Vane type hydraulic flow deceleration sensor and deceleration method

Abstract

The invention discloses a vane-type hydraulic flow deceleration sensor and a deceleration method. The deceleration sensor comprises a housing, a rotating shaft, a damping plate and a variable resistor are arranged in the housing, the damping plate and the variable resistor are linked, the damping plate rotates under the action of hydraulic pressure, the rotating shaft is connected to the damping plate through a return spring, the variable resistor converts the rotation angle of the damping plate into the rotation arc of the variable resistor, and the damping plate is a vane-type. When the car is running at high speed and braking, the hydraulic oil is compressed to push the damping plate to rotate, when the rotating shaft and the return spring swing, the hydraulic oil passes, and the resistance value of the variable resistor changes. When the damping plate maintains a certain opening, the resistance value of the potentiometer also remains constant, and at this time, its measuring end transmits the signal voltage to the ECU of the ABS. When the set resistance value and pressure value range are reached, the ABS starts anti-lock braking. The invention adopts a combination of a brake pedal, hydraulic oil and an arc-shaped variable resistor to timely and conveniently transmit electrical signals, avoid ABS startup hysteresis, and shorten the startup time.

Description

Technical Field

[0001] The invention relates to a sensor, and in particular to a blade type hydraulic flow deceleration sensor and a deceleration method. Background Art

[0002] At present, the deceleration sensor is mainly used to detect the deceleration of the car during braking, and convert the deceleration into an electrical signal and input it into the anti-lock brake electronic control unit ABSECU to judge the road conditions and take corresponding control measures. In addition, the information generated by the wheel speed sensor is supplemented and corrected to improve the accuracy of controlling the wheel side slip rate. The deceleration sensor can distinguish whether the vehicle is in general deceleration braking or emergency braking. However, the braking linkage of the car is poor, and the ABS cannot be started in time, conveniently and quickly. The ABS starts lagging, which delays the braking start time. Summary of the invention

[0003] Purpose of the invention: The present invention provides a vane-type hydraulic flow deceleration sensor and a deceleration method to solve the technical problems existing in the prior art.

[0004] Technical solution: The blade-type hydraulic flow deceleration sensor of the present invention includes a shell, in which a rotating shaft, a damping plate and a variable resistor are arranged. The damping plate is linked with the variable resistor. The damping plate rotates under the action of hydraulic pressure. The rotating shaft is connected to the damping plate through a return spring. The variable resistor converts the rotation angle of the damping plate into the rotation arc of the variable resistor.

[0005] The blade type hydraulic flow rate deceleration method of the present invention comprises the following steps:

[0006] Step 1: When ABS is not working, the oil inlet pipe is filled with hydraulic oil;

[0007] Step 2: When the car is traveling at high speed and encounters an obstacle, the driver steps on the pedal for emergency braking;

[0008] Step 3: The emergency pedal compresses the hydraulic oil, which acts on the blade-type damping plate through the first one-way valve, pushing the damping plate to rotate;

[0009] Step 4: The blade-type damping plate rotates under pressure, and then the T-shaped shaft rotates, and the side top end also rotates successively;

[0010] Step 5: The rotation of the shaft drives the balance weight on the shaft to rotate and the return spring to twist. The balance weight makes the side tip keep balanced and return, and the return spring returns after being twisted;

[0011] Step 6: The automotive electronic control system collects the potentiometer output resistance, voltage and hydraulic pressure data, and calculates the output with the collected data; when the pressure sensor pressure value change rate increases rapidly and the potentiometer resistance is constant, the ABS brake is activated; otherwise, it is not activated.

[0012] Step 3 includes the following steps:

[0013] Step 3.1: The hydraulic oil enters the main chamber of the housing along with the blade-type damping plate, and then pushes the blade-type damping plate to continue rotating, flows to the secondary chamber of the housing, and then enters the oil tank through the first one-way valve;

[0014] Step 3.2: The pressure sensor transmits the monitored hydraulic oil pressure change rate to the ECU. When the hydraulic oil pressure change rate changes rapidly, the system determines whether the vehicle is in an emergency braking state.

[0015] Working principle: When the car is driving at high speed or encounters emergency braking, the hydraulic oil is compressed to push the blade damping plate to rotate. The pressure sensor detects the hydraulic oil pressure change rate and transmits the detection data to the electronic control system ABSECU. Due to the large inertial swing of the T-shaped shaft and the return spring, the hydraulic oil is compressed to drive the blade damping plate to rotate, the arc variable resistor changes in resistance, and the signal voltage is transmitted to the ABSECU. When the set resistance and pressure value range is reached, the ABS starts anti-lock braking. Specifically, when the force pushing the blade damping plate is balanced with the elastic force of the return spring after deformation, the blade damping plate stops rotating, so that the hydraulic oil enters the main cavity of the housing. The coaxial rotation with the blade damping plate drives the top end of the shaft side to slide. When the blade damping plate is kept at a certain opening, the hydraulic oil will enter the main cavity of the housing, and the resistance value of the potentiometer will also remain constant. At this time, its measuring end will transmit a certain signal voltage to the ABSECU. When the resistance value reaches the set resistance and pressure value range, the ABS starts braking.

[0016] Beneficial effects: The present invention has the following advantages:

[0017] (1) The brake pedal is combined with hydraulic oil and arc-shaped variable resistor to improve the working efficiency of ABS, solve the problem of ABS start-up delay of automobile anti-lock braking system, and effectively improve the braking safety factor.

[0018] (2) By utilizing the linkage of the vehicle's brakes, the electrical signal is transmitted promptly, conveniently and quickly, avoiding the lag in ABS activation and effectively reducing the activation time. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the flow rate deceleration sensor of the present invention;

[0020] Figure 2 It is a partial structural schematic diagram of the flow rate deceleration sensor of the present invention;

[0021] Figure 3 It is a stereoscopic diagram of the flow rate deceleration sensor of the present invention. DETAILED DESCRIPTION

[0022] like Figure 1 As shown, the blade-type hydraulic flow deceleration sensor of the present invention includes a housing 7, a T-shaped rotating shaft 4 is fixed in the housing 7, and a blade-type damping plate 3 is installed on the T-shaped rotating shaft 4; the blade-type damping plate 3 is located inside the housing 7, and rotates under the action of hydraulic oil. A pressure sensor 2 is installed at the junction of the oil inlet 1 and the housing 7 to detect the rate of change of the hydraulic oil pressure. The variable resistor 10 is located in the top of the housing 7, and the variable resistor is an arc-shaped structure. A balancing weight 14 is fixed to the upper end of the rotating shaft, and the weight and the side top end 4-1 rotate with the blade-type damping plate 3; one end of the return spring 13 is fixed to the damping plate T-shaped rotating shaft 4, and the other end is fixed to the gear ring 12; the T-shaped rotating shaft 4 rotates through the variable resistor 10 linked to the blade-type damping plate.

[0023] The top end 4-1 on the T-shaped shaft side is connected to the blade damping plate 3 through the T-shaped shaft 4, the gear ring 12 and the return spring 13, and the first circuit 8-1 and the third circuit 8-3 are connected on both sides of the arc variable resistor 10; the top end 4-1 on the shaft side contacts the arc variable resistor 10 to change the resistance value, and converts the working electrical signal of the ABS into the resistance change of the rotation of the top end 4-1 on the shaft side; the top end 4-1 on the shaft side is coaxially fixed with the T-shaped shaft 4, and the top of the shaft 4 is connected to the second circuit 8-2; a fixed value resistor 9 is connected in series in this circuit to ensure the safety of the circuit. The rotation direction of the blade damping plate 3 is the same as the torsion direction of the return spring 13. The balance weight 14 balances the return.

[0024] The variable resistor 10 is connected to the ECU 11 of the ABS, which converts the rotation angle of the blade damping plate 3 into the rotation of the variable resistor. Through the change of the resistance value of the variable resistor 10, the working electrical signal of the ABS is converted into the potential resistance change of the rotation of the top end 4-1 on the shaft side.

[0025] In this embodiment, the housing 7 is a rectangular parallelepiped, with a length twice the length of the blade damping plate, a width the same as the length of the blade damping plate, and a height twice the height of the blade damping plate. The upper end of the thin pipe is provided with an oil inlet 1 for hydraulic oil, and the oil inlet pipe is installed with a first one-way valve 5-1. The lower end is provided with an oil outlet 6, and the oil outlet pipe is installed with a second one-way valve 5-2. The specific working method of the flow deceleration sensor of the present invention is as follows: after the hydraulic oil is compressed and enters the main chamber 7-1 of the housing, it flows into the secondary chamber 7-2 of the housing, and then is compressed by the blade damping plate 3 to discharge oil, flows through the second one-way valve 5-2 and returns to the oil tank through the oil outlet 6. When the car is running at high speed or braking in an emergency, the hydraulic oil is compressed, and then the blade damping plate 3 is driven to rotate and drive the T-shaped rotating shaft 4 to rotate. Under the action of the hydraulic oil, the return spring 13 is twisted. Due to the large inertial swing of the return spring 13, the hydraulic oil passes through, and the resistance value of the arc variable resistor 10 changes, the voltage changes, and the electrical signal is output. The pressure sensor 2 detects the pressure value change rate and outputs it at the same time. When the blade damping plate 3 is kept at a certain opening, the resistance value of the potentiometer is also kept constant. At this time, its measuring end transmits a certain signal voltage to the ABSECU. When it reaches the set resistance and pressure value range, it transmits an electrical signal to the ABSECU11, and transmits an electrical signal to the ABS to start the anti-lock braking operation. A fixed value resistor 9 is connected in series in the circuit to ensure the circuit safety.

[0026] The present invention adopts a method of combining a brake pedal with hydraulic oil and a variable resistor. The end of the brake pedal is located at the oil inlet. When an emergency occurs, the driver steps on the pedal, and the end of the brake pedal compresses the hydraulic oil to drive the blade damping plate 3 to rotate, thereby causing the top end of the rotating shaft to rotate, changing the resistance value of the arc-shaped variable resistor. When the voltage and pressure values ​​reach the set results, the ABS starts. Specifically, under the action of the hydraulic oil, the blade damping plate 3 is pushed to rotate and enter the main chamber 7-1 of the housing, and then is pushed into the secondary chamber 7-2 of the housing to return oil. At this time, the T-shaped rotating shaft is linked with the variable resistor, and the top end 4-1 of the rotating shaft changes the resistance value and transmits an electrical signal to the ABSECU. When the resistance and pressure value range set by the ABSECU is reached, the ABS starts the anti-lock braking work. When the hydraulic pump is started, the hydraulic oil pressurizes the hydraulic oil flowing back to the reservoir and then delivers it to the accumulator or the oil inlet pipeline. When the hydraulic oil is compressed by the brake pedal again, it is pressurized to push the blade damping plate 3 to rotate, and the hydraulic oil enters the main chamber 7-1 of the housing.

[0027] The blade-type damper plates are made of stainless steel, cast iron, or an alloy consisting of iron, carbon and silicon.

[0028] The arc and size of the variable resistor 10 match the size of the housing and the rotation angle of the T-shaped shaft. The rotation angle θ of the T-shaped shaft satisfies

[0029] like Figure 3 As shown, when the blade damping plate 3 rotates forward along the axis under the thrust of the hydraulic oil, the top end 4-1 on the rotating shaft side linked with the blade damping plate rotates, and the working electrical signal of the ABS is converted into an arc-shaped resistance value change.

[0030] The control method of the vane type hydraulic flow reducer of the present invention comprises the following steps:

[0031] Step 1: ABS does not work, the slip rate of the car's brakes is less than 20%, the car's electronic control system and motor do not work, and the oil inlet pipe is filled with hydraulic oil;

[0032] Step 2: When the car is traveling at high speed, if it encounters an obstacle and needs to dodge or decelerate urgently, the driver steps on the pedal for emergency braking;

[0033] Step 3: The emergency pedal compresses the hydraulic oil, which acts on the blade-type damping plate through the first one-way valve, pushing the damping plate to rotate; the greater the force of stepping on the pedal, the more hydraulic oil enters the housing along with the blade-type damping plate;

[0034] Step 3.1: The hydraulic oil enters the main chamber of the housing along with the blade-type damping plate, and then pushes the blade-type damping plate to continue rotating, flows to the secondary chamber of the housing, and finally enters the oil tank through the one-way valve;

[0035] Step 3.2: The pressure sensor installed at the junction of the oil inlet and the housing is used to monitor the hydraulic oil pressure change rate and transmit the monitoring data to the ECU; when the hydraulic oil flow speeds up and the pressure change rate changes rapidly, the monitoring results and the potentiometer resistance value are transmitted to the ECU, and the system determines whether the car is in an emergency braking state;

[0036] Step 4: The blade-type damping plate rotates under the pressure, and then the shaft rotates, and the side top end also rotates successively; the greater the rotation angle of the shaft damping plate, the greater the arc of rotation of the side top end of the shaft;

[0037] Step 5: The rotation of the shaft and the rotation of the top end of the shaft drive the balance weight fixed on the upper end of the shaft to rotate and the return spring to twist. The balance weight makes the top end of the side keep balanced and return, and the return spring returns after being twisted;

[0038] Step 6: The automotive electronic control system collects the output resistance, voltage and hydraulic pressure data of the potentiometer, and calculates and outputs the collected information; when the pressure value change rate of the pressure sensor increases rapidly and the potentiometer resistance is constant, the ABS brake is activated, otherwise it is not activated.

Claims

1. A vane type hydraulic flow deceleration sensor, Features: The invention comprises a housing (7) and an oil inlet pipeline. The housing is provided with a T-shaped rotating shaft (4), a return spring (13), a damping plate (3), a gear ring (12), a housing main chamber, a housing auxiliary chamber and a variable resistor (10). The damping plate (3) is linked with the variable resistor (10). The damping plate rotates under the action of hydraulic pressure. The T-shaped rotating shaft is connected to the damping plate via the return spring (13). The variable resistor converts the rotation angle of the damping plate into the rotation arc of the variable resistor. The variable resistor (10) is located inside the top of the housing (7), and the variable resistor is an arc-shaped structure; one end of the return spring (13) is fixed on the T-shaped rotating shaft (4), and the other end is fixed on the gear ring (12); the two sides of the variable resistor (10) are connected to the first circuit (8-1) and the third circuit (8-3), the top of the T-shaped rotating shaft (4) is connected to the second circuit (8-2), and a fixed value resistor is connected in series in the second circuit (8-2); The T-shaped rotating shaft (4) comprises a side top end (4-1), and the side top end (4-1) is connected to the damping plate through a gear ring (12) and a return spring (13); the side top end (4-1) contacts a variable resistor (10) to change the resistance value; the variable resistor and the side top end of the T-shaped rotating shaft are connected to a fixed value resistor; and further comprises a balancing weight (14), and the balancing weight is located on the T-shaped rotating shaft; the upper end of the housing is provided with an oil inlet (1), and the lower end is provided with an oil outlet (6); the damping plate is a blade type; The oil inlet (1) is provided with a first one-way valve (5-1); a pressure sensor (2) is provided between the oil inlet (1) and the housing (7); a brake pedal is connected to the oil inlet (1); the end of the brake pedal compresses the hydraulic oil to drive the damping plate to rotate, thereby causing the side tip end of the T-shaped rotating shaft to rotate.

2. A vane-type hydraulic flow rate deceleration method, Features: Using the vane type hydraulic flow deceleration sensor as claimed in claim 1, the method comprises the following steps: Step 1: When ABS is not working, the oil inlet pipe is filled with hydraulic oil; Step 2: When the car is driving at high speed and encounters an obstacle, step on the pedal for emergency braking; Step 3: The emergency pedal compresses the hydraulic oil, which acts on the blade-type damping plate through the first one-way valve (5-1), pushing the damping plate to rotate; Step 4: The blade-type damping plate rotates under pressure, and then the T-shaped shaft rotates, and the side top end also rotates successively; Step 5: The rotation of the shaft drives the balance weight on the shaft to rotate and the return spring to twist. The balance weight makes the side tip keep balanced and return, and the return spring returns after being twisted; Step 6: The automotive electronic control system collects the potentiometer output resistance, voltage and hydraulic pressure data, and calculates the output with the collected data; when the pressure sensor pressure value change rate increases rapidly and the potentiometer resistance is constant, the ABS brake is activated; otherwise, it is not activated.

3. The vane type hydraulic flow rate deceleration method according to claim 2, Features: Step (3) comprises the following steps: Step (3.1): The hydraulic oil enters the main chamber of the housing along with the blade-type damping plate, and then pushes the blade-type damping plate to continue rotating, flows to the secondary chamber of the housing, and then enters the oil tank through the first one-way valve; Step (3.2): The pressure sensor transmits the monitored hydraulic oil pressure change rate to the ECU. When the hydraulic oil pressure change rate changes rapidly, the system determines whether the vehicle is in an emergency braking state.

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