Commercial vehicle all-condition cruise control system

Abstract

The invention discloses an all-condition cruise control system for a commercial vehicle, and the system comprises a road sign recognition system which is used for capturing road sign information, converting the road sign information into road speed limit and distance information, and transmitting the road speed limit and distance information to a whole vehicle CAN network; and the Beidou positioning system is used for receiving the vehicle position information and sending the vehicle position information to the whole vehicle CAN network. The whole vehicle controller is used for controlling the running speed of the vehicle; the motor controller is used for receiving the expected torque information transmitted by the whole vehicle controller, controlling the output of the actual torque of the motor and sending the actual torque information to the whole vehicle CAN network; and the auxiliary brake controller is used for receiving the control of the whole vehicle controller.

Description

Technical Field

[0001] This invention belongs to the field of intelligent assisted driving, specifically relating to a cruise control system for commercial vehicles under all operating conditions. Background Technology

[0002] In recent years, the electrification and intelligentization of automobiles have become increasingly widespread, and the market's acceptance of cruise control systems has also increased. Drivers have placed higher demands on the intelligence of automobiles. Traditional vehicle cruise control systems have a relatively fixed speed, and the speed cannot actively change with changes in road conditions. Drivers need to frequently control the vehicle's speed to meet road requirements, resulting in a poor driving experience. Therefore, traditional cruise control systems can no longer meet customers' needs for driving comfort. Summary of the Invention

[0003] Therefore, the present invention aims to provide a commercial vehicle all-condition cruise control system and device to realize the vehicle's all-condition cruise function, accurately distinguish the driver's required speed and the set speed of road conditions, realize the precise transition of the vehicle's actual speed to the target speed, and improve the customer's demand for driving comfort.

[0004] To address the aforementioned problems in the existing technology, the technical solution adopted by this invention is as follows:

[0005] A commercial vehicle all-condition cruise control system, comprising:

[0006] The road sign recognition system is used to capture road sign information and convert it into road speed limit and distance information, which is then sent to the vehicle's CAN network.

[0007] The BeiDou positioning system is used to receive vehicle location information and send it to the vehicle's CAN network.

[0008] Vehicle controller, used to control vehicle speed;

[0009] The motor controller is used to receive the desired torque information transmitted by the vehicle controller, control the output of the actual torque of the motor, and send the actual torque information to the vehicle CAN network.

[0010] The auxiliary brake controller is used to receive control from the vehicle controller.

[0011] Furthermore, the road sign recognition system includes a road sign recognition controller and a camera; the camera is electrically connected to the road sign recognition controller; the camera is used to capture road sign information and transmit the image to the road sign recognition controller, which converts the received image information into road speed limit and distance information and sends it to the vehicle CAN network.

[0012] Furthermore, the BeiDou positioning system includes a BeiDou positioning controller and an antenna; the BeiDou positioning controller and the antenna are electrically connected; the BeiDou positioning system is used to receive vehicle location information and send its location information to the vehicle's CAN network. When the vehicle speed sensor malfunctions, the vehicle controller calculates the vehicle's actual speed using the location information from the BeiDou positioning system to ensure the cruise control function can operate normally. When the vehicle controller detects that the actual torque of the motor controller is greater than the expected torque, it activates the auxiliary braking controller to reduce torque; when the vehicle controller detects that the actual torque of the motor controller is less than the expected torque, it deactivates the auxiliary braking controller.

[0013] Furthermore, the vehicle controller, motor controller, auxiliary brake controller, Beidou positioning system, and road sign recognition system are interconnected as CAN nodes through the vehicle's CAN network; the vehicle controller is electrically connected to the slope sensor, vehicle speed sensor, and cruise control switch group, which are used to collect information such as the vehicle's tilt angle relative to the horizontal plane, actual vehicle speed, and cruise control set speed.

[0014] Furthermore, the cruise switch group includes a cruise enable switch, a cruise speed increase switch, a cruise speed decrease switch, and a cruise activation switch;

[0015] The cruise enable switch controls whether the cruise function is turned on or off.

[0016] The cruise speed control switch increases the cruise speed.

[0017] The cruise speed reduction switch controls the cruise speed to decrease.

[0018] The cruise activation switch controls the activation of the cruise function after it is turned on.

[0019] Furthermore, the vehicle controller includes an information acquisition unit, a storage unit, a CAN transceiver, and a microprocessor unit, wherein the information acquisition unit, the storage unit, and the CAN transceiver unit are electrically connected to the microprocessor unit;

[0020] The storage unit includes a first storage area and a second storage area. The first storage area is used to store the cruise speed algorithm program, and the second storage area is used to store the power system torque control algorithm program.

[0021] The input terminal of the information acquisition unit is electrically connected to the slope sensor, vehicle speed sensor, and cruise control switch group. The information acquisition unit transmits the collected information on the vehicle's tilt angle relative to the horizontal plane, actual vehicle speed, and cruise control speed setting to the microprocessor unit through the first signal link.

[0022] The output of the CAN transceiver unit is connected to the vehicle's CAN network. The CAN transceiver unit collects road speed limit information, distance information, and vehicle location information through the vehicle's CAN network.

[0023] Furthermore, the vehicle controller also includes a microprocessor unit. The microprocessor unit calls a powertrain torque algorithm program pre-stored in the second area of ​​the storage unit. Based on the current actual vehicle speed V3, the current gradient, the target vehicle speed V4, and the distance information, the microprocessor unit calculates the vehicle's desired torque information and auxiliary braking activation information, thereby achieving speed control of the vehicle. The CAN transceiver unit transmits the desired torque information and auxiliary braking activation information to the vehicle's CAN network via a third signal link.

[0024] The beneficial effects of this invention are as follows: This invention can achieve stable automatic control of cruising speed, with low dependence on driver operation, fast automatic calculation speed, short control process time, and achieve a precise and rapid smooth transition from the actual vehicle speed to the target vehicle speed, thereby improving the comfort of intelligent assisted driving. Attached Figure Description

[0025] Figure 1 This is a structural schematic diagram of a commercial vehicle all-condition cruise control system and device according to the present invention.

[0026] Figure 2 This is a schematic diagram of the hardware structure of an example vehicle controller of the present invention.

[0027] Figure 3 This is a flowchart of the commercial vehicle full-condition cruise control system provided in an embodiment of the present invention. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and reference numerals.

[0029] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0030] The terms “first,” “second,” “third,” etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0031] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0033] Example 1:

[0034] like Figure 1 and 2 As shown, a commercial vehicle all-condition cruise control system includes:

[0035] The road sign recognition system is used to capture road sign information and convert it into road speed limit and distance information, which is then sent to the vehicle's CAN network.

[0036] The BeiDou positioning system is used to receive vehicle location information and send it to the vehicle's CAN network.

[0037] Vehicle controller, used to control vehicle speed;

[0038] The motor controller is used to receive the desired torque information transmitted by the vehicle controller, control the output of the actual torque of the motor, and send the actual torque information to the vehicle CAN network.

[0039] The auxiliary brake controller is used to receive control from the vehicle controller.

[0040] Example 2:

[0041] Based on Embodiment 1, the road sign recognition system includes a road sign recognition controller and a camera; the camera is electrically connected to the road sign recognition controller; the camera is used to capture road sign information and transmit the image to the road sign recognition controller, which converts the received image information into road speed limit and distance information and sends it to the vehicle CAN network.

[0042] Example 3:

[0043] Based on Embodiment 2, the BeiDou positioning system includes a BeiDou positioning controller and an antenna; the BeiDou positioning controller and the antenna are electrically connected; the BeiDou positioning system is used to receive vehicle location information and send the location information to the vehicle's CAN network. When the vehicle speed sensor malfunctions, the vehicle controller calculates the vehicle's actual speed using the location information from the BeiDou positioning system, ensuring that the cruise control function can be used normally.

[0044] When the vehicle controller detects that the actual torque of the motor controller is greater than the expected torque, it controls the auxiliary braking controller to activate and reduce torque; when the vehicle controller detects that the actual torque of the motor controller is less than the expected torque, it controls the auxiliary braking controller to deactivate.

[0045] Example 4:

[0046] Based on Example 3, the vehicle controller, motor controller, auxiliary brake controller, Beidou positioning system, and road sign recognition system are interconnected as CAN nodes through the vehicle CAN network;

[0047] The vehicle controller is electrically connected to the slope sensor, vehicle speed sensor, and cruise control switch group, respectively. The slope sensor, vehicle speed sensor, and cruise control switch group are used to collect the vehicle's tilt angle with the horizontal plane, actual vehicle speed, and cruise control set speed information.

[0048] Example 5:

[0049] Based on Example 1, the cruise switch group includes a cruise enable switch, a cruise speed increase switch, a cruise speed decrease switch, and a cruise activation switch;

[0050] The cruise enable switch controls whether the cruise function is turned on or off.

[0051] The cruise speed control switch increases the cruise speed.

[0052] The cruise speed reduction switch controls the cruise speed to decrease.

[0053] The cruise activation switch controls the activation of the cruise function after it is turned on.

[0054] Example 6:

[0055] Based on Embodiment 5, the vehicle controller includes an information acquisition unit, a storage unit, a CAN transceiver, and a microprocessor unit, wherein the information acquisition unit, the storage unit, the CAN transceiver unit, and the microprocessor unit are electrically connected.

[0056] The storage unit includes a first storage area and a second storage area. The first storage area is used to store the cruise speed algorithm program, and the second storage area is used to store the power system torque control algorithm program.

[0057] The input terminal of the information acquisition unit is electrically connected to the slope sensor, vehicle speed sensor, and cruise control switch group. The information acquisition unit transmits the collected information on the vehicle's tilt angle relative to the horizontal plane, actual vehicle speed, and cruise control speed setting to the microprocessor unit through the first signal link.

[0058] The output of the CAN transceiver unit is connected to the vehicle's CAN network. The CAN transceiver unit collects road speed limit information, distance information, and vehicle location information through the vehicle's CAN network.

[0059] Example 7:

[0060] Based on Example 6, such as Figure 3 As shown, the vehicle controller also includes a microprocessor unit.

[0061] When the cruise control function is activated, the microprocessor unit receives the cruise setting speed V1, road limit speed V2, and actual speed V3 information transmitted by the information acquisition unit and the CAN transceiver unit. It then calls the cruise speed algorithm program pre-stored in the first area of ​​the storage unit. The microprocessor unit performs a minimum operation on the cruise setting speed V1 and the road limit speed V2, records the result as the vehicle target speed V4, and transmits the target speed V4 to the CAN transceiver through the third signal link. The CAN transceiver unit then forwards this information to the vehicle's CAN network.

[0062] The microprocessor unit calls the powertrain torque algorithm program pre-stored in the second area of ​​the storage unit. Based on the current actual vehicle speed V3, the current gradient, the target vehicle speed V4, and the distance information, the microprocessor unit calculates the vehicle's desired torque information and auxiliary braking activation information, thereby achieving speed control of the vehicle. The CAN transceiver unit transmits the desired torque information and auxiliary braking activation information to the vehicle's CAN network via a third signal link.

[0063] Specific working principle:

[0064] When the cruise control function is activated, the microprocessor unit of the vehicle controller receives information such as cruise setting speed V1, road limit speed V2, and actual speed V3 transmitted by the information acquisition unit and the CAN transceiver unit.

[0065] When the vehicle speed sensor malfunctions, the vehicle controller calculates the vehicle's actual speed V3 by collecting location information from the BeiDou positioning system, ensuring that the cruise control function can be used normally.

[0066] The vehicle controller calls the cruise speed algorithm program pre-stored in the first area of ​​the storage unit. The microprocessor unit performs a minimum operation on the cruise setting speed V1 and the road limit speed V2, and records the result as the vehicle target speed V4.

[0067] The vehicle controller calculates the vehicle's desired torque and auxiliary braking activation information based on the current actual vehicle speed V3, the current gradient, the target vehicle speed V4, and the distance to the vehicle. The specific strategy is as described in step S305.

[0068] When the actual vehicle speed V3 is greater than the target vehicle speed V4, the vehicle controller controls the motor controller to reduce the output torque based on the distance information and the current vehicle tilt angle with the horizontal plane, while the auxiliary braking control system is activated to achieve speed reduction and torque reduction. When the actual vehicle speed V3 is less than the target vehicle speed V4, the vehicle controller controls the motor controller to increase the output torque, while the auxiliary braking control system is not activated.

[0069] This invention is not limited to the above-described optional embodiments. Anyone can derive other various forms of products under the guidance of this invention. However, regardless of any changes made in their shape or structure, any technical solution that falls within the scope of the claims of this invention shall be protected by this invention.

Claims

1. A cruise control system for commercial vehicles under all operating conditions, characterized in that, include: The road sign recognition system is used to capture road sign information and convert it into road speed limit and distance information, which is then sent to the vehicle's CAN network. The BeiDou positioning system is used to receive vehicle location information and send it to the vehicle's CAN network. Vehicle controller, used to control vehicle speed; The motor controller is used to receive the desired torque information transmitted by the vehicle controller, control the output of the actual torque of the motor, and send the actual torque information to the vehicle CAN network. The auxiliary brake controller is used to receive control from the vehicle controller.

2. The commercial vehicle all-condition cruise control system according to claim 1, characterized in that, The road sign recognition system includes a road sign recognition controller and a camera. The camera is electrically connected to the road sign recognition controller. The camera is used to capture road sign information and transmit the image to the road sign recognition controller. The road sign recognition controller converts the received image information into road speed limit and distance information and sends it to the vehicle CAN network.

3. The commercial vehicle all-condition cruise control system according to claim 1, characterized in that, The BeiDou positioning system includes a BeiDou positioning controller and an antenna, which are electrically connected. The BeiDou positioning system is used to receive vehicle location information and send the location information to the vehicle's CAN network.

4. The commercial vehicle all-condition cruise control system according to claim 3, characterized in that, The vehicle controller, motor controller, auxiliary brake controller, Beidou positioning system, and road sign recognition system are interconnected as CAN nodes through the vehicle CAN network.

5. The commercial vehicle all-condition cruise control system according to claim 4, characterized in that, The vehicle controller is electrically connected to the slope sensor, vehicle speed sensor, and cruise control switch group, respectively. The slope sensor, vehicle speed sensor, and cruise control switch group are used to collect the vehicle's tilt angle with the horizontal plane, actual vehicle speed, and cruise control set speed information.

6. The commercial vehicle all-condition cruise control system according to claim 5, characterized in that, The cruise switch group includes a cruise enable switch, a cruise speed increase switch, a cruise speed decrease switch, and a cruise activation switch. The cruise enable switch controls whether the cruise function is turned on or off. The cruise speed control switch increases the cruise speed. The cruise speed reduction switch controls the cruise speed to decrease. The cruise activation switch controls the activation of the cruise function after it is turned on.

7. The commercial vehicle all-condition cruise control system according to claim 1, characterized in that, The vehicle controller includes an information acquisition unit, a storage unit, a CAN transceiver, and a microprocessor unit, wherein the information acquisition unit, the storage unit, the CAN transceiver unit, and the microprocessor unit are electrically connected. The storage unit includes a first storage area and a second storage area. The first storage area is used to store the cruise speed algorithm program, and the second storage area is used to store the power system torque control algorithm program. The input terminal of the information acquisition unit is electrically connected to the slope sensor, vehicle speed sensor, and cruise control switch group. The information acquisition unit transmits the collected information on the vehicle's tilt angle relative to the horizontal plane, actual vehicle speed, and cruise control speed setting to the microprocessor unit through the first signal link. The output of the CAN transceiver unit is connected to the vehicle's CAN network. The CAN transceiver unit collects road speed limit information, distance information, and vehicle location information through the vehicle's CAN network.

8. The commercial vehicle all-condition cruise control system according to claim 1, characterized in that, The vehicle controller also includes a microprocessor unit. The microprocessor unit calls the power system pre-stored in the second area of ​​the storage unit. The microprocessor unit calculates the vehicle's desired torque information and auxiliary braking activation information based on the current actual vehicle speed V3, the current slope, the target vehicle speed V4, and the distance information, thereby realizing speed control of the vehicle.

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