Multi-axle commercial vehicle brake-by-wire system driver braking intention judgment method based on stroke and pressure signals
A technology of pressure signal and brake-by-wire, which is applied in the direction of brake safety system, brake transmission device, brake, etc., can solve the problems of adjusting QEBS, unreasonable target pressure, etc., and achieve the effect of improving reliability
Active Publication Date: 2022-08-09
WANXIANGQIANCHAO CO LTD +1
View PDF13 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Its assist target calculation depends on the displacement signal. When the displacement signal is abnormal, the calculated integrated brake-by-wire brake system (QEBS, Qianchao Electric Brake System) target pressure is unreasonable. When the displacement signal is not available, QEBS cannot be adjusted according to the driver's pedaling degree. pressure
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0055] Example: as attached Figures 1 to 4 A method for judging the driver's braking intention in a multi-axle commercial vehicle brake-by-wire system based on travel and pressure signals is shown in the appendix. figure 1 , the brake-by-wire system includes a master cylinder 1 driven by a brake pedal 4 , and the master cylinder 1 is connected to the wheel end 3 through a booster module 2 . The connection between the brake pedal 4 and the master cylinder 1 is provided with a first stroke sensor PTS1 and a second stroke sensor PTS1 (such as figure 1 PTS1 / 2 in the middle), the first stroke sensor PTS1 outputs the measured brake pedal 4 stroke signal with PWM, and the second stroke sensor PTS1 outputs the measured brake pedal 4 stroke signal with the SENT protocol. A pressure sensor Ps_MC2 is set in the booster module 2 for measuring the pressure value of the second cavity 5 of the master cylinder 1 , and a pedal simulator 6 is integrated in the booster module 2 . Reference at...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a multi-axle commercial vehicle brake-by-wire system driver braking intention judgment method based on stroke and pressure signals, and relates to the field of brake-by-wire systems, the brake-by-wire system comprises a main cylinder driven by a brake pedal, and the main cylinder is connected to a wheel end through a power assisting module; two stroke sensors PTS1 / 2 and one pressure sensor PsMC2 are integrated in the brake-by-wire system, and under the condition that the working states of the three pressure sensors are uncertain, fault state recognition is carried out firstly; then, according to the signal conditions of different sensors, different QEBS target pressure calculation strategies are adopted, the braking intention of a driver is digitalized into the target braking pressure capable of being calculated, and then the reliability during vehicle running and the pedal feeling under various working conditions are improved.
Description
technical field [0001] The invention relates to the field of brake-by-wire systems, in particular to a method for judging the braking intention of a driver of a multi-axle brake-by-wire system of a commercial vehicle based on travel and pressure signals. Background technique [0002] Brake-by-wire system refers to a braking system that can be controlled by an electronically controlled valve group to achieve braking. Because of its electronically-controlled braking characteristics, the brake-by-wire system is usually used in AEB, ACC, automatic driving, etc. that require active braking instead or A scene to help the driver brake. [0003] Existing brake-by-wire systems are based on the travel sensor signal as a braking target input after the driver brakes the pedal. The calculation of the assist target depends on the displacement signal. When the displacement signal is abnormal, the calculated target pressure of the integrated brake-by-wire system (QEBS, Qianchao Electric Br...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): B60T17/22B60T7/04B60T13/74
CPCB60T17/22B60T7/042B60T13/74
Inventor 刘长运邱宝象任博郑美云段珍珍
Owner WANXIANGQIANCHAO CO LTD