TWI672236B - Three-wheel vehicle differential steering system - Google Patents

Abstract

The invention discloses a tricycle differential steering system, which comprises: an acceleration sensor, a control module, a hydraulic modulation module, an actuator, a first brake module, and a second brake module. According to the design of the present invention, when the acceleration sensor detects a left-wheeled vehicle turning left, the control module controls the actuator, so that a left hydraulic modulation unit and the first brake module are made. A first action. Similarly, when the acceleration sensor detects that the three-wheeled vehicle is turning right, the control module controls the actuator, so that a right hydraulic modulation unit and the second brake module perform a second action. . Therefore, the three-wheeled vehicle increases the bending rate of the three-wheeled vehicle by the intervention of the brake module to improve the operation capability of the three-wheeled vehicle.

Description

Tricycle differential steering system

The present invention relates to the related field of a vehicle differential steering device, and more particularly to a tricycle differential steering system.

In a conventional brake system, a fluid pressure generated by a master pump and a hydraulic brake device is controlled by a brake pedal, and at the same time, a generated base fluid pressure is distributed to the wheel through a sub-pump, wherein The sub-pump is coupled to the main pump through a fluid passage having a fluid pressure control valve for causing a base hydraulic braking force on the wheel corresponding to the base fluid pressure. Thus, when stepping on the brake pedal, the basic hydraulic braking force generation limiting means limits the generation of the basic hydraulic braking force to be equal to or less than a predetermined value until the braking manipulation state is from the stepping start state at the time point of the stepping start Change to the predetermined state. Thus, when the driver steps on the brake pedal, the basic hydraulic braking force is forcibly restricted from the stepping start state to be equal to or smaller than a predetermined value until the predetermined state is reached. In other words, the brake device obtains the vehicle braking force corresponding to the brake operating state by cooperative operation with the hydraulic brake device.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of a conventional vehicle brake device. As shown in FIG. 1, the conventional vehicle brake device 1' is composed of a master pump 11', a hydraulic control system 12', an electronic control unit 13', and a brake unit 14', wherein the hydraulic control system 12 'More includes: a first pressure sensor 121', a second pressure sensor 122', a solenoid valve 123', a first oil accumulator 124', a normally open solenoid valve 125', a first A second accumulator 126', a check valve 127', and a pump 128'. In the conventional vehicle brake device 1', the electronic control unit 13' controls the solenoid valve 123' through the signals of the first pressure sensor 121' and the second pressure sensor 122'. The normally open solenoid valve 125' and the oil passage of the pump 128' enable the electronic control unit 13' to control the force of the brake unit 14' to prevent the wheel from slipping out of control due to the brake being locked.

Although the conventional vehicle brake device 1' shown in FIG. 1 has been widely used in various vehicle brake systems, the conventional vehicle brake device 1' still has the following disadvantages: the conventional vehicle brake device 1' is applied. In the three-wheeled vehicle system, when turning the brake, the solenoid valve 123' will simultaneously intervene in the brake unit 14' of the left and right wheels, so that the left and right wheels are simultaneously braked, thereby causing understeer or pusher.

Therefore, in view of the fact that the conventional vehicle brake device 1' exhibits many drawbacks in practical applications, the inventor of the present invention has vigorously studied and invented, and finally developed a three-wheeled differential steering system of the present invention.

The main objective of the present invention is to provide a tricycle differential steering system, comprising: an acceleration sensor, a control module, a hydraulic modulation module, an actuator, a first brake module, and a second Brake module. According to the design of the present invention, when the acceleration sensor detects a left-wheeled vehicle turning left, the control module controls the actuator, so that a left hydraulic modulation unit and the first brake module are made. A first action. Similarly, when the acceleration sensor detects that the three-wheeled vehicle is turning right, the control module controls the actuator, so that a right hydraulic modulation unit and the second brake module perform a second action. . Therefore, the three-wheeled vehicle increases the bending rate of the three-wheeled vehicle by the intervention of the brake module to improve the operation capability of the three-wheeled vehicle.

Therefore, in order to achieve the main object of the present invention, the inventor of the present invention proposes a tricycle differential steering system, comprising: an acceleration sensor disposed on a three-wheeled vehicle; and a control module connecting the sense of acceleration a hydraulic modulation module is connected to the control module and has a left hydraulic modulation unit and a right hydraulic modulation unit; wherein the left hydraulic modulation unit is connected to one of the three-wheeled vehicles Above, and having a left pump, the right hydraulic modulation unit is connected to one of the three-wheeled vehicles and has a right pump; a brake master cylinder is connected to the left hydraulic modulation unit and the right a hydraulic modulating unit; an actuator connected to the right pump of the left hydraulic modulating unit and the right pump of the right hydraulic modulating unit; a first brake module connected to the control module, and Connecting the left wheel; and a second brake module connecting the control module and connecting the right wheel; wherein when the acceleration sensor detects that the three-wheeled vehicle turns left, the control module controls The actuator makes The left hydraulic modulation unit and the first brake module perform a first action; wherein when the acceleration sensor detects that the three-wheeled vehicle is turning right, the control module controls the actuator, so that The right hydraulic modulation unit and the second brake module perform a second action.

In order to more clearly describe a tricycle differential steering system proposed by the present invention, a preferred embodiment of the present invention will be described in detail below with reference to the drawings.

Please refer to FIG. 2A and FIG. 2B simultaneously. FIG. 2A is a top view of a three-wheeled vehicle of the present invention, and FIG. 2B is a schematic diagram of a tricycle differential steering system of the present invention. As shown in FIG. 2A and FIG. 2B, a three-wheeled vehicle 2 of the present invention includes an acceleration sensor 11, a control module 12, a left wheel 21, a right wheel 22, and a rear wheel. In addition, a tricycle differential steering system 1 of the present invention includes: a hydraulic modulation module 13 , an actuator 14 , a first brake module 15 , a second brake module 16 , and the acceleration sensor 11 . The control module 12 and a brake master cylinder 19; wherein the acceleration sensor 11 is disposed on the three-wheeled vehicle 2, and the control module 12 is connected to the acceleration sensor 11 (G-Sensor). At the same time, the hydraulic pressure modulation module 13 is connected to the control module 12 and has a left hydraulic pressure modulation unit 131 and a right hydraulic pressure modulation unit 132. The left hydraulic pressure modulation unit 131 is connected to the three wheels. The left wheel 21 of the vehicle 2 has a left pump 1310; the right hydraulic pressure modulation unit 132 is coupled to the right wheel 22 of the three-wheeled vehicle 2 and has a right pump 1320. In the present invention, the brake master cylinder 19 is connected to the left hydraulic pressure modulation unit 131 and the right hydraulic pressure modulation unit 132, and the actuator 14 is connected to the left pump 1310 of the left hydraulic pressure modulation unit 131. The right pump 1320 of the right hydraulic modulation unit 132.

Please continue to refer to Figure 2B. In the present invention, the left hydraulic pressure modulation unit 131 further includes: a first direct-acting two-position two-way solenoid valve 1311, is connected to the left pump 1310, the brake master cylinder 19, and the control module 12; a second direct-acting two-position two-way solenoid valve 1312 is connected to the first direct-acting two-position two-way solenoid valve 1311, the brake master cylinder 19, and the control module 12; a first one-way valve 1313 The first direct-acting two-position two-way solenoid valve 1311 is connected in parallel; further, the first brake module 15 is connected to the left pump 1310 by a second one-way valve 17.

In the above, the right hydraulic pressure modulation unit 132 further includes: a third direct-acting two-position two-way electromagnetic valve 1321, which is connected to the right pump 1320, the brake master cylinder 19, and the control module 12; The direct-acting two-position two-way electromagnetic valve 1322 is connected to the third direct-acting two-position two-way electromagnetic valve 1321, the brake master cylinder 19, and the control module 12; a third one-way valve 1323 is connected in parallel The third direct-acting two-position two-way solenoid valve 1321; further, the second brake module 16 is connected to the right pump 1320 by a fourth one-way valve 18.

Continuing to refer to FIG. 3 and FIG. 4 simultaneously, FIG. 3 is a schematic diagram of a three-wheeled vehicle performing a left-turning motion according to the present invention, and FIG. 4 is a schematic diagram of a three-wheeled differential steering system performing a left-turning motion according to the present invention. As shown in the figure, in the present invention, when the acceleration sensor 11 detects that the three-wheeled vehicle 2 turns left, the control module 12 causes the left pump 1310 and the right by controlling the actuator 14. The pump 1320 is actuated. At the same time, the control module 12 controls the first direct-acting two-position two-way solenoid valve 1311 to be in a closed state, and the second direct-acting two-position two-way solenoid valve 1312 to be in an on state. Thus, the left pump 1310 is actuated, and the brake oil in the brake master cylinder 19 is pumped into the left wheel cylinder to drive the first brake module 15 such that the left wheel 21 slows down.

Continuing to refer to FIG. 5 and FIG. 6 simultaneously, FIG. 5 is a schematic diagram of a three-wheeled vehicle performing a right-turning motion according to the present invention, and FIG. 6 is a schematic diagram of a three-wheeled differential steering system performing a right-turning motion according to the present invention. In the present invention, when the acceleration sensor 11 detects that the three-wheeled vehicle 2 is turning right, the control module 12 activates the left pump 1310 and the right pump 1320 by controlling the actuator 14. At the same time, the control module 12 controls the third direct-acting two-position two-way electromagnetic valve 1321 to be in a closed state, and the fourth direct-acting two-position two-way electromagnetic valve 1322 is in a conducting state, so that the right pump 1320 is activated. The brake oil in the brake master cylinder 19 is pumped into the right wheel cylinder to drive the second brake module 16 such that the right wheel 22 slows down.

Thus, the above description has completely and clearly explained the components and technical features of the tricycle differential steering system of the present invention; and, as described above, it can be known that the tricycle differential steering system of the present invention has the following advantages:

The tricycle differential steering system 1 of the present invention comprises: an acceleration sensor 11, a control module 12, a hydraulic modulation module 13, an actuator 14, a first brake module 15, and a first Two brake modules 16. According to the design of the present invention, when the acceleration sensor 11 detects that the three-wheeled vehicle 2 turns left, the control unit 12 controls the actuator 14 to make the left hydraulic pressure modulation unit 131 and the right hydraulic pressure adjustment. The variable unit 132 and the first brake module 15 perform a first action. Similarly, when the acceleration sensor 11 detects that the three-wheeled vehicle 2 is turning right, the control module 12 controls the actuator 14 to make the left hydraulic pressure modulation unit 131 and the right hydraulic pressure modulation unit. 132 and the second brake module 16 perform a second action. Therefore, the three-wheeled vehicle 2 increases the bending rate of the three-wheeled vehicle 2 by the intervention of the first brake module 15 and the second brake module 16 to improve the operating force of the three-wheeled vehicle 2.

It is to be understood that the foregoing detailed description of the embodiments of the present invention is not intended to Both should be included in the scope of the patent in this case.

<present invention>

1‧‧‧Tricycle Differential Steering System

2‧‧‧Three-wheeled vehicle

11‧‧‧Acceleration sensor

12‧‧‧Control Module

13‧‧‧Hydraulic modulation module

14‧‧‧Actuator

15‧‧‧First brake module

16‧‧‧Second brake module

17‧‧‧Second check valve

18‧‧‧fourth check valve

19‧‧‧ brake master cylinder

21‧‧‧Revolver

22‧‧‧Right round

131‧‧‧ Left hydraulic modulation unit

132‧‧‧right hydraulic modulation unit

1311‧‧‧First direct-acting two-position two-way solenoid valve

1312‧‧‧Second direct-acting two-position two-way solenoid valve

1313‧‧‧First check valve

1310‧‧‧Left pump

1321‧‧‧The third direct-acting two-position two-way solenoid valve

1322‧‧‧The fourth direct-acting two-position two-way solenoid valve

1323‧‧‧3rd check valve

1320‧‧‧right pump

<知知>

1'‧‧‧known vehicle brakes

11'‧‧‧Master pump

12'‧‧‧Hydraulic Control System

13’‧‧‧Electronic Control Unit

14’‧‧‧ brake unit

121’‧‧‧First Pressure Sensor

122'‧‧‧Second pressure sensor

123'‧‧‧ solenoid valve

124’‧‧‧First Oil Accumulator

125'‧‧‧Normally Open Solenoid Valve

126’‧‧‧Second oil accumulator

127’‧‧‧ check valve

128’‧‧‧ pump

1 is a schematic view of a conventional vehicle brake device; FIG. 2A is a plan view of a three-wheeled vehicle of the present invention; FIG. 2B is a schematic view of a three-wheeled differential steering system of the present invention; FIG. 4 is a schematic diagram of a three-wheeled differential steering system performing a left-turning motion according to the present invention; FIG. 5 is a schematic diagram of a three-wheeled vehicle performing a right-turning motion according to the present invention; A schematic diagram of a right-turning action of a three-wheeled differential steering system of the invention.

Claims (5)

A tricycle differential steering system includes: an acceleration sensor disposed on a three-wheeled vehicle; a control module connected to the acceleration sensor; and a hydraulic modulation module connected to the control module And having a left hydraulic pressure modulation unit and a right hydraulic pressure modulation unit; wherein the left hydraulic pressure modulation unit is coupled to one of the left wheel of the three-wheeled vehicle and has a left pump, the right hydraulic modulation unit Is connected to one of the three-wheeled vehicles and has a right pump; a brake master cylinder connecting the left hydraulic modulation unit and the right hydraulic modulation unit; an actuator connecting the left hydraulic pressure The left pump of the variable unit and the right pump of the right hydraulic modulation unit; a first brake module connecting the control module and connecting the left wheel; and a second brake module connecting the Controlling the module and connecting the right wheel; wherein, when the acceleration sensor detects that the three-wheeled vehicle turns left, the control module controls the actuator to make the left hydraulic modulation unit, the right Hydraulic modulation unit, the brake master cylinder And the first brake module performs a first action; wherein when the acceleration sensor detects that the three-wheeled vehicle is turning right, the control module controls the actuator to make the left hydraulic modulation unit The right hydraulic modulation unit, the brake master cylinder, and the second brake module perform a second action. The three-wheeled differential steering system of claim 1, wherein the left hydraulic modulation unit further comprises: a first direct-acting two-position two-way electromagnetic valve connecting the left pump and the brake a pump and the control module; a second direct-acting two-position two-way solenoid valve connecting the first direct-acting two-position two-way solenoid valve, the brake master cylinder, and the control module; A one-way valve is connected to the first direct-acting two-position two-way solenoid valve; wherein the first brake module is connected to the left pump by a second one-way valve. The three-wheeled differential steering system of claim 2, wherein the right hydraulic modulation unit further comprises: a third direct-acting two-position two-way electromagnetic valve connecting the right pump and the brake a pump and the control module; a fourth direct-acting two-position two-way solenoid valve connecting the third direct-acting two-position two-way solenoid valve, the brake master cylinder, and the control module; The three-way valve is connected to the third direct-acting two-position two-way solenoid valve; wherein the second brake module is connected to the right pump by a fourth one-way valve. The three-wheeled differential steering system of claim 3, wherein the first action is that the control module activates the left pump and the right pump by controlling the actuator, and at the same time, the control The module controls the first direct-acting two-position two-way electromagnetic valve to be in a closed state, and the second direct-acting two-position two-way electromagnetic valve is in a conducting state, so that the left pump is actuated, and the brake in the brake master cylinder is stopped. The oil is pumped into the left wheel sub-pump to drive the first brake module such that the left wheel slows down. The three-wheeled differential steering system of claim 3, wherein the second action is that the control module activates the left pump and the right pump by controlling the actuator, and at the same time, the control The module controls the third direct-acting two-position two-way electromagnetic valve to be in a closed state, and the fourth direct-acting two-position two-way electromagnetic valve is in a conducting state, so that the right pump is actuated, and the brake oil in the brake master cylinder Pumping into the right wheel sub-pump to drive the second brake module, so that the right wheel slows down.