Method for reducing vehicle jerk and vehicle braking device
A vehicle and jerk technology, applied in the direction of braking transmission, brakes, vehicle components, etc., can solve problems such as high jerk, bumps, loss of comfort, etc.
Active Publication Date: 2021-09-10
ZHEJIANG LIBANG HEXIN INTELLIGENT BRAKING SYST CO LTD
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Problems solved by technology
When the vehicle brakes at a constant deceleration, the vehicle's speed decreases continuously, but when the speed reaches 0, the change ends, and the deceleration will suddenly drop from a certain value to 0 in a short period of time, resulting in high jerk , resulting in a loss of comfort
Although experienced drivers can alleviate the jerk by reducing the braking force, in some cases, they may also lose concentration, resulting in severe bumps, and novice drivers cannot avoid the sudden change in speed. The violent turbulence caused by the jerk caused discomfort to passengers
Method used
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Embodiment Construction
[0036] Such as figure 2 and image 3 As shown, a method for reducing vehicle jerk includes the following steps:
[0037] S1. Obtain the actual vehicle speed 100, calculate the actual deceleration 200 and the actual jerk 300 through the actual vehicle speed, the actual deceleration 200 is the derivative of the actual vehicle speed 100, and the actual jerk 300 is the derivative of the actual deceleration 200, by monitoring the driving Determine the driver's required deceleration 203 and required jerk 303, the driver's required deceleration is the deceleration produced by the driver stepping on the brake pedal, and the driver's required jerk 303 is the Derivative of required deceleration 203;
[0038] S2. Under the condition that the actual deceleration 200 is constant, calculate the expected jerk 306 when the vehicle reaches a stationary state;
[0039] S3. Judging whether the expected jerk 306 when the car reaches a stationary state exceeds the jerk limit value 304, if it e...
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The invention discloses a method for reducing vehicle jerk and a vehicle braking device, which belong to the field of vehicle braking. A method for reducing vehicle jerk includes the following steps: obtaining actual vehicle speed, actual deceleration and actual jerk, and passing Monitor the driver's needs to determine the driver's required deceleration and required jerk; when the actual deceleration is constant, calculate the expected jerk for the car to reach a stationary state; determine whether the expected jerk for the car to reach a stationary state is If it exceeds the jerk limit value, then calculate the intervention time point at which the deceleration should be reduced so that the expected jerk is lower than the jerk limit value according to the preset deceleration curve; when the intervention time point is reached , judge whether the jerk required by the driver is between 0 and the preset jerk, if so, adjust the braking pressure of the braking unit according to the preset deceleration curve, and apply the braking torque to the wheel .
Description
technical field [0001] The invention relates to the field of vehicle braking, in particular to a method for reducing vehicle jerk and a vehicle braking device. Background technique [0002] The change of vehicle deceleration with time is called jerk, and the size of jerk has a great influence on driving comfort. When the vehicle brakes at a constant deceleration, the vehicle's speed decreases continuously, but when the speed reaches 0, the change ends, and the deceleration will suddenly drop from a certain value to 0 in a short period of time, resulting in high jerk , resulting in a loss of comfort. Although experienced drivers can alleviate the jerk by reducing the braking force, in some cases, they may also lose concentration, resulting in severe bumps, and novice drivers cannot avoid the sudden change in speed. The violent bumps caused by the resulting jerk will bring discomfort to passengers. Contents of the invention [0003] In view of the technical problems exist...
Claims
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IPC IPC(8): B60T13/74
CPCB60T13/745
Inventor 巴洛赫·莱文特黄明园孙明海
Owner ZHEJIANG LIBANG HEXIN INTELLIGENT BRAKING SYST CO LTD