CN208296915U - A kind of engine intake airflow sensor - Google Patents
A kind of engine intake airflow sensor Download PDFInfo
- Publication number
- CN208296915U CN208296915U CN201820801030.6U CN201820801030U CN208296915U CN 208296915 U CN208296915 U CN 208296915U CN 201820801030 U CN201820801030 U CN 201820801030U CN 208296915 U CN208296915 U CN 208296915U
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- Prior art keywords
- measurement pipe
- ultrasonic transducer
- circuit board
- control circuit
- engine intake
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Abstract
The utility model relates to a kind of engine intake airflow sensors, including measurement pipe of ventilating, measurement pipe of ventilating is hollow thin-wall metal tube, mesh grille is equipped at nozzle, the upstream of ventilation measurement pipe is extended with installation pedestal, it is internal equipped with the first ultrasonic transducer, and the downstream for measurement pipe of ventilating equally is extended with installation pedestal, internal that second ultrasonic transducer is housed；The upstream head of ventilation measurement pipe is also equipped with control circuit board, and the first ultrasonic transducer is connect by the first cable with control circuit board, and the second ultrasonic transducer is connect by the second cable with control circuit board.Its structure can greatly prolong sensor service life, improve the accuracy of sensor measurement.
Description
Technical field
The utility model relates to sensor technical field, especially a kind of engine intake airflow sensor.
Background technique
Currently, intake flow sensor is typically mounted at engine air inlet tube, the charge flow rate of engine is detected, it will be into
Throughput is changed into voltage signal and inputs to ECU as the modified signal of oil spout, to complete being automatically brought into operation for control system.It passes
System engine generally uses high temperature air inlet pressure sensor to carry out detection to temperature and pressure thus by temperature, pressure transition for electricity
Pressure signal inputs to ECU as the modified signal of oil spout, but sensors with auxiliary electrode is often because engine generates high temperature caused by tempering
Sensor lower cover is caused to be melted, electric elements inside is exposed in high fever, lead to measurement inaccuracy or even permanent damage,
Greatly reduce sensor service life, and the type sensor be affected by temperature it is bigger, even if just correcting benefit to temperature
It repays, can still cause error to measurement accuracy.
Utility model content
The applicant provides a kind of structurally reasonable engine intake airflow for the disadvantage in above-mentioned existing production technology
Sensor improves the accuracy of sensor measurement so as to greatly prolong sensor service life.
Technical solution used by the utility model is as follows:
A kind of engine intake airflow sensor, including ventilation measurement pipe, ventilation measurement pipe is hollow thin-wall metal tube, pipe
Mesh grille is equipped at mouthful, the upstream for measurement pipe of ventilating is extended with installation pedestal, internal that first ultrasonic transducer, ventilation are housed
The downstream of measurement pipe is equally extended with installation pedestal, internal that second ultrasonic transducer is housed；The upstream head for measurement pipe of ventilating
It is also equipped with control circuit board, the first ultrasonic transducer is connect by the first cable with control circuit board, the second ultrasonic transduction
Device is connect by the second cable with control circuit board.
Its further technical solution is:
The outside of control circuit board is equipped with shell, and shell is at hollow thin-wall structure.
Measurement pipe of ventilating is at rectangular parallelepiped structure.
Installation pedestal positioned at upstream and downstream is obliquely installed.
Axis positioned at two installation pedestals of upstream and downstream is overlapped on an oblique line.
The beneficial effects of the utility model are as follows:
The utility model is compact-sized, reasonable, easy to operate, emits and receive spy each other using two ultrasonic transducers
Head realizes propagation of the ultrasonic wave in fair current and adverse current, is calculated by the time difference that fair current and adverse current are propagated it can be concluded that gas
The flow of body.
The utility model is not influenced by temperature by way of velocity difference measurement of discharge, that is, is tempered the temperature change of generation not
Measurement accuracy can be impacted, be easy to get to authentic data.
The utility model is mainly matched on engine and uses, and can exclude temperature interference precise measurement engine air inlet tube
Gas flow.
Detailed description of the invention
Fig. 1 is the schematic diagram of internal structure of the utility model.
Fig. 2 is the surface structure schematic diagram of the utility model.
Wherein: 1, shell；2, control circuit board；3, the first ultrasonic transducer；4, the second ultrasonic transducer；5, ventilation measurement
Pipe；6, the first cable；7, the second cable
Specific embodiment
With reference to the accompanying drawing, illustrate specific embodiment of the present utility model.
As shown in Figure 1, the engine intake airflow sensor of the present embodiment, including ventilation measurement pipe 5, measurement pipe 5 of ventilating
It is hollow thin-wall metal tube, mesh grille is equipped at nozzle, the upstream of ventilation measurement pipe 5 is extended with installation pedestal, internal dress
There is the first ultrasonic transducer 3, the downstream of ventilation measurement pipe 5 is equally extended with installation pedestal, internal that second ultrasonic transduction is housed
Device 4；The upstream head of ventilation measurement pipe 5 is also equipped with control circuit board 2, the first ultrasonic transducer 3 by the first cable 6 with
Control circuit board 2 connects, and the second ultrasonic transducer 4 is connect by the second cable 7 with control circuit board 2.Control circuit board 2
Outside is equipped with shell 1, and shell 1 is at hollow thin-wall structure.Installation pedestal positioned at upstream and downstream is obliquely installed.Positioned at upper
The axis of two installation pedestals in trip and downstream is overlapped on an oblique line.
As shown in Fig. 2, ventilation measurement pipe 5 is at rectangular parallelepiped structure.
The working principle and the course of work of the utility model are as follows:
In use, when gas is flowed through from ventilation measurement pipe 5, the first ultrasonic transducer 3 emits the intake flow sensor
Ultrasonic wave, the second ultrasonic transducer 4 receive ultrasonic wave, after obtaining receiving time t1, emit ultrasound by the second ultrasonic transducer 4
Wave receives ultrasonic wave by the first ultrasonic transducer 3, obtains receiving time t2, can obtain inlet air flow after calculating by control circuit board 2
Amount, is changed into voltage signal for charge flow rate and inputs to ECU as the modified signal of oil spout, to complete the automatic of control system
Operation.
Above description is the explanation to the utility model, is not the restriction to utility model, defined by the utility model
Range is within the protection scope of the utility model referring to claim, can make any type of modification.
Claims (5)
1. a kind of engine intake airflow sensor, it is characterised in that: including ventilating measurement pipe (5), the ventilation measurement pipe (5)
It is hollow thin-wall metal tube, mesh grille is equipped at nozzle, the upstream of ventilation measurement pipe (5) is extended with installation pedestal,
Inside is equipped with the first ultrasonic transducer (3), and the downstream of ventilation measurement pipe (5) is equally extended with installation pedestal, internal dress
There are the second ultrasonic transducer (4)；The upstream head of ventilation measurement pipe (5) is also equipped with control circuit board (2), and described first
Ultrasonic transducer (3) is connect by the first cable (6) with control circuit board (2), and second ultrasonic transducer (4) passes through the
Two cables (7) are connect with control circuit board (2).
2. a kind of engine intake airflow sensor as described in claim 1, it is characterised in that: outside control circuit board (2)
Portion is equipped with shell (1), and the shell (1) is at hollow thin-wall structure.
3. a kind of engine intake airflow sensor as described in claim 1, it is characterised in that: the ventilation measurement pipe (5)
At rectangular parallelepiped structure.
4. a kind of engine intake airflow sensor as described in claim 1, it is characterised in that: positioned at the peace of upstream and downstream
Dress pedestal is obliquely installed.
5. a kind of engine intake airflow sensor as described in claim 1, it is characterised in that: positioned at the two of upstream and downstream
The axis of a installation pedestal is overlapped on an oblique line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820801030.6U CN208296915U (en) | 2018-05-25 | 2018-05-25 | A kind of engine intake airflow sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820801030.6U CN208296915U (en) | 2018-05-25 | 2018-05-25 | A kind of engine intake airflow sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208296915U true CN208296915U (en) | 2018-12-28 |
Family
ID=64727252
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820801030.6U Active CN208296915U (en) | 2018-05-25 | 2018-05-25 | A kind of engine intake airflow sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208296915U (en) |
-
2018
- 2018-05-25 CN CN201820801030.6U patent/CN208296915U/en active Active
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