WO2019158340A1 - Low-pressure sensor - Google Patents
Low-pressure sensor Download PDFInfo
- Publication number
- WO2019158340A1 WO2019158340A1 PCT/EP2019/051814 EP2019051814W WO2019158340A1 WO 2019158340 A1 WO2019158340 A1 WO 2019158340A1 EP 2019051814 W EP2019051814 W EP 2019051814W WO 2019158340 A1 WO2019158340 A1 WO 2019158340A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- vacuum
- valve mouth
- low
- pressure sensor
- sensor body
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L21/00—Vacuum gauges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0007—Fluidic connecting means
- G01L19/0015—Fluidic connecting means using switching means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/0007—Fluidic connecting means
- G01L19/003—Fluidic connecting means using a detachable interface or adapter between the process medium and the pressure gauge
Definitions
- the present utility model relates to a low-pressure sensor, in particular a vacuum pressure sensor having a vacuum one-way valve.
- a low-pressure sensor i.e. a sensor with an operating pressure lower than standard atmospheric pressure
- the main function thereof is to monitor whether a sufficient degree of vacuum is stored in the vacuum booster. If there is an insufficient degree of vacuum in the vacuum booster, a monitoring signal is transmitted to a controller of the motor vehicle.
- a high vacuum generated by a motor vehicle vacuum source a petrol engine or vacuum pump
- a motor vehicle vacuum source a petrol engine or vacuum pump
- the vacuum booster When a brake pedal is depressed, the vacuum booster generates boost under the action of the difference in gas pressure between the interior and the exterior, increasing the braking effect, and ensuring normal braking action, to achieve safe deceleration or braking of the motor vehicle.
- a low-pressure sensor in a vehicle is generally provided with a vacuum one-way valve.
- the connection between the vacuum one-way valve and a body of the low-pressure sensor plays a vital role in ensuring normal, reliable operation of the low-pressure sensor.
- An object of the present utility model is to provide a pressure sensor with a low cost.
- a low-pressure sensor for monitoring the size of vacuum pressure in a vacuum booster, comprising: a sensor body, a vacuum input valve mouth and a vacuum output valve mouth, wherein the vacuum input valve mouth is a vacuum one-way valve, having one end connected to the sensor body and another end connected to a vehicle vacuum source; the vacuum output valve mouth has one end connected to the sensor body and another end connected to a vacuum booster; the sensor body comprises a first tubular part extending towards the vacuum input valve mouth; and the vacuum input valve mouth is provided with a butt-connection tube, which at least partially sheathes the first tubular part.
- the vacuum input valve mouth is made of a material sensitive to laser light
- the butt-connection tube is fixed in a sheathing manner outside the first tubular part by laser welding, ultrasonic welding or adhesive.
- a diameter of the butt-connection tube is slightly larger than a diameter of the first tubular part.
- a vacuum input chamber is formed in the first tubular part, and is in communication with a cavity in the vacuum input valve mouth.
- the vehicle vacuum source is a petrol engine or vacuum pump.
- the vacuum input valve mouth and the vacuum output valve mouth are disposed on different sides of the sensor body; the different sides are two adjacent sides or two opposite sides of the sensor body.
- the low-pressure sensor also comprises a connector, electrically connected to another system of the vehicle so as to establish communication.
- the connector is electrically connected to a controller of the vehicle; the controller of the vehicle is an electronic control unit of an engine.
- the connector is electrically connected to an Electronic Stability Program electronic control unit.
- the sensor body and the vacuum output valve mouth are an integrally formed element, or the sensor body and the vacuum output valve mouth are mutually independent elements, fixed together by welding/bonding.
- Fig. 1 shows a three-dimensional schematic diagram of a low-pressure sensor according to a preferred embodiment of the present utility model
- Fig. 2 shows a three-dimensional exploded schematic diagram of a low-pressure sensor according to a preferred embodiment of the present utility model
- Fig. 3 shows a partial sectional schematic diagram of a low-pressure sensor according to a preferred embodiment of the present utility model.
- a low-pressure sensor in a preferred embodiment of the present utility model is used to monitor the size of vacuum pressure in a vacuum booster, and comprises a sensor body 10, a vacuum input valve mouth 20 and a vacuum output valve mouth 30, wherein the vacuum input valve mouth 20 and the vacuum output valve mouth 30 are disposed on different sides of the sensor body 10; here, the different sides are two adjacent sides or two opposite sides of the sensor body 10.
- the vacuum input valve mouth 20 is a vacuum one-way valve, having one end connected to the sensor body 10 and another end connected to a vehicle vacuum source (not shown); the vehicle vacuum source is for example a vehicle engine or vacuum pump.
- the vacuum output valve mouth 30 has one end connected to the sensor body 10 and another end connected to a vacuum booster (not shown).
- the sensor body 10 and the vacuum input valve mouth 20 are mutually independent elements, fixed together by welding/bonding.
- the sensor body 10 comprises a first tubular part 112 extending towards the vacuum input valve mouth 20; a vacuum input chamber 1120 is formed in the first tubular part 112, and is in communication with a cavity in the vacuum input valve mouth 20.
- the vacuum input valve mouth 20 is provided with a butt-connection tube 200, for mating with the first tubular part 112.
- the vacuum input valve mouth 20 is made of a material sensitive to laser light, and a diameter of the butt-connection tube 200 is slightly larger than a diameter of the first tubular part 112.
- the butt-connection tube 200 When installation is carried out, the butt-connection tube 200 at least partially sheathes the first tubular part 112, and is fixed outside the first tubular part 112 by laser welding, ultrasonic welding or adhesive, thereby fixing the vacuum input valve mouth 20 to the sensor body 10 in a sheathing manner.
- the sensor body 10 is made of a material sensitive to laser light, and a diameter of the butt-connection tube 200 is slightly smaller than a diameter of the first tubular part 112.
- the butt-connection tube 200 is sheathed by the first tubular part 112, and is fixed in a sheathed manner inside the first tubular part 112 by laser welding, ultrasonic welding or adhesive, thereby fixing the vacuum input valve mouth 20 to the sensor body 10.
- the butt-connection part 200 has a slightly larger diameter than the first tubular part 112 and the butt-connection part 200 sheathes the first tubular part 112, a material sensitive to laser light must be used to make the vacuum input valve mouth 20. If an embodiment is used in which the butt-connection part 200 has a slightly smaller diameter than the first tubular part 112 and the butt-connection part 200 is sheathed by the first tubular part 112, a material sensitive to laser light must be used to make the sensor body 10.
- the vacuum input valve mouth 20 has a smaller volume than the sensor body 10, the cost of using a material sensitive to laser light to make the vacuum input valve mouth 20 is lower than the cost of using a material sensitive to laser light to make the sensor body 10; thus, by using the embodiment in which the butt-connection part 200 has a slightly larger diameter than the first tubular part 112 and the butt-connection part 200 sheathes the first tubular part 112, production costs can be lowered, so the present utility model preferably uses this embodiment.
- the sensor body 10 has a larger volume than the vacuum input valve mouth 20, so a greater amount of material sensitive to laser light is needed to make the sensor body 10; this does not help to reduce costs.
- the sensor body 10 and the vacuum output valve mouth 30 may be an integrally formed element.
- the sensor body 10 and the vacuum output valve mouth 30 are mutually independent elements, fixed together by welding/bonding.
- the vehicle vacuum source operates, extracting air from the interior of the vacuum output valve mouth 30, and thereby establishing a vacuum in the vacuum output valve mouth 30.
- the sensor body 10 also comprises a cover 102, and is provided with an upper chamber 103; the cover 102 is mounted in a fixed manner to the sensor body 10 and covers the upper chamber 103, and a sensor chip (not shown) is provided therein. A value of negative pressure inside the vacuum booster is monitored, and a signal is transmitted to an electronic control unit of the engine.
- the low-pressure sensor also comprises a connector 50, electrically connected to another system (not shown) of the vehicle so as to establish communication; the low-pressure sensor transmits a sensing signal of the size of vacuum pressure in the vacuum booster, obtained by the low-pressure sensor by monitoring, to the other system via the connector 50.
- the connector 50 is electrically connected to a controller of the vehicle, such as the electronic control unit of the engine, for the purpose of vacuum control. Specifically, if there is an insufficient degree of vacuum in the vacuum booster, a monitoring signal is transmitted to the controller of the vehicle. Under the control of the controller, a high vacuum generated by the vehicle vacuum source (a petrol engine or vacuum pump) is unidirectionally accumulated in the vacuum booster, ensuring that a sufficient degree of vacuum is stored in the vacuum booster.
- the connector 50 may also be electrically connected to an Electronic Stability Program electronic control unit or another system, for a braking control strategy.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Valves And Accessory Devices For Braking Systems (AREA)
- Braking Systems And Boosters (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The present utility model provides a low-pressure sensor, for monitoring the size of vacuum pressure in a vacuum booster, comprising: a sensor body, a vacuum input valve mouth and a vacuum output valve mouth, wherein the vacuum input valve mouth is a vacuum one-way valve, having one end connected to the sensor body and another end connected to a vehicle vacuum source; the vacuum output valve mouth has one end connected to the sensor body and another end connected to a vacuum booster; the sensor body comprises a first tubular part extending towards the vacuum input valve mouth; and the vacuum input valve mouth is provided with a butt-connection tube, which at least partially sheathes the first tubular part.
Description
Description
LOW PRESSURE SENSOR
Technical field
The present utility model relates to a low-pressure sensor, in particular a vacuum pressure sensor having a vacuum one-way valve.
Background art
A low-pressure sensor, i.e. a sensor with an operating pressure lower than standard atmospheric pressure, is an important safety component of a hydraulic braking system of a motor vehicle, mounted between a vacuum booster and a braking vacuum source. The main function thereof is to monitor whether a sufficient degree of vacuum is stored in the vacuum booster. If there is an insufficient degree of vacuum in the vacuum booster, a monitoring signal is transmitted to a controller of the motor vehicle. Under the control of the controller, a high vacuum generated by a motor vehicle vacuum source (a petrol engine or vacuum pump) is unidirectionally accumulated in the vacuum booster, ensuring that a sufficient degree of vacuum is stored in the vacuum booster, and ensuring that the motor vehicle has sufficient vacuum servo force in various operating conditions. When a brake pedal is depressed, the vacuum booster generates boost under the action of the difference in gas pressure between the interior and the exterior, increasing the braking effect, and ensuring normal braking action, to achieve safe deceleration or braking of the motor vehicle.
A low-pressure sensor in a vehicle is generally provided with a vacuum one-way valve. The connection between the vacuum one-way valve and a body of the low-pressure sensor plays a vital role in ensuring normal, reliable operation of the low-pressure sensor.
Content of the utility model
An object of the present utility model is to provide a pressure sensor with a low cost.
To this end, according to one aspect of the present application, a low-pressure sensor is provided, for monitoring the size of vacuum pressure in a vacuum booster, comprising: a sensor body, a vacuum input valve mouth and a vacuum output valve mouth, wherein the vacuum input valve mouth is a vacuum one-way valve, having one end connected to the sensor body and another end connected to a vehicle vacuum source; the vacuum output valve mouth has one end connected to the sensor body and another end connected to a vacuum booster; the sensor body comprises a first tubular part extending towards the vacuum input valve mouth; and the vacuum input valve mouth is provided with a butt-connection tube, which at least partially sheathes the first tubular part.
According to one feasible embodiment, the vacuum input valve mouth is made of a material sensitive to laser light, and the butt-connection tube is fixed in a sheathing manner outside the first tubular part by laser welding, ultrasonic welding or adhesive.
According to one feasible embodiment, a diameter of the butt-connection tube is slightly larger than a diameter of the first tubular part.
According to one feasible embodiment, a vacuum input chamber is formed in the first tubular part, and is in communication with a cavity in the vacuum input valve mouth.
According to one feasible embodiment, the vehicle vacuum source is a petrol engine or vacuum pump.
According to one feasible embodiment, the vacuum input valve mouth and the vacuum output valve mouth are disposed on different sides of the sensor body; the different sides are two adjacent sides or two
opposite sides of the sensor body.
According to one feasible embodiment, the low-pressure sensor also comprises a connector, electrically connected to another system of the vehicle so as to establish communication.
According to one feasible embodiment, the connector is electrically connected to a controller of the vehicle; the controller of the vehicle is an electronic control unit of an engine.
According to one feasible embodiment, the connector is electrically connected to an Electronic Stability Program electronic control unit.
According to one feasible embodiment, the sensor body and the vacuum output valve mouth are an integrally formed element, or the sensor body and the vacuum output valve mouth are mutually independent elements, fixed together by welding/bonding.
Description of the accompanying drawings
A better understanding of the abovementioned and other features and advantages of the present utility model will be gained from the following embodiments of the present utility model, which are described with reference to the accompanying drawings. Here:
Fig. 1 shows a three-dimensional schematic diagram of a low-pressure sensor according to a preferred embodiment of the present utility model;
Fig. 2 shows a three-dimensional exploded schematic diagram of a low-pressure sensor according to a preferred embodiment of the present utility model;
Fig. 3 shows a partial sectional schematic diagram of a low-pressure sensor according to a preferred embodiment of the present utility model.
Particular embodiments
Low-pressure sensors according to preferred embodiments of the present utility model are described below with reference to the
accompanying drawings.
Referring to fig. 1, a low-pressure sensor in a preferred embodiment of the present utility model is used to monitor the size of vacuum pressure in a vacuum booster, and comprises a sensor body 10, a vacuum input valve mouth 20 and a vacuum output valve mouth 30, wherein the vacuum input valve mouth 20 and the vacuum output valve mouth 30 are disposed on different sides of the sensor body 10; here, the different sides are two adjacent sides or two opposite sides of the sensor body 10. In this embodiment, the vacuum input valve mouth 20 is a vacuum one-way valve, having one end connected to the sensor body 10 and another end connected to a vehicle vacuum source (not shown); the vehicle vacuum source is for example a vehicle engine or vacuum pump. The vacuum output valve mouth 30 has one end connected to the sensor body 10 and another end connected to a vacuum booster (not shown).
Referring to figs. 2 and 3, in this embodiment, the sensor body 10 and the vacuum input valve mouth 20 are mutually independent elements, fixed together by welding/bonding. The sensor body 10 comprises a first tubular part 112 extending towards the vacuum input valve mouth 20; a vacuum input chamber 1120 is formed in the first tubular part 112, and is in communication with a cavity in the vacuum input valve mouth 20. Correspondingly, the vacuum input valve mouth 20 is provided with a butt-connection tube 200, for mating with the first tubular part 112. Preferably, the vacuum input valve mouth 20 is made of a material sensitive to laser light, and a diameter of the butt-connection tube 200 is slightly larger than a diameter of the first tubular part 112. When installation is carried out, the butt-connection tube 200 at least partially sheathes the first tubular part 112, and is fixed outside the first tubular part 112 by laser welding, ultrasonic welding or adhesive, thereby fixing the vacuum input valve mouth 20 to the sensor body 10 in a sheathing manner. Optionally, the sensor body 10 is made of a material sensitive to laser light, and a diameter of the butt-connection tube 200 is slightly
smaller than a diameter of the first tubular part 112. When installation is carried out, the butt-connection tube 200 is sheathed by the first tubular part 112, and is fixed in a sheathed manner inside the first tubular part 112 by laser welding, ultrasonic welding or adhesive, thereby fixing the vacuum input valve mouth 20 to the sensor body 10.
If an embodiment is used in which the butt-connection part 200 has a slightly larger diameter than the first tubular part 112 and the butt-connection part 200 sheathes the first tubular part 112, a material sensitive to laser light must be used to make the vacuum input valve mouth 20. If an embodiment is used in which the butt-connection part 200 has a slightly smaller diameter than the first tubular part 112 and the butt-connection part 200 is sheathed by the first tubular part 112, a material sensitive to laser light must be used to make the sensor body 10. Since the vacuum input valve mouth 20 has a smaller volume than the sensor body 10, the cost of using a material sensitive to laser light to make the vacuum input valve mouth 20 is lower than the cost of using a material sensitive to laser light to make the sensor body 10; thus, by using the embodiment in which the butt-connection part 200 has a slightly larger diameter than the first tubular part 112 and the butt-connection part 200 sheathes the first tubular part 112, production costs can be lowered, so the present utility model preferably uses this embodiment. Conversely, the sensor body 10 has a larger volume than the vacuum input valve mouth 20, so a greater amount of material sensitive to laser light is needed to make the sensor body 10; this does not help to reduce costs.
Referring to fig. 3, in this embodiment, the sensor body 10 and the vacuum output valve mouth 30 may be an integrally formed element. Optionally, the sensor body 10 and the vacuum output valve mouth 30 are mutually independent elements, fixed together by welding/bonding. When it is necessary to create a vacuum, the vehicle vacuum source operates, extracting air from the interior of the vacuum output valve mouth 30, and thereby establishing a vacuum in the vacuum output valve
mouth 30.
The sensor body 10 also comprises a cover 102, and is provided with an upper chamber 103; the cover 102 is mounted in a fixed manner to the sensor body 10 and covers the upper chamber 103, and a sensor chip (not shown) is provided therein. A value of negative pressure inside the vacuum booster is monitored, and a signal is transmitted to an electronic control unit of the engine.
The low-pressure sensor also comprises a connector 50, electrically connected to another system (not shown) of the vehicle so as to establish communication; the low-pressure sensor transmits a sensing signal of the size of vacuum pressure in the vacuum booster, obtained by the low-pressure sensor by monitoring, to the other system via the connector 50. For example, the connector 50 is electrically connected to a controller of the vehicle, such as the electronic control unit of the engine, for the purpose of vacuum control. Specifically, if there is an insufficient degree of vacuum in the vacuum booster, a monitoring signal is transmitted to the controller of the vehicle. Under the control of the controller, a high vacuum generated by the vehicle vacuum source (a petrol engine or vacuum pump) is unidirectionally accumulated in the vacuum booster, ensuring that a sufficient degree of vacuum is stored in the vacuum booster. The connector 50 may also be electrically connected to an Electronic Stability Program electronic control unit or another system, for a braking control strategy.
Although specific embodiments of the present utility model have already been described, these are merely presented by way of demonstration, and are not intended to limit the scope of the present utility model. On the contrary, the structure described here may be embodied in various other forms; furthermore, various substitutions and changes may be made to the structural forms described here, on condition that the spirit and scope of the present utility model are not departed from.
Claims
1. Low-pressure sensor, for monitoring the size of vacuum pressure in a vacuum booster, characterized by comprising: a sensor body (10), a vacuum input valve mouth (20) and a vacuum output valve mouth (30), wherein the vacuum input valve mouth (20) is a vacuum one-way valve, having one end connected to the sensor body (10) and another end connected to a vehicle vacuum source; the vacuum output valve mouth (30) has one end connected to the sensor body (10) and another end connected to a vacuum booster; the sensor body (10) comprises a first tubular part (112) extending towards the vacuum input valve mouth (20); and the vacuum input valve mouth (20) is provided with a butt-connection tube (200), which at least partially sheathes the first tubular part (112).
2. Low-pressure sensor according to Claim 1, characterized in that the vacuum input valve mouth (20) is made of a material sensitive to laser light, and the butt-connection tube (200) is fixed in a sheathing manner outside the first tubular part (112) by laser welding, ultrasonic welding or adhesive.
3. Low-pressure sensor according to Claim 2, characterized in that a diameter of the butt-connection tube (200) is slightly larger than a diameter of the first tubular part (112).
4. Low-pressure sensor according to Claim 1, characterized in that a vacuum input chamber (1120) is formed in the first tubular part (112), and is in communication with a cavity in the vacuum input valve mouth (20).
5. Low-pressure sensor according to Claim 1, characterized in that the vehicle vacuum source is a vehicle engine or vacuum pump.
6. Low-pressure sensor according to Claim 1, characterized in that the vacuum input valve mouth (20) and the vacuum output valve mouth (30) are disposed on different sides of the sensor body (10); the different sides are two adjacent sides or two opposite sides of the sensor body (10).
7. Low-pressure sensor according to Claim 1, characterized in that the low-pressure sensor also comprises a connector (50), electrically connected to another system of the vehicle so as to establish communication.
8. Low-pressure sensor according to Claim 7, characterized in that the connector (50) is electrically connected to a controller of the vehicle; the controller of the vehicle is an electronic control unit of an engine.
9. Low-pressure sensor according to Claim 7, characterized in that the connector (50) is electrically connected to an Electronic Stability Program electronic control unit.
10. Low-pressure sensor according to Claim 1, characterized in that the sensor body (10) and the vacuum output valve mouth (30) are an integrally formed element, or the sensor body (10) and the vacuum output valve mouth (30) are mutually independent elements, fixed together by welding/bonding.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820258623.2 | 2018-02-14 | ||
| CN201820258623.2U CN207902421U (en) | 2018-02-14 | 2018-02-14 | Low pressure sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2019158340A1 true WO2019158340A1 (en) | 2019-08-22 |
Family
ID=63561176
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2019/051814 WO2019158340A1 (en) | 2018-02-14 | 2019-01-25 | Low-pressure sensor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN207902421U (en) |
| WO (1) | WO2019158340A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109572649B (en) * | 2018-12-30 | 2023-10-24 | 吉林东光奥威汽车制动系统有限公司 | Electric vacuum pump control device suitable for plateau and plateau areas |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006056242A1 (en) * | 2006-11-27 | 2008-05-29 | Robert Bosch Gmbh | Pressure sensor for use in brake system of motor vehicle, has connection port running in housing, return valve integrated in housing, another connection port provided for pressure source, and return valve arranged between flow section areas |
-
2018
- 2018-02-14 CN CN201820258623.2U patent/CN207902421U/en active Active
-
2019
- 2019-01-25 WO PCT/EP2019/051814 patent/WO2019158340A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006056242A1 (en) * | 2006-11-27 | 2008-05-29 | Robert Bosch Gmbh | Pressure sensor for use in brake system of motor vehicle, has connection port running in housing, return valve integrated in housing, another connection port provided for pressure source, and return valve arranged between flow section areas |
Also Published As
| Publication number | Publication date |
|---|---|
| CN207902421U (en) | 2018-09-25 |
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