CN217401020U

CN217401020U - Electronic throttle valve

Info

Publication number: CN217401020U
Application number: CN202122973008.4U
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: 2022-09-09
Anticipated expiration: 2031-11-30

Abstract

The utility model provides an electronic throttle body, includes a steering wheel, air inlet unit and drive mechanism, air inlet unit include a position sensor, an intake duct and with intake duct complex door plant, drive mechanism includes a initiative pivot and a driven spindle, steering wheel one end is connected in the initiative pivot, driven spindle connects door plant one end, 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

Technical Field

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

Background

The electric control fuel injection technology is an important technology for improving the performance of an engine and achieving various emission standards which are stricter and stricter, 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 a fuel injection gasoline engine, and is called as the throat of the engine, and the adjustment of the air inlet amount by the throttle body is a key step for realizing the power output of the engine.

The traditional mechanical throttle valve body comprises an air inlet device, sensors and a control device, all the components are arranged independently, the structure is large in size, poor in installation performance, and large in number of pins of a wire harness connector, and the system cost is increased. Particularly, in an unmanned aerial vehicle engine device with a limited installation space, a signal line needs to be lengthened to meet the requirement of installation of each component, so that reliability faults such as signal attenuation or signal falling are easily caused.

In addition, for an electronic throttle valve device, a motor output shaft and a door plate shaft need to be connected through a coupler, common flexible couplers are generally used, but the coupler has the requirements of installation position setting and connection reliability besides the problem of precision, so that the size and the weight of the electronic throttle valve device are increased, and meanwhile, the use cost is also increased.

Therefore, the electronic air intake system which seeks for simplification and miniaturization not only improves the whole applicability and economy, but also increases the reliability and safety of the whole machine to a certain extent, and can reduce the system cost.

Disclosure of Invention

The present invention is directed to provide an electronic throttle body and a control method thereof, which is small in size, light in weight and low in development cost.

In order to achieve the purpose, the 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 transmission 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 located 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 gas flow at the outlet end of the gas inlet channel is controlled by controlling the opening angle of the throttle plate.

The transmission mechanism is a coupling disc and comprises at least one limiting hole and at least one limiting column, and transmission is realized through cooperation between the limiting hole and the limiting column by the coupling disc. The limiting hole is in clearance fit with the limiting column, the single-side clearance of the limiting hole is not larger than 0.1mm, and the limiting column is arranged in the limiting hole. The limiting hole is an elliptical hole 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 attached to the limiting hole, and the spring force direction of the tensioning spring is opposite to the opening force direction of the door panel.

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

The control mode of the electronic throttle valve comprises the following steps that the ECU control system obtains an air inflow required value through engine load and sends a required signal to the electronic throttle valve in a PWM wave form;

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

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

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

The invention is described in further detail below with reference to the figures and the specific embodiments, but the invention is not limited thereto.

Drawings

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

FIG. 2 is a schematic structural diagram of an embodiment of a coupling disc of an electronic throttle valve provided by 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 electronic throttle valve provided by the invention comprises a steering engine 100, an air inlet device 103, a transmission mechanism 101 and an ECU control system 109.

The intake device 103 includes a position sensor 104, an intake duct 110, and a door plate 105 engaged with the intake duct 110, the door plate 105 being disposed in the intake duct 110. The inlet duct 110 is connected to the engine system via a flange end face 106 with a threaded hole 106 a. The intake passage 110 is divided by a throttle plate 105.

The transmission 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 a steering engine controller 100, the driven rotating shaft 107 is connected with one end of a throttle plate 105 and located on a central shaft of the throttle plate 105, the two rotating shafts are connected through a coupling mechanism 200 and used for transmitting rotating torque, the throttle plate body controls the opening angle of the throttle plate 105 to control the gas flow at the outlet end of the air inlet channel 110, and the opening angle of the throttle plate 105 is detected through a position sensor 104 and fed back to an 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 111 and the threaded steering engine fixing column are used for mounting the steering engine controller 100 and the position sensor 104 respectively, and the steering engine controller 100 and the position sensor 104 are arranged on two sides of the air inlet device 103 respectively when seen from an assembly position.

Specifically, steering wheel controller 100 arranges in air inlet unit 103 one side, and steering wheel 100 passes through fixed column 112 installation to by bolt 113 locking, initiative pivot 108 is towards intake duct 110 one end. Signals of the steering engine 100 are led to the ECU control system 109 through signal lines to realize communication, the steering engine 100 is located at the upper end of the air inlet device 103 during installation and 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 is 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 rotating disc 203 installed on the driving rotating shaft 108, the limiting post 204 is designed on a lower rotating disc 202 installed on the driven rotating shaft 107, the coupling disc realizes transmission through cooperation between the limiting hole 201 and the limiting post 204, the limiting hole 201 is in clearance fit with the limiting post 204, the unilateral clearance is not greater than 0.1mm, and the limiting post 204 is installed in the limiting hole 201.

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

Furthermore, the gear mechanism 101 comprises a tension spring 115. The tension spring 115 makes the limit post 204 always cling to the limit hole 201, and the spring force direction of the tension spring 115 is opposite to the opening force direction of the door panel 105.

The control mode of the motor throttle valve comprises the following steps:

the ECU control system 109 acquires an intake air amount demand value by the engine load and sends a demand signal to the electronic throttle valve in the form of a PWM wave;

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 an 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 drive signal.

The above-mentioned embodiments are merely illustrative of the nature of the present invention, and do not limit the present invention. Any modifications, simplifications, or other alternatives made without departing from the principles of the present application are intended to be included within the scope of the present application.

The parts not referred to in this application are the same as or can be implemented using prior art.

Claims

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

2. The electronic throttle valve of claim 1, wherein the transmission 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.

3. The electronic throttle valve of claim 2, wherein the limiting hole is clearance-fitted with the limiting post, and the unilateral clearance is not more than 0.1 mm.

4. The electronic throttle valve as defined in claim 3, wherein the stopper hole is an elliptical hole to avoid radial interference with the stopper shaft.

5. The electronic throttle valve of claim 4, wherein the transmission mechanism comprises a tension spring, so that the position-limiting post is always close to the position-limiting hole, and the spring force direction of the tension spring is opposite to the opening force direction of the door plate.