CN116201641A

CN116201641A - Electronic throttle valve and control thereof

Info

Publication number: CN116201641A
Application number: CN202111443624.7A
Authority: CN
Inventors: 谢莲; 郑远师; 张平; 刘昌文
Original assignee: Fuai Electronics Guizhou Co ltd
Current assignee: Fuai Electronics Guizhou Co ltd
Priority date: 2021-11-30
Filing date: 2021-11-30
Publication date: 2023-06-02

Abstract

The utility model provides an electronic throttle body, includes a steering wheel, air inlet unit and drive mechanism, air inlet unit includes a position sensor, an intake duct and with intake duct complex door plant, drive mechanism includes a initiative pivot and a driven pivot, steering wheel one end is connected to the initiative pivot, door plant one end is connected to the driven pivot, connects through coupling mechanism between two pivots, coupling mechanism realizes the transmission through the cooperation between spacing hole and the spacing post.

Description

Electronic throttle valve and control thereof

Technical Field

The invention belongs to the technical field of engines, and particularly relates to an electronic throttle body for a fuel injection air inlet system.

Background

Electronically controlled fuel injection technology is an important technology for improving the performance of an engine and achieving various increasingly strict emission standards, and a system mainly comprises an electronic fuel injection unit, an engine End Control Unit (ECU), a throttle body and the like. The throttle body is an air inlet throttling device at the end of the fuel injection gasoline engine, and is called as the throat of the engine, and the throttle body regulates the air inflow, so that the key step of realizing the power output of the engine is realized.

The traditional mechanical throttle body comprises an air inlet device, various sensors and a control device, all the components are arranged independently, so that the structure is huge, the installation performance is poor, the number of pins of a wire harness connector is large, and the system cost is increased. In particular, in the engine device for an unmanned aerial vehicle, which has a limited installation space, in order to satisfy the installation of each component, the signal line must be lengthened, and thus, the signal attenuation, the signal drop and other reliability faults are easily caused.

In addition, for the electronic throttle device, the motor output shaft and the door plate shaft are connected by adopting a coupling, and a common flexible coupling is generally used, but besides the accuracy problem of the coupling, the requirements of installation position setting and connection reliability are met, so that the product volume and the weight are increased, and the use cost is increased.

Therefore, the simplified and miniaturized electronic air inlet system not only improves the overall applicability and the economical efficiency, but also increases the reliability and the safety of the whole machine to a certain extent, and can reduce the system cost.

Disclosure of Invention

The present invention has been made in view of the above problems, and an object of the present invention is to provide an electronic throttle body that is small in size, light in weight, and low in development cost, and a control method thereof.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

an electronic throttle valve comprises a steering engine, an air inlet device and a transmission mechanism. The air inlet device comprises a position sensor, an air inlet channel and a door plate matched with the air inlet channel, and the throttle plate is arranged in the air inlet channel. The driving mechanism comprises a driving rotating shaft and a driven rotating shaft, the driving rotating shaft is connected with one end of the steering engine, the driven rotating shaft is connected with one end of the door plate and is positioned on the central shaft of the throttle plate, the two rotating shafts are connected through a coupling mechanism and used for transmitting rotating torque, and the opening angle of the throttle plate is controlled to control the gas flow of the outlet end of the air inlet channel.

The linkage mechanism is a coupling disc and comprises at least one limiting hole and at least one limiting column, and the coupling disc realizes transmission through cooperation between the limiting hole and the limiting column. The limiting hole is in clearance fit with the limiting column, the unilateral clearance of the limiting hole is not more than 0.1mm, and the limiting column is arranged in the limiting hole. The limiting hole is an elliptical hole so as to reduce interference parts and avoid radial interference with the limiting shaft. Further, the transmission mechanism includes a tension spring. The tensioning spring enables the limiting column to be always tightly attached to the limiting hole, and the direction of the spring force of the tensioning spring is opposite to the direction of the opening force of the door plate.

The electronic throttle valve comprises an ECU control system, wherein the ECU control system is communicated with the electronic throttle valve assembly through a signal wire.

The control mode of the electronic throttle valve comprises that the ECU control system obtains an air inflow demand value through an engine load and sends a demand signal to the electronic throttle valve through a PWM waveform;

the steering engine controls the driving rotating shaft to rotate by a corresponding angle according to an input instruction of the ECU control system;

the ECU control system calculates the actual value of the air inflow of the air inlet device through an engine position sensor;

and the ECU control system compares the actual value of the obtained air quantity with the required value and corrects the PWM driving signal.

The invention will now be described in further detail with reference to the drawings and specific examples, which are not intended to limit the invention thereto.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of an electronic throttle valve provided by the invention.

FIG. 2 is a schematic diagram of a coupling disc embodiment of an electronic throttle according to the present invention.

FIG. 3 is a control logic diagram of the electronic throttle valve provided by the present invention.

Detailed Description

The invention is further described below with reference to the drawings and examples.

The invention provides a structural schematic diagram of an electronic throttle valve embodiment, which comprises a steering engine 100, an air inlet device 103, a transmission mechanism 101 and an ECU control system 109.

The air inlet device 103 comprises a position sensor 104, an air inlet 110 and a door plate 105 matched with the air inlet 110, wherein the throttle plate 105 is arranged in the air inlet 110. The air scoop 110 is connected to the engine system via a flanged end face 106 with a threaded bore 106 a. The inlet duct 110 is separated by a restrictor plate 105.

The driving mechanism 101 comprises a driving rotating shaft 108 and a driven rotating shaft 107, the driving rotating shaft 108 is connected with one end of the steering engine controller 100, the driven rotating shaft 107 is connected with one end of the door plate 105 and is positioned on the central shaft of the throttle plate 105, the two rotating shafts are connected through the coupling mechanism 200 and used for transmitting rotation moment, the throttle body controls the opening angle of the door plate 105 and controls the gas flow of the outlet end of the air inlet channel 110, and the opening angle of the door plate 105 is detected through the position sensor 104 and is fed back to the ECU control system 109.

The air inlet device 103 further comprises a positioning threaded hole 111 and a threaded steering engine fixing column 112, the positioning threaded hole and the threaded steering engine fixing column are respectively used for installing the steering engine controller 100 and the position sensor 104, and the steering engine controller 100 and the position sensor 104 are respectively arranged at two sides of the air inlet device 103 when seen from an assembly position.

Specifically, the steering engine controller 100 is disposed on one side of the air inlet device 103, the steering engine 100 is installed through a fixing column 112 and is locked by a bolt 113, and the driving rotating shaft 108 faces one end of the air inlet channel 110. The steering engine 100 signals are led to the ECU control system 109 through signal lines to realize communication, the steering engine 100 is positioned at the upper end of the air inlet device 103 during installation, the steering engine is packaged through a gland 114, and the gland 114 can be fixed through a threaded hole 114a specially arranged on the air inlet device 103 and fastened on the air inlet device 103 through a locking bolt.

Further, as shown in fig. 2, the coupling mechanism 200 is a coupling disc, and includes at least one limiting hole 201 and at least one limiting post 204, the limiting hole 201 is designed on an upper turntable 203 mounted on the driving shaft 108, the limiting post 204 is designed on a lower turntable 202 mounted on the driven shaft 107, the coupling disc realizes transmission through cooperation between the limiting hole 201 and the limiting post 204, the limiting hole 201 and the limiting post 204 are in clearance fit, a single-side clearance is not greater than 0.1mm, and the limiting post 204 is mounted in the limiting hole 201.

The upper turntable 203 and the lower turntable 202 may be integrally designed with driving and driven shafts to reduce assembly variation. In addition, the limiting hole 201 is designed as an elliptical hole, so that radial interference with the limiting shaft is avoided.

The transmission 101 further comprises a tension spring 115. The tightening spring 115 enables the limiting post 204 to be always tightly attached to the limiting hole 201, and the direction of the spring force of the tightening spring 115 is opposite to the direction of the opening force of the door plate 105.

The control method for the motor throttle valve comprises the following steps:

the ECU control system 109 obtains an intake air amount demand value through an engine load, and sends a demand signal to an electronic throttle valve through a PWM waveform;

the steering engine 100 controls the driving rotating shaft 108 to rotate by a corresponding angle according to an instruction input by the ECU control system 109;

the ECU control system 109 calculates an actual value of the intake air amount of the intake device 103 through an engine position sensor 104;

the ECU control system 109 compares the actual value of the obtained gas amount with the required value and corrects the PWM driving signal.

The above examples are only for illustrating the essence of the present invention, but do not limit the present application. Any modifications, simplifications, etc., which do not depart from the principles of the application, are intended to be included within the scope of the application.

The present application is not related to the fact that it is partly identical to or can be implemented with prior art.

Claims

1. The utility model provides an electronic throttle body, includes a steering wheel, air inlet unit and drive mechanism, air inlet unit includes a position sensor, an intake duct and with intake duct complex door plant, drive mechanism includes a initiative pivot and a driven pivot, steering wheel one end is connected to the initiative pivot, door plant one end is connected to the driven pivot, connects through coupling mechanism between two pivots.

2. The electronic throttle body of claim 1, wherein the linkage mechanism is a coupling disc comprising at least one limiting aperture and at least one limiting post, the coupling disc being adapted to effect transmission through cooperation between the limiting aperture and the limiting post.

3. The electronic throttle body of claim 2, wherein the limit orifice is in clearance fit with the limit post with a single-sided clearance of no more than 0.1mm.

4. An electronic throttle body as set forth in claim 3 wherein said limiting aperture is an oval aperture to avoid radial interference with the limiting shaft.

5. The electronic throttle body as set forth in claim 4, wherein said transmission mechanism includes a tension spring such that said stopper post is always abutted against the stopper hole, the direction of the spring force of said tension spring being opposite to the direction of the opening force of the door panel.

6. A method of controlling an electronic throttle body as claimed in any one of claims 1 to 5, comprising an ECU control system in communication with the electronic throttle assembly via a signal line.

7. The control method according to claim 6, comprising the ECU control system obtaining an intake air amount demand value through an engine load and sending the demand signal to the electronic throttle valve through a PWM waveform.

8. The control method of claim 7, further comprising the step of controlling the driving shaft to rotate by a corresponding angle according to an instruction inputted by the ECU control system.

9. The control method of an electronic throttle body according to claim 8, further comprising the step of the ECU control system calculating an actual value of an intake air amount of the intake device by an engine position sensor.

10. The control method according to claim 9, further comprising the step of comparing the actual value of the obtained gas amount with a demand value by the ECU control system and correcting the PWM drive signal.