Energy feedback type multifunctional suspension system

Abstract

The utility model discloses an energy feedback type multifunctional suspension system which comprises a hydraulic system and an electric control part. The hydraulic system comprises a variable oil pump, an oil pressure measuring valve, a two-position four-way valve, a left front oil cylinder control valve, a right front oil cylinder control valve, a left rear oil cylinder control valve, a right rear oil cylinder control valve, a two-position three-way reversing valve, an overflow valve, a first oil return tank, a first bidirectional pump motor, a second bidirectional pump motor, a first energy accumulator, a right rear suspension oil cylinder, a left rear suspension oil cylinder and a right front suspension oil cylinder. A left front suspension oil cylinder, an energy accumulator II, a one-way valve and a filter; the electric control part comprises a controller, and the controller is connected with a vehicle speed sensor, a suspension height sensor, an oil pressure sensor, an accelerator pedal position sensor, a brake pedal position sensor, an oil pressure alarm lamp and a buzzer. According to the system, the suspension can be adjusted according to road conditions and driving working conditions, energy generated in the vibration process of the suspension can be recycled in the driving process, and the riding comfort is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the field of automobile technology, specifically points to a kind of energy-feeding type multifunctional suspension system. BACKGROUND

[0002] Automobile suspension system bears shock absorption, guiding, load bearing and other functions, has great influence on the ride comfort and handling performance of driving. At present, most of automobile suspensions are passive suspensions, cannot adjust the damping and stiffness of suspension in real time according to road conditions and form conditions, so suspension system cannot fully exert its own advantages;Vehicle equipped with active suspension can only adjust limited functions, for example, Chinese patent application No. CN202310640394.6 Multifunctional Suspension Control System (HSS), control method and automobile have off-road mode, anti-roll mode, anti-pitch mode, can improve the comfort and handling performance in driving process, but the system does not solve the problem of energy consumption in suspension vibration process. INVENTION CONTENTS

[0003] The utility model aims at providing a kind of energy-feeding type multifunctional suspension system, the system can adjust suspension according to road conditions, travel condition, can recover the energy generated in suspension vibration process in the process of driving, improve ride comfort.

[0004] To achieve the above object, the utility model feed -energy type multifunctional suspension system, including hydraulic system, electrical control part, the hydraulic system includes variable displacement pump, oil pressure measuring valve, two position four way valve, left front oil cylinder control valve, right front oil cylinder control valve, left rear oil cylinder control valve, right rear oil cylinder control valve, two position three way reversing valve, overflow valve, oil return tank one, two way pump motor one, two way pump motor two, energy accumulator one, right rear suspension oil cylinder, left rear suspension oil cylinder, right front suspension oil cylinder, left front suspension oil cylinder, energy accumulator two, check valve, filter, the upper end of variable displacement pump is connected with energy accumulator two, two position four way valve's A interface respectively through filter, check valve in proper order, two position four way valve's P interface is connected with oil pressure measuring valve, left front oil cylinder control valve's P interface, right front oil cylinder control valve's P interface, left rear oil cylinder control valve's P interface, right rear oil cylinder control valve's P interface, two position three way reversing valve's P interface respectively, two position four way valve's B interface oil return tank two, two position four way valve's T interface is connected with left front oil cylinder control valve's T interface, right front oil cylinder control valve's T interface, left rear oil cylinder control valve's T interface, right rear oil cylinder control valve's T interface, two position three way reversing valve's T interface respectively, left front oil cylinder control valve's A interface is connected with one end of left front suspension oil cylinder, and the other end of left front suspension oil cylinder is connected with left front oil cylinder control valve's B interface, right front oil cylinder control valve's A interface is connected with one end of right front suspension oil cylinder, and the other end of right front suspension oil cylinder is connected with right front oil cylinder control valve's B interface, left rear oil cylinder control valve's A interface is connected with one end of left rear suspension oil cylinder, and the other end of left rear suspension oil cylinder is connected with left rear oil cylinder control valve's B interface, right rear oil cylinder control valve's A interface is connected with one end of right rear suspension oil cylinder, and the other end of right rear suspension oil cylinder is connected with right rear oil cylinder control valve's B interface, two position three way reversing valve's A interface is connected with overflow valve's P interface in one way, and the other way is connected with two way pump motor one, two way pump motor two, energy accumulator one in proper order,

[0005] The electrical control part includes a controller, and the controller is connected with a vehicle speed sensor, a suspension height sensor, an oil pressure sensor, an accelerator pedal position sensor, a brake pedal position sensor, an oil pressure alarm lamp and a buzzer, wherein the suspension height sensor includes a left front suspension height sensor, a right front suspension height sensor, a left rear suspension height sensor and a right rear suspension height sensor.

[0006] As a further scheme of the utility model: two position four way valve, left front oil cylinder control valve, right front oil cylinder control valve left rear oil cylinder control valve, right rear oil cylinder control valve, two position three way reversing valve are solenoid valve YA0, YA1, YA2, YA3, YA4, YA5 respectively;

[0007] The A0 to A7 interfaces of the controller are connected with one end of a brake pedal position sensor, an accelerator pedal position sensor, an oil pressure sensor, a right rear suspension height sensor, a left rear suspension height sensor, a right front suspension height sensor, a left front suspension height sensor and a vehicle speed sensor respectively; the second end of each sensor is connected with the 5V interface of the controller; the third end of each sensor is connected with the GND interface of the controller; one end of a 12V power supply voltage is connected with the GND interface, and the other end is connected with the main circuit switch of the relay KA0, KA1, KA2, KA3, KA4 and KA5 through a current limiting resistor; the other end of the main circuit switch of the relay KA0, KA1, KA2, KA3, KA4 and KA5 is connected with the electromagnetic valve YA0, YA1, YA2, YA3, YA4 and YA5 respectively; the other end of the electromagnetic valve YA0, YA1, YA2, YA3, YA4 and YA5 is grounded; one end of the control coil of the relay KA0, KA1, KA2, KA3, KA4 and KA5 is connected with the B4, PB5, PB6, PB7, PB8 and PB9 interface of the controller respectively, and the other end is grounded; one end of the buzzer is connected with the B15 interface of the controller, and the other end is grounded; one end of the oil pressure alarm lamp is connected with the B15 interface of the controller, and the other end is grounded.

[0008] As a further scheme of the utility model: the suspension height sensor is installed at the top of four suspensions respectively, and monitors the height change of the four suspensions; the oil pressure sensor is used for monitoring the oil pressure of the hydraulic system; the accelerator pedal position sensor is installed inside the accelerator pedal, and adopts a Hall type position sensor; the brake pedal position sensor is installed inside the brake pedal, and adopts a Hall type position sensor.

[0009] As a further scheme of the utility model: the four suspension oil cylinders are bidirectional action oil cylinders.

[0010] As a further scheme of the utility model: the model of the controller is STM32F103C8T6.

[0011] As a further scheme of the utility model: the working mode of the energy feedback type multifunctional suspension system includes: chassis lowering process, chassis lifting process, anti-dive mode, anti-back pitch mode, anti-roll mode, energy recovery mode and energy release mode.

[0012] Compared with the prior art, the utility model discloses four suspension oil cylinders in parallel, thereby when the vibration of one suspension appears, four suspension oil cylinders can work simultaneously, effectively reduce the time length and frequency of vehicle vibration, make the vehicle restore to the stable state quickly, improve the riding comfort feeling, the system can automatically detect the driving intention of the driver under various working modes, thereby automatically adjust the suspension oil cylinder, effectively reduce the pitch impact brought by the braking process and acceleration process, improve the driving comfort, can adjust according to the vehicle state in the steering process, thereby reduce the roll feeling brought by the steering process, improve the driving comfort, adopt bidirectional motor one, bidirectional motor two, energy storage device one, energy storage device two to carry out the energy recovery and release, can realize the energy recovery in the vehicle vibration process. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is hydraulic system structure schematic diagram in the utility model.

[0014] Figure 2 It is electrical control part circuit diagram in the utility model.

[0015] Figure 3 It is hydraulic schematic diagram in the utility model during chassis lowering process.

[0016] Figure 4 It is hydraulic schematic diagram in the utility model during chassis lifting process.

[0017] Figure 5 It is hydraulic schematic diagram of anti-dive mode in the utility model.

[0018] Figure 6 It is hydraulic schematic diagram of anti-back pitch mode in the utility model.

[0019] Figure 7 It is hydraulic schematic diagram of anti-left roll mode in the utility model.

[0020] Figure 8 It is hydraulic schematic diagram of anti-right roll mode in the utility model.

[0021] Figure 9 It is hydraulic schematic diagram of vibration energy recovery mode in the utility model.

[0022] In the figure: 1, variable oil pump, 2, oil pressure measuring valve, 3, two-position four-way valve, 4, left front oil cylinder control valve, 5, right front oil cylinder control valve, 6, left rear oil cylinder control valve, 7, right rear oil cylinder control valve, 8, two-position three-way reversing valve, 9, overflow valve, 10, oil return tank one, 11, bidirectional pump motor one, 12, bidirectional pump motor two, 13, accumulator one, 14, right rear suspension oil cylinder, 15, left rear suspension oil cylinder, 16, right front suspension oil cylinder, 17, left front suspension oil cylinder, 18, accumulator two, 19, check valve, 20, filter, 21, oil return tank two, 22, vehicle speed sensor, 23, left front suspension height sensor, 24, right front suspension height sensor, 25, left rear suspension height sensor, 26, right rear suspension height sensor, 27, oil pressure sensor, 28, accelerator pedal position sensor, 29, brake pedal position sensor, 30, oil pressure alarm lamp, 31, buzzer. DETAILED DESCRIPTION

[0023] The utility model will be further described below in connection with the drawings.

[0024] Energy-feeding multifunctional suspension system, including hydraulic system, electrical and electrical control part, such as Figure 1As shown in the figure, the hydraulic system comprises a variable oil pump 1, an oil pressure measuring valve 2, a two-position four-way valve 3, a left front oil cylinder control valve 4, a right front oil cylinder control valve 5, a left rear oil cylinder control valve 6, a right rear oil cylinder control valve 7, a two-position three-way reversing valve 8, an overflow valve 9, an oil return tank 10, a bidirectional pump motor 1 1, a bidirectional pump motor 2 12, an accumulator 1 13, a right rear suspension oil cylinder 14, a left rear suspension oil cylinder 15, a right front suspension oil cylinder 16, a left front suspension oil cylinder 17, an accumulator 2 18, a check valve 19, a filter 20; the upper end of the variable oil pump 1 is connected to the accumulator 2 18 and the A interface of the two-position four-way valve 3 through the filter 20 and the check valve 19 respectively; the P interface of the two-position four-way valve 3 is connected to the oil pressure measuring valve 2, the P interface of the left front oil cylinder control valve 4, the P interface of the right front oil cylinder control valve 5, the P interface of the left rear oil cylinder control valve 6, the P interface of the right rear oil cylinder control valve 7 and the P interface of the two-position three-way reversing valve 8 respectively, the B interface of the two-position four-way valve 3 is connected to the oil return tank 2 21, and the T interface of the two-position four-way valve 3 is connected to the T interface of the left front oil cylinder control valve 4, the T interface of the right front oil cylinder control valve 5, the T interface of the left rear oil cylinder control valve 6, the T interface of the right rear oil cylinder control valve 7 and the T interface of the two-position three-way reversing valve 8 respectively; the A interface of the left front oil cylinder control valve 4 is connected to one end of the left front suspension oil cylinder 17, and the other end of the left front suspension oil cylinder 17 is connected to the B interface of the left front oil cylinder control valve 4; the A interface of the right front oil cylinder control valve 5 is connected to one end of the right front suspension oil cylinder 16, and the other end of the right front suspension oil cylinder 16 is connected to the B interface of the right front oil cylinder control valve 5; the A interface of the left rear oil cylinder control valve 6 is connected to one end of the left rear suspension oil cylinder 15, and the other end of the left rear suspension oil cylinder 15 is connected to the B interface of the left rear oil cylinder control valve 6; the A interface of the right rear oil cylinder control valve 7 is connected to one end of the right rear suspension oil cylinder 14, and the other end of the right rear suspension oil cylinder 14 is connected to the B interface of the right rear oil cylinder control valve 7; the A interface of the two-position three-way reversing valve 8 is connected to the P interface of the overflow valve 9 in one way, and connected to the bidirectional pump motor 1 1, the bidirectional pump motor 2 12 and the accumulator 1 13 in the other way;

[0025] The two-position four-way valve 3, the left front oil cylinder control valve 4, the right front oil cylinder control valve 5, the left rear oil cylinder control valve 6, the right rear oil cylinder control valve 7 and the two-position three-way reversing valve 8 are electromagnetic valves YA0, YA1, YA2, YA3, YA4 and YA5 respectively;

[0026] As shown in the figure, Figure 2 The electrical control part comprises a controller, and the controller is connected with a vehicle speed sensor 22, suspension height sensors, an oil pressure sensor 27, an accelerator pedal position sensor 28, a brake pedal position sensor 29, an oil pressure alarm lamp 30 and a buzzer 31 respectively, wherein the suspension height sensors comprise a left front suspension height sensor 23, a right front suspension height sensor 24, a left rear suspension height sensor 25 and a right rear suspension height sensor 26;

[0027] The model of the controller is STM32F103C8T6, the A0 to A7 interfaces of the controller are respectively connected with one end of the brake pedal position sensor 29, the accelerator pedal position sensor 28, the oil pressure sensor 27, the right rear suspension height sensor 26, the left rear suspension height sensor 25, the right front suspension height sensor 24, the left front suspension height sensor 23 and the vehicle speed sensor 22; the second end of each sensor is connected with the 5V interface of the controller; the third end of each sensor is connected with the GND interface of the controller, one end of the 12V power supply voltage is connected with the GND interface, the other end is connected with the main circuit switch of the relay KA0, KA1, KA2, KA3, KA4 and KA5 through a current limiting resistor, the other end of the main circuit switch of the relay KA0, KA1, KA2, KA3, KA4 and KA5 is connected with the electromagnetic valve YA0, YA1, YA2, YA3, YA4 and YA5 respectively; the other end of the electromagnetic valve YA0, YA1, YA2, YA3, YA4 and YA5 is grounded; one end of the control coil of the relay KA0, KA1, KA2, KA3, KA4 and KA5 is respectively connected with the B4, PB5, PB6, PB7, PB8 and PB9 interfaces of the controller, and the other end is grounded; one end of the buzzer 31 is connected with the B15 interface of the controller, and the other end is grounded; one end of the oil pressure alarm lamp 30 is connected with the B15 interface of the controller, and the other end is grounded.

[0028] The suspension height sensors are respectively installed at the top of the four suspensions to monitor the height change of the four suspensions; the oil pressure sensor 27 is used to monitor the oil pressure of the hydraulic system; the accelerator pedal position sensor 28 is installed inside the accelerator pedal and adopts a Hall type position sensor; the brake pedal position sensor 29 is installed inside the brake pedal and adopts a Hall type position sensor.

[0029] The four suspension cylinders are double-acting cylinders.

[0030] The working modes of the energy feedback type multifunctional suspension system include the following modes.

[0031] 1. Chassis lowering process

[0032] When the driver holds a legal key into the search range of the car, the controller receives the legal identity information of the key from the anti-theft system, and then supplies power to the relays KA0, KA1, KA2, KA3, KA4 and KA5 through the B4, PB5, PB6, PB7, PB8 and PB9 interfaces, respectively. Then the above-mentioned five relays are turned on to control the main circuit of the relays to be turned on, and the solenoid valves YA0, YA1, YA2, YA3, YA4 and YA5 powered by the 12V power supply are turned on to make the hydraulic system loop be turned on, so that the four suspension cylinders (the left front suspension cylinder 17, the right front suspension cylinder 16, the left rear suspension cylinder 15 and the right rear suspension cylinder 14) are lowered by 15-20mm (different models can be set to different lowering data) at the same time, thereby facilitating the driver and passenger to get on the car. When the door is closed and the engine is started, the controller will cut off the power supply of the relays KA1, KA2, KA3 and KA4, so that the four suspension heights of the hydraulic system return to the preset height. When the chassis height reaches the preset height, the controller will cut off the power supply of the B4, PB5, PB6, PB7, PB8 and PB9 interfaces, at which time the hydraulic system is in a pressure maintaining state, maintaining the existing chassis height, and the relays KA0 and KA5 are disconnected, and the solenoid valves YA0 and YA5 return to the original position, and the system is pressure maintained.

[0033] In addition, when driving, if the vehicle speed sensor 22 monitors that the vehicle speed is higher than a certain threshold (such as the high-speed driving speed exceeding 100Km / h), the vehicle speed sensor 22 will transmit the vehicle speed signal to the controller through the A7 interface of the controller. After judging that the vehicle speed exceeds the preset threshold, the controller supplies power to the relays KA0, KA1, KA2, KA3, KA4 and KA5 through the B4, PB5, PB6, PB7, PB8 and PB9 interfaces, respectively. Then the above-mentioned five relays are turned on to control the main circuit of the relays to be turned on, and the solenoid valves YA0, YA1, YA2, YA3, YA4 and YA5 powered by the 12V power supply are turned on to make the hydraulic system loop be turned on, so that the four suspension cylinders are lowered by 15-20mm (different models can be set to different lowering data) at the same time, and the chassis height is lowered to the preset height. After that, the controller cuts off the power supply of the B4, PB5, PB6, PB7, PB8 and PB9 interfaces, at which time the hydraulic system is in a pressure maintaining state, maintaining the existing chassis height, and the relays KA0 and KA5 are disconnected, and the solenoid valves YA0 and YA5 return to the original position, and the system is pressure maintained, as shown in FIG. 2. Figure 3

[0034] 2. Chassis lifting process

[0035] ​When the road condition is poor, the change amount of the data measured by the four suspension height sensors (left front suspension height sensor 23, right front suspension height sensor 24, left rear suspension height sensor 25, right rear suspension height sensor 26) will exceed a certain threshold, and these data will be transmitted to the controller through the A6, A5, A4, A3 interfaces of the controller, respectively. The controller will make a judgment according to the data. When the data change amount exceeds a certain threshold, the controller will supply power to the relays KA0 and KA5 through the B4 and PB9 interfaces, respectively. Then the above two relays are turned on to control the relay main circuit to be turned on, and the solenoid valves YA0 and YA5 supplied by the 12V power supply are turned on to make the hydraulic system loop connected, and the four suspension cylinders are raised by 15-20mm (different models can be set to different rising data) at the same time. After the chassis height is raised to the preset height, the controller will cut off the power supply of B4 and PB9. At this time, the hydraulic system is in a pressure maintaining state, maintaining the existing chassis height, and the relays KA0 and KA5 are disconnected, and the solenoid valves YA0 and YA5 return to the original position, and the system is pressure maintained, as shown in Figure 4

[0036] 3. Anti-dive mode

[0037] When the driver steps on the brake pedal, the brake pedal position sensor 29 will transmit a signal to the controller through the A0 interface. According to the data of the brake pedal position sensor 29, the controller supplies power to the relays KA0, KA3, KA4, KA5, and the relays are attracted to control the relay main circuit to be turned on, and the solenoid valves YA0, YA3, YA4, YA5 are powered on. At this time, the high-pressure oil in the accumulator two 18 will supply high-pressure oil to the upper chamber of the left rear suspension cylinder 15 and the right rear suspension cylinder 14, and supply high-pressure oil to the lower chamber of the left front suspension cylinder 17 and the right front suspension cylinder 16. Therefore, the two front suspension cylinders of the vehicle are raised, and the two rear suspension cylinders are lowered, and the pressure difference between the front and rear suspension cylinders offsets the forward diving caused by braking, improving the ride comfort of the vehicle. When the driver releases the brake pedal, according to the signals of the four suspension height sensors, the controller will control the relays KA1 and KA2 to be connected, and KA3 and KA4 to be disconnected. Then the hydraulic system will supply high-pressure oil to the upper chambers of the two front suspension cylinders and the lower chambers of the two rear suspension cylinders. At this time, the front and rear suspensions respectively return to the normal form state, the relays KA0 and KA5 are disconnected, the solenoid valves YA0 and YA5 return to the original position, and the system is pressure maintained, as shown in Figure 5

[0038] 4. Anti-dive mode

[0039] ​​When the driver steps on the accelerator pedal, the accelerator pedal position sensor 28 will send a signal to the controller through the Al interface, and the controller will supply power to the relays KA0, KA1, KA2, KA5 according to the data of the accelerator pedal position sensor 28. The main circuit is turned on by the attraction of the relays, and the solenoid valves YA0, YA1, YA2, YA5 are powered to act. At this time, high-pressure oil is supplied to the left front suspension oil cylinder 17 and the right front suspension oil cylinder 16, and high-pressure oil is supplied to the left rear suspension oil cylinder 15 and the right rear suspension oil cylinder 14. Therefore, the two front suspension oil cylinders of the vehicle are lowered, and the two rear suspension oil cylinders are raised. The pressure difference between the front and rear suspension oil cylinders offsets the rear tilting caused by acceleration, improving the comfort of the vehicle. When the driver releases the accelerator pedal, according to the signals of the four suspension height sensors, the controller controls the relays KA3, KA4 to be combined and KA1, KA2 to be disconnected. The hydraulic system will then supply high-pressure oil to the lower chambers of the two front suspension oil cylinders and the upper chambers of the two rear suspension oil cylinders. At this time, the front and rear suspensions return to the normal state, the relays KA0 and KA5 are disconnected, the solenoid valves YA0 and YA5 return to their original positions, and the system is pressure- maintained, as shown in Figure 6

[0040] 5. Anti-roll mode

[0041] When the vehicle turns, take left turn as an example. When turning left, the front and rear suspensions on the left side of the vehicle will lower, causing the vehicle body to tilt, affecting driving safety and ride comfort. When the left front suspension height sensor 23 and the left rear suspension height sensor 25 detect that the suspension height has decreased, they will send signals to the controller through the A6 and A4 interfaces of the controller, respectively. When the vehicle tilts to the left, the controller supplies power to the relays KA0, KA2, KA4, KA5 through the B4, PB6, PB8, and PB9 interfaces, respectively. The above four relays turn on the main circuit, and the YA2 and YA4 solenoid valves are powered to reverse direction. At this time, high-pressure oil is supplied to the lower chambers of the left front suspension oil cylinder 17 and the left rear suspension oil cylinder 15, and the upper chambers of the right front suspension oil cylinder 16 and the right rear suspension oil cylinder 14. The two suspension oil cylinders on the left side of the vehicle are raised, and the two suspension oil cylinders on the right side are lowered. The resulting pressure difference in the oil cylinders will offset the tilting caused by turning, improving safety and ride comfort. When the driver releases the steering wheel, the vehicle turns off, and according to the signals of the four suspension height sensors, the controller controls the relays KA1, KA3 to be combined and KA2, KA4 to be disconnected. The hydraulic system will then supply high-pressure oil to the lower chambers of the two left suspension oil cylinders and the upper chambers of the two right suspension oil cylinders. At this time, the front and rear suspensions return to the normal state, KA0 and KA5 are disconnected, YA0 and YA5 solenoid valves return to their original positions, and the system is pressure- maintained, as shown in Figure 7 ​When the vehicle turns right, solenoid valves YA1 and YA3 are powered, the left two suspension cylinders are lowered, and the right two suspension cylinders are raised, thus the pressure difference of the cylinders can offset the roll caused by the turning process, improving safety and ride comfort, as shown in Figure 8 . .

[0042] 6. Energy recovery mode

[0043] When the vehicle is running normally, if a wheel (or several wheels, such as through the shock strip) encounters an obstacle, due to the impact of the obstacle, the wheel will move upward, the cylinder piston will move upward, the upper chamber volume will decrease, and the high-pressure oil will flow through the two-way pump motor one 11 and the two-way pump motor two 12 through the two-position three-way reversing valve 8. At this time, the two-way pump motor one 11 becomes a hydraulic motor, and due to the impact of the incoming high-pressure oil, since the shafts of the two-way pump motor one 11 and the two-way pump motor two 12 are connected as a whole, when the two-way pump motor one 11 rotates, it will drive the two-way pump motor two 12 to rotate through the output shaft. At this time, the two-way pump motor two 12 becomes a hydraulic pump, which further pressurizes the incoming hydraulic oil and stores it in the accumulator 18, thereby collecting the energy of the vehicle vibration and converting it into the pressure energy of the accumulator two 18. At the same time, since the four suspension cylinders are connected in parallel, when one wheel is impacted, the other suspension cylinders will also participate, thereby the interconnected suspension during driving reduces the time of wheel vibration and allows the vehicle to quickly recover to normal driving, improving ride comfort, as shown in Figure 9 .

[0044] 7. Energy release mode

[0045] When the vehicle is running, when the chassis height needs to be adjusted (mode 1, mode 2) or when the vehicle is accelerating or decelerating (mode 3, mode 4) or when the vehicle is turning (mode 5), the controller controls the relay KA0 and the relay KA5 to be turned on through the B4 interface and the PB9 interface respectively, so that the electromagnetic valves YA0 and YA5 are reversed. At this time, the bidirectional pump motor two 12 becomes a hydraulic motor, and the high-pressure oil from the accumulator one 13 impacts the bidirectional pump motor two 12 to rotate. Since the bidirectional pump motor one 11 and the bidirectional pump motor two 12 are coaxially connected, when the bidirectional pump motor two 12 rotates, it will drive the bidirectional pump motor one 11 to rotate. At this time, the bidirectional pump motor one 11 becomes a hydraulic pump, pressurizes the hydraulic oil and sends it into the hydraulic system, helping the variable oil pump 1 to complete the functions of lifting, lowering, anti-roll and anti-pitch of the chassis, thereby reducing the power requirement of the variable oil pump 1 and reducing energy consumption. At the same time, the bidirectional pump motor one 11 and the bidirectional pump motor two 12 can be adjusted twice to maintain the T port pressure of the two-position four-way valve 3 at a constant value, so that the pressure difference between the inlet and outlet ends is maintained at a small constant value, thereby reducing the throttling loss of the proportional valve, increasing the energy entering the secondary regulation unit, and improving the utilization rate of vibration energy.

[0046] When the oil pressure measuring valve 2 detects that the oil pressure of the hydraulic system is lower than the threshold value, the signal is transmitted to the controller through the A2 port of the controller. The controller lights up the oil pressure alarm lamp and the buzzer through the B14 and B15 terminal points, so as to remind the driver to repair in time.

Claims

1. A multi-functional suspension system of the regenerative type, comprising a hydraulic system, an electrically controlled part, characterized in that, The hydraulic system comprises a variable oil pump (1), an oil pressure measuring valve (2), a two-position four-way valve (3), a left front oil cylinder control valve (4), a right front oil cylinder control valve (5), a left rear oil cylinder control valve (6), a right rear oil cylinder control valve (7), a two-position three-way reversing valve (8), an overflow valve (9), an oil return tank (10), a bidirectional pump motor (11), a bidirectional pump motor (12), an accumulator (13), a right rear suspension oil cylinder (14), a left rear suspension oil cylinder (15), a right front suspension oil cylinder (16), a left front suspension oil cylinder (17), an accumulator (18), a check valve (19), a filter (20); the upper end of the variable oil pump (1) is connected with the accumulator (18), the two-position four-way valve (3) and the filter (20) in sequence through the check valve (19); the P interface of the two-position four-way valve (3) is connected with the oil pressure measuring valve (2), the P interface of the left front oil cylinder control valve (4), the P interface of the right front oil cylinder control valve (5), the P interface of the left rear oil cylinder control valve (6), the P interface of the right rear oil cylinder control valve (7) and the P interface of the two-position three-way reversing valve (8); the B interface of the two-position four-way valve (3) is connected with the oil return tank (21); the T interface of the two-position four-way valve (3) is connected with the T interface of the left front oil cylinder control valve (4), the T interface of the right front oil cylinder control valve (5), the T interface of the left rear oil cylinder control valve (6), the T interface of the right rear oil cylinder control valve (7) and the T interface of the two-position three-way reversing valve (8); the A interface of the left front oil cylinder control valve (4) is connected with one end of the left front suspension oil cylinder (17); the other end of the left front suspension oil cylinder (17) is connected with the B interface of the left front oil cylinder control valve (4); the A interface of the right front oil cylinder control valve (5) is connected with one end of the right front suspension oil cylinder (16); the other end of the right front suspension oil cylinder (16) is connected with the B interface of the right front oil cylinder control valve (5); the A interface of the left rear oil cylinder control valve (6) is connected with one end of the left rear suspension oil cylinder (15); the other end of the left rear suspension oil cylinder (15) is connected with the B interface of the left rear oil cylinder control valve (6); the A interface of the right rear oil cylinder control valve (7) is connected with one end of the right rear suspension oil cylinder (14); the other end of the right rear suspension oil cylinder (14) is connected with the B interface of the right rear oil cylinder control valve (7); the A interface of the two-position three-way reversing valve (8) is connected with the P interface of the overflow valve (9) in one way and connected with the bidirectional pump motor (11), the bidirectional pump motor (12) and the accumulator (13) in sequence in the other way. The electrical control part comprises a controller; the controller is connected with a vehicle speed sensor (22), a suspension height sensor, an oil pressure sensor (27), an accelerator pedal position sensor (28), a brake pedal position sensor (29), an oil pressure alarm lamp (30) and a buzzer (31); the suspension height sensor comprises a left front suspension height sensor (23), a right front suspension height sensor (24), a left rear suspension height sensor (25) and a right rear suspension height sensor (26).

2. The energy regenerative suspension system according to claim 1, wherein The two-position four-way valve (3), the left front oil cylinder control valve (4), the right front oil cylinder control valve (5), the left rear oil cylinder control valve (6), the right rear oil cylinder control valve (7) and the two-position three-way reversing valve (8) are solenoid valves YA0, YA1, YA2, YA3, YA4 and YA5 respectively. The A0 to A7 interfaces of the controller are connected to one end of the brake pedal position sensor (29), the accelerator pedal position sensor (28), the oil pressure sensor (27), the right rear suspension height sensor (26), the left rear suspension height sensor (25), the right front suspension height sensor (24), the left front suspension height sensor (23) and the vehicle speed sensor (22) respectively; the second end of each sensor is connected to the 5V interface of the controller; the third end of each sensor is connected to the GND interface of the controller, one end of the 12V power supply voltage is connected to the GND interface, the other end is connected to the main circuit switch of the relay KA0, KA1, KA2, KA3, KA4 and KA5 through a current limiting resistor, the other end of the main circuit switch of the relay KA0, KA1, KA2, KA3, KA4 and KA5 is connected to the solenoid valve YA0, YA1, YA2, YA3, YA4 and YA5 respectively; the other end of the solenoid valve YA0, YA1, YA2, YA3, YA4 and YA5 is grounded; one end of the control coil of the relay KA0, KA1, KA2, KA3, KA4 and KA5 is connected to the B4, PB5, PB6, PB7, PB8 and PB9 interfaces of the controller respectively, and the other end is grounded; one end of the buzzer (31) is connected to the B15 interface of the controller, and the other end is grounded; one end of the oil pressure alarm lamp (30) is connected to the B15 interface of the controller, and the other end is grounded.

3. The energy feeding multifunctional suspension system according to claim 1 or 2, characterized in that, The suspension height sensors are installed at the top of the four suspensions to monitor the height change of the four suspensions; the oil pressure sensor (27) is used to monitor the oil pressure of the hydraulic system; the accelerator pedal position sensor (28) is installed inside the accelerator pedal and uses a Hall type position sensor; the brake pedal position sensor (29) is installed inside the brake pedal and uses a Hall type position sensor.

4. The energy regenerative suspension system of claim 1, wherein, The four suspension cylinders are double-acting cylinders.

5. The energy feeding multifunctional suspension system according to claim 1 or 2, characterized by, The model of the controller is STM32F103C8T6.

6. The energy regenerative suspension system of claim 1, wherein, The working modes of the energy feedback type multifunctional suspension system include: chassis lowering process, chassis lifting process, anti-dive mode, anti-backflip mode, anti-roll mode, energy recovery mode and energy release mode.

Images