CN113799755A - Hydraulic control unit with double motors and brake system - Google Patents
Hydraulic control unit with double motors and brake system Download PDFInfo
- Publication number
- CN113799755A CN113799755A CN202010533359.0A CN202010533359A CN113799755A CN 113799755 A CN113799755 A CN 113799755A CN 202010533359 A CN202010533359 A CN 202010533359A CN 113799755 A CN113799755 A CN 113799755A
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- Prior art keywords
- motor
- control unit
- valve block
- hydraulic valve
- hydraulic
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/10—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with fluid assistance, drive, or release
- B60T13/66—Electrical control in fluid-pressure brake systems
- B60T13/68—Electrical control in fluid-pressure brake systems by electrically-controlled valves
- B60T13/686—Electrical control in fluid-pressure brake systems by electrically-controlled valves in hydraulic systems or parts thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T13/00—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems
- B60T13/74—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive
- B60T13/745—Transmitting braking action from initiating means to ultimate brake actuator with power assistance or drive; Brake systems incorporating such transmitting means, e.g. air-pressure brake systems with electrical assistance or drive acting on a hydraulic system, e.g. a master cylinder
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- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Regulating Braking Force (AREA)
Abstract
The invention aims to provide a hydraulic control unit with double motors and a brake system, wherein the two motors are arranged on a hydraulic valve block, the axes of the two motors are arranged on a large plane of the hydraulic valve block in parallel or two planes which are parallel to each other, so that the requirement of automatic driving of a vehicle can be met, and the two pressure generating devices are integrally arranged on the hydraulic valve block.
Description
Technical Field
The invention relates to the field of vehicle braking, in particular to a hydraulic control unit with double motors and a braking system.
Background
A known vehicle brake-by-wire system includes a hydraulic control unit and an electronic control unit. The hydraulic control unit generally comprises: the brake system comprises a brake master cylinder, a pedal stroke sensor, a pedal feeling simulator, a motor, a plurality of electromagnetic valves and a hydraulic valve block for accommodating and fixing the components. The electronic control unit is typically mounted on the hydraulic valve block.
The brake master cylinder generates hydraulic pressure through a master cylinder piston which is connected with a vehicle brake pedal and driven by the brake pedal, the pedal stroke sensor is used for transmitting pedal stroke signals to the electronic control unit, the pedal feeling simulator absorbs the hydraulic pressure of the brake master cylinder to provide foot feeling of a driver, the motor drives the piston to provide brake pressure for a vehicle brake wheel cylinder, the electromagnetic valve is arranged on each control node of a hydraulic oil path and conducts on-off operation on the hydraulic flow path according to the requirement of brake control, a plurality of hole characteristics and connecting structure characteristics are arranged on the hydraulic valve block to contain and install the components, and a plurality of hydraulic oil paths are constructed to conduct hydraulic connection on the components. The electronic control unit controls the motor and the plurality of electromagnetic valves and provides functions of brake-by-wire, various active/automatic brakes, brake energy recovery (regenerative braking), anti-lock braking, electronic stability of the vehicle body and the like.
The system principle is shown in fig. 4, and the basic working process is as follows:
when the system works normally, a brake-by-wire mode is executed, the braking intention of a driver is obtained through the pedal stroke sensor 43, the motor 211 is electrified to drive the booster piston 212 to generate brake fluid pressure, and meanwhile, the corresponding electromagnetic valve is electrified to work, and the brake fluid pressure is transmitted to the wheel cylinder 90 of the vehicle brake for braking; when the system is in a failure state, the mechanical backup braking mode is entered, the motor and each electromagnetic valve do not work (power is cut off), and the driver directly drives the brake pedal 10, so as to drive the master cylinder pistons 41 and 42 to generate brake fluid pressure and transmit the brake fluid pressure to the wheel cylinders 90 of the vehicle brakes for braking.
Fig. 4 is a schematic diagram of a typical integrated brake-by-wire system scheme. Referring to the hydraulic valve block (fig. 5) shown in U.S. publication No. US 2019/0031164 a1, the prior art hydraulic control unit generally integrates the master cylinder, the pedal stroke sensor, the pedal feel simulator, the motor and the solenoid valve through the hydraulic valve block, and has only one motor (32, 32 a) and only one electronic control unit with a single controller.
For braking systems of autonomous vehicles, due to the absence of human intervention, when an electrical failure of the system occurs (including a motor failure), another independent set of electrical systems is required to take over the braking, at least temporarily, in order to give the driver time to perform the manual intervention. For a brake system having only one motor and only a single controller electronic control unit, a vehicle in an autonomous driving state will lack a brake function upon failure of the motor or the controller, and thus cannot be used for an autonomous driving vehicle.
Referring to chinese publication No. CN 110015285 a, a brake system solution for an autonomous vehicle (fig. 6) is disclosed, which adds a second brake unit to the first brake unit shown in fig. 4, wherein the second brake unit is a known and widely used vehicle body electronic stability system (ESP, ESC product) for mass production vehicles. Therefore, the first brake unit and the second brake unit are generally constructed as two independent modules in mechanical structure, resulting in a large total weight and volume and high cost.
Disclosure of Invention
In order to solve the problems, the invention provides a hydraulic control unit with double motors and a brake system, wherein the two motors are arranged on a hydraulic valve block, the axes of the two motors are arranged on a large plane of the hydraulic valve block in parallel or two planes which are parallel to each other, so that the requirement of an automatic driving vehicle can be met, and the two pressure generating devices are integrally arranged on the hydraulic valve block.
The invention aims to provide a hydraulic control unit with double motors, which comprises a pedal feel simulator, a first motor, a plurality of electromagnetic valves, a hydraulic valve block for accommodating and fixing the components, and a second motor, wherein the axes of the first motor and the second motor are mutually parallel and are installed and fixed on the same plane of the hydraulic valve block or two mutually parallel planes in an outward extending manner.
The further improvement lies in that: the first motor drives the first supercharging piston to do linear motion through the first transmission mechanism; and the second motor drives the second supercharging piston to do high-frequency reciprocating motion through the second transmission mechanism.
The further improvement lies in that: the first transmission mechanism is a ball screw or a planetary roller screw transmission mechanism; the second transmission mechanism is a cam.
The further improvement lies in that: the first motor mounting surface of the hydraulic valve block is provided with a first accommodating hole for mounting a first supercharging piston and a first supercharging cylinder sleeve; a second accommodating hole is formed in the second motor mounting surface of the hydraulic valve block for mounting a second transmission mechanism; and a plurality of third accommodating holes are formed in a plurality of side surfaces, adjacent to the second motor mounting surface, of the hydraulic valve block for mounting a second supercharging piston.
The further improvement lies in that: the hydraulic pressure simulator is characterized in that a plurality of hydraulic interfaces connected with a vehicle brake wheel cylinder are arranged on a motor mounting surface of the hydraulic valve block, a plurality of accommodating holes are formed in a reverse back surface, opposite to the motor mounting surface, of the hydraulic valve block, a plurality of electromagnetic valves are installed in the accommodating holes, and a pedal feel simulator is installed in the accommodating holes.
The invention also provides a braking system with the hydraulic control unit with the double motors, which further comprises an electronic control unit, wherein the electronic control unit comprises a first wire harness interface and a second wire harness interface, power is respectively supplied to a first controller and a second controller of the electronic control unit, the first controller controls the first motor, and the second controller controls the second motor.
The further improvement lies in that: the hydraulic control valve is fixedly arranged on a vehicle chassis frame through a plurality of mounting holes arranged on the lower side face and the left side face or the right side face of the hydraulic valve block, which are adjacent to the motor mounting face.
The invention has the beneficial effects that: the two motors are arranged on the hydraulic valve block, the axes of the two motors are arranged on one large plane of the hydraulic valve block in parallel or two planes which are parallel to each other, the requirement of automatically driving a vehicle can be met, the two pressure generating devices are integrally arranged on the hydraulic valve block, and compared with a redundant braking system which is separately constructed, the hydraulic braking system has the advantages that the total weight and the volume are reduced, the cost is low, and the hydraulic braking system is suitable for braking the vehicle.
Drawings
Fig. 1 is a schematic front view of the present invention.
Fig. 2 is an exploded view of the right side of the present invention.
Fig. 3 is an exploded view of the left side of the present invention.
Fig. 4 is a schematic diagram of prior art US 2019/0031164 a 1.
Fig. 5 is a schematic diagram of a prior art US 2019/0031164 a1 hydraulic valve block.
Fig. 6 is a schematic diagram of prior art CN 110015285 a in the background art.
In FIGS. 1-3: 30-pedal feeling simulator, 210-first pressure generating device, 60-electromagnetic valve, 80-hydraulic valve block, 220-second pressure generating device, 211-first motor, 221-second motor, 81, 81.1, 81.2-right front of motor mounting surface of hydraulic valve block, 213-first transmission mechanism, 212-first booster piston, 223-second transmission mechanism, 222-second booster piston, 215-first accommodating hole, 214-first booster cylinder sleeve, 225-second accommodating hole, 83-upper side of hydraulic valve block, 84-lower side of hydraulic valve block, 85-left side of hydraulic valve block, 86-right side of hydraulic valve block, 224-third accommodating hole, 88-hydraulic interface, 82-reverse back of hydraulic valve block, 61-fifth accommodating hole, 31-receiving hole four, 200-electronic control unit, 201 first harness interface, 202-second harness interface, 70-mounting hole.
Detailed Description
For the purpose of enhancing understanding of the present invention, the present invention will be further described in detail with reference to the following examples, which are provided for illustration only and are not to be construed as limiting the scope of the present invention.
Example one
As shown in fig. 1-3, the present embodiment provides a hydraulic control unit with dual motors, which includes a pedal feel simulator 30, a first motor 211, a plurality of solenoid valves 60, a hydraulic valve block 80 for accommodating and fixing the above components, and a second motor 221, wherein the first motor 211 and the second motor 221 are installed and fixed on the same plane 81 of the hydraulic valve block 80 or on two planes 81.1, 81.2 parallel to each other in a manner that the axes are parallel to each other and extend outward.
The first motor 211 drives the first boost piston 212 to make linear motion through the first transmission mechanism 213; the second motor 221 drives the second boost piston 222 to reciprocate at high frequency through the second transmission mechanism 223. The first transmission mechanism 213 is a ball screw or a planetary roller screw transmission mechanism; the second transmission mechanism 223 is a cam. A first motor mounting surface 81.1 of the hydraulic valve block 80 is provided with a first accommodating hole 215 for mounting a first supercharging piston 212 and a first supercharging cylinder sleeve 214; a second accommodating hole 225 is formed in the second motor mounting surface 81.2 of the hydraulic valve block 80 for mounting a second transmission mechanism 223; the plurality of sides 83, 84, 85, 86 of the hydraulic valve block adjacent to the second motor mounting surface 81.2 are provided with a plurality of receiving holes three 224 for mounting a second boost piston 222. The motor mounting surfaces 81, 81.1 and 81.2 of the hydraulic valve block 80 are provided with a plurality of hydraulic interfaces 88 connected with a brake cylinder of a vehicle, the reverse back surface 82 opposite to the motor mounting surface of the hydraulic valve block 80 is provided with a plurality of accommodating holes five 61 for installing a plurality of electromagnetic valves 60, and the accommodating hole four 31 for installing the pedal feeling simulator 30.
Example two
The embodiment provides a braking system of a hydraulic control unit with double motors, which comprises an electronic control unit 200, wherein the electronic control unit 200 comprises a first wire harness interface 201 and a second wire harness interface 202, power is respectively supplied to a first controller and a second controller of the electronic control unit, the first controller controls a first motor 211, and the second controller controls a second motor 221. The hydraulic valve block 80 is mounted and fixed to the vehicle chassis frame through a plurality of mounting holes 70 provided on a lower side 84 and a left side 85 or a right side 86 of the hydraulic valve block adjacent to the motor mounting surface.
In the embodiment, the two motors are arranged on the hydraulic valve block, the axes of the two motors are arranged on one large plane of the hydraulic valve block in parallel or two planes which are parallel to each other, so that the requirement of automatic driving of a vehicle can be met, the two pressure generating devices are integrally arranged on the hydraulic valve block, and compared with a redundant braking system which is separately constructed, the two pressure generating devices have the advantages of reduced total weight and volume, low cost and suitability for braking of the vehicle.
Claims (7)
1. A hydraulic control unit with double motors, comprising a pedal feel simulator (30), a first motor (211), a plurality of solenoid valves (60), a hydraulic valve block (80) for accommodating and fixing the above components, characterized in that: the hydraulic valve further comprises a second motor (221), and the first motor (211) and the second motor (221) are installed and fixed on the same plane (81) of the hydraulic valve block (80) or two planes (81.1, 81.2) parallel to each other in a mode that the axes of the first motor and the second motor are parallel to each other and extend outwards.
2. A hydraulic control unit having dual motors as set forth in claim 1, wherein: the first motor (211) drives the first supercharging piston (212) to do linear motion through the first transmission mechanism (213); the second motor (221) drives the second supercharging piston (222) to do high-frequency reciprocating motion through a second transmission mechanism (223).
3. A hydraulic control unit having two motors as set forth in claim 2, wherein: the first transmission mechanism (213) is a ball screw or a planetary roller screw transmission mechanism; the second transmission mechanism (223) is a cam.
4. A hydraulic control unit having two motors as claimed in claims 2 and 3, wherein: a first motor mounting surface (81.1) of the hydraulic valve block (80) is provided with a first accommodating hole (215) for mounting a first supercharging piston (212) and a first supercharging cylinder sleeve (214); a second motor mounting surface (81.2) of the hydraulic valve block (80) is provided with a second accommodating hole (225) for mounting a second transmission mechanism (223); and a plurality of accommodating holes (224) are formed in a plurality of side surfaces (83, 84, 85, 86) adjacent to the second motor mounting surface (81.2) of the hydraulic valve block for mounting a second booster piston (222).
5. A hydraulic control unit having dual motors as set forth in claim 1, wherein: the hydraulic control pedal simulator is characterized in that a plurality of hydraulic interfaces (88) connected with a brake wheel cylinder of a vehicle are arranged on motor mounting surfaces (81, 81.1 and 81.2) of a hydraulic valve block (80), a plurality of accommodating holes five (61) are formed in a reverse back surface (82) opposite to the motor mounting surface on the hydraulic valve block (80) and used for installing a plurality of electromagnetic valves (60), and an accommodating hole four (31) is used for installing a pedal feel simulator (30).
6. A brake system having a hydraulic control unit with two motors as set forth in any one of the preceding claims, characterized in that: the motor control system is characterized by further comprising an electronic control unit (200), wherein the electronic control unit (200) comprises a first wiring harness interface (201) and a second wiring harness interface (202) which respectively supply power to a first controller and a second controller of the electronic control unit, the first controller controls a first motor (211), and the second controller controls a second motor (221).
7. A brake system having a dual-motor hydraulic control unit as claimed in claim 6, wherein: the hydraulic valve block is fixedly arranged on a chassis frame of a vehicle through a plurality of mounting holes (70) arranged on a lower side surface (84) and a left side surface (85) or a right side surface (86) which are adjacent to a motor mounting surface on the hydraulic valve block (80).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010533359.0A CN113799755A (en) | 2020-06-12 | 2020-06-12 | Hydraulic control unit with double motors and brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010533359.0A CN113799755A (en) | 2020-06-12 | 2020-06-12 | Hydraulic control unit with double motors and brake system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113799755A true CN113799755A (en) | 2021-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010533359.0A Pending CN113799755A (en) | 2020-06-12 | 2020-06-12 | Hydraulic control unit with double motors and brake system |
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| CN (1) | CN113799755A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116252765A (en) * | 2023-03-31 | 2023-06-13 | 重庆长安汽车股份有限公司 | Integrated braking and redundant braking system for vehicle and vehicle |
-
2020
- 2020-06-12 CN CN202010533359.0A patent/CN113799755A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116252765A (en) * | 2023-03-31 | 2023-06-13 | 重庆长安汽车股份有限公司 | Integrated braking and redundant braking system for vehicle and vehicle |
| CN116252765B (en) * | 2023-03-31 | 2024-03-19 | 重庆长安汽车股份有限公司 | Integrated braking and redundant braking system for vehicle and vehicle |
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