead of the vehicle through radar, controls the engine or the brakes, and maintains the speed of the vehicle and adjusts the inter-vehicle distance without the driver's intervention. [0003] The existing SCC can operate in the range above 30kph, and can provide stop control function while including stop-and-go function. Motion), dive (Nose Dive) and other big jerk (Jerk). [0004] Therefore, even if the existing SCC uses a No Over-Shoot controller, large jerk ( Jerk), and a controller that can theoretically reflect soft braking (Soft Stop) under all driving conditions has not yet been developed,...

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Problems solved by technology

[0004] Therefore, even if the existing SCC uses a No Over-Shoot controller, large jerk ( Jerk), and a controller that can theoretically reflect soft braking (Soft Stop) under all driving conditions has not yet been developed, so it cannot be applied

[0005] That is, existing Stop-and-Go controllers such as String-Stable and Projfile Type controllers stop due to their uncertainty in many driving situations. jerk occurs when the controller is used, and jerk occurs when the vehicle is stopped in many types of vehicles, which brings fatigue and discomfort to the driver, thereby hindering commercialization. The problem

[0006] In addition, Bosch Group (Bosch) reflects the product by quickly reducing the oil pressure of the electronic stability control system (ESC) to reduce the jerk (Jerk) when the vehicle is stopped, but only by reducing the jerk (Jerk) The effect cannot correspond to all driving situations, and BMW (BMW) provides variable controllers in stopping conditions, etc., but does not provide specific methods and results

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