CN114278443A

CN114278443A - Electric injection throttle body

Info

Publication number: CN114278443A
Application number: CN202210043628.4A
Authority: CN
Inventors: 范国平; 贺志强
Original assignee: Kko Chengdu Machine & Electron Co ltd
Current assignee: Kko Chengdu Machine & Electron Co ltd
Priority date: 2022-01-14
Filing date: 2022-01-14
Publication date: 2022-04-05

Abstract

The invention discloses an electronic injection throttle valve body which comprises a body (1), wherein a control system is arranged on the body (1), a motor (2) is fixed at the lower side end of the body (1), a throttle valve shaft actuating mechanism (3) is arranged between the output end of the motor (2) and the control system, the throttle valve shaft actuating mechanism (3) is positioned in the body (1), and a fuel injector mechanism (4) is also arranged outside the body (1); the control system comprises a shell (7) fixed on the body (1), a PCB (printed circuit board) is fixed in the shell (7), and the PCB (8) is electrically connected with a bus slot (9), a temperature sensor (10), a pressure sensor (11), a throttle opening position sensor (12), a circuit socket and a processing chip; the invention has the advantages of higher universality and stronger applicability.

Description

Electric injection throttle body

Technical Field

The invention relates to the field of engines, in particular to an electronic injection throttle valve body.

Background

The electronic injection throttle body is an important part in an electronic fuel injection system of a gasoline engine and is arranged on an air inlet manifold of the engine. Its main function is to control the various operating conditions of the engine by controlling the air flow rate drawn into the engine. The electronic injection throttle body comprises a throttle main channel for controlling air inflow and an idle air bypass channel. The throttle position sensor is arranged on a throttle shaft and used for detecting the opening of the throttle; the idle air control valve is installed on the idle air bypass passage, and automatically regulates the flow of air sucked into the engine according to the instruction of the engine control unit when the throttle valve is in a fully closed state during the idle running of the engine. Along with the improvement of energy conservation and emission reduction, economy and practicality of general engines at home and abroad, and the improvement of the requirements on small size, light weight, generalization and the like, the application degree of an electronic fuel injection system on most of the general engines at home is lower at present, and meanwhile, the electronic fuel injection system has the defects of low universality and the like on the applied general engine electronic fuel injection system.

In patent CN201710329934.3, an electronic injection throttle valve is disclosed, which comprises a body, a throttle shaft mounted on the body, an ECU plate and a motor, wherein the ECU plate is disposed in an accommodating chamber of the body, an intake temperature sensor is mounted at an intake end of a throat pipe of the body, the intake temperature sensor is connected to the ECU plate, the throttle shaft passes through the throat pipe, a magnet rocker arm is disposed at a lower end of the throttle shaft, a hall sensor is disposed on the ECU plate, a chip sensing center of the hall sensor and a magnet of the magnet rocker arm are coaxially disposed and have a gap, an annular groove is further disposed on the ECU plate, a motor rocker arm is connected to a shaft of the motor, the magnet rocker arm passes through the annular groove to be connected to the motor rocker arm, but opening adjustment in the electronic injection throttle valve is not suitable for a general-purpose engine.

In patent CN201320443296.5, an electronic injection throttle body is disclosed, which comprises a body (5), a throttle shaft (6), a throttle flap (7), a spiral frame assembly (1), a stepping motor (10) installed on the body (5) and connected to the other end of the throttle shaft (6), a torsion spring (3) disposed between the body (5) and the spiral frame assembly (1), and a limit screw (2) disposed on the body (5), and further comprises a shaft sleeve (4), wherein the shaft sleeve (4) is disposed on the throttle shaft (6) between the body (5) and the spiral frame assembly (1), the torsion spring (3) is sleeved on the shaft sleeve (4), the torsion spring (3) is a double torsion spring, one end of the torsion spring (3) is fixed on the body (5), and the other end of the torsion spring (3) is fixed on the spiral frame assembly (1); the bottom surface of the body (5) is provided with an air inlet manifold connecting surface (11). The invention has the advantages that: the torsional spring has high working reliability; the accurate return of the throttle valve sheet is ensured, but the invention is not suitable for a general engine.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide an electronic injection throttle valve body which meets the reliability requirement of an electronic injection system of a general engine, reduces the emission, and has higher universality and stronger applicability.

The purpose of the invention is realized by the following technical scheme:

an electrospray throttle body comprising:

the engine comprises a body 1, wherein a control system is arranged on the body 1, a motor 2 is fixed at the lower side end of the body 1, a throttle shaft actuating mechanism 3 is arranged between the output end of the motor 2 and the control system, the throttle shaft actuating mechanism 3 is positioned in the body 1, and a fuel injector mechanism 4 is also arranged outside the body 1; the control system comprises a shell 7 fixed on the body 1, a PCB 8 is fixed in the shell 7, and the PCB 8 is electrically connected with a bus slot 9, a temperature sensor 10, a pressure sensor 11, a throttle opening position sensor 12, a circuit socket and a processing chip; the shell 7 is made of resin, the shell 7 and the PCB 8 are packaged through epoxy resin glue pouring, a pressure tapping hole is formed in the shell 7, and the pressure sensor 11 corresponds to the pressure tapping hole.

Further, the throttle shaft actuating mechanism 3 comprises an adjusting component, a linkage component and a throttle opening component, and the output end of the motor 2 is connected with the throttle opening component through the linkage mechanism; the throttle valve opening component comprises a throttle valve shaft 5 fixed on the linkage mechanism, a throttle valve sheet 6 is movably arranged in the middle of the throttle valve shaft 5, a through hole is formed in the body 1, the throttle valve sheet 6 is located in the middle of the through hole, and the throttle valve sheet 6 is used for controlling whether two ends of the through hole are communicated or not.

Furthermore, a magnetic cylinder is embedded in the bottom of the shell, the upper side end of the throttle shaft is inserted into the magnetic cylinder, and an induction magnetic core is wrapped at the end part of the magnetic cylinder.

Further, ring groove has been seted up in the upper end outside of throttle shaft, be provided with D shape spacing groove in the magnetic cylinder, D shape spacing inslot wall has the inside bellied rib of a plurality of sections, ring groove suits with the rib, the last side end face of throttle shaft forms D shape incision, D shape incision suits with D shape spacing groove.

Further, the lower side end of the body is fixed with a bottom shell, the bottom shell forms an inner cavity, the inner cavity and the cavity in the body form an accommodating cavity, and the motor and the throttle shaft actuating mechanism are located in the accommodating cavity.

Further, the interlock subassembly is including being fixed in the throttle shaft suspension on the motor output shaft, fixed mounting has the motor rocking arm on the throttle shaft suspension, be fixed with the reset torsion spring on the motor rocking arm, the throttle shaft is located the reset torsion spring, the dog that upwards extends has on the throttle shaft suspension, the dog suits with adjusting part's output.

Furthermore, the adjusting component comprises an adjusting screw arranged on the body, a spring is sleeved on the adjusting screw, and the extending end of the adjusting screw is abutted to the end face of the stop block.

Furthermore, the oil sprayer mechanism comprises an oil spray nozzle, a sealing ring, an electric control plug and a high-pressure fuel oil input quick connector, and the oil sprayer mechanism is installed on the outer side of the body.

Furthermore, a through rectangular groove is formed in the middle of the throttle shaft, the throttle plate is placed in the rectangular groove and fixed through a flat head screw, two opposite yielding grooves are further formed in the outer wall of the throttle shaft, and the rectangular groove is located between the two yielding grooves.

The invention has the beneficial effects that:

the electronic injection throttle valve body integrates the temperature sensor, the pressure sensor and the throttle opening position sensor into a whole to form the modularization of a control system, so that the electronic injection throttle valve body has wider adaptability and universality; the electronic injection throttle valve body controls the rotation angle of the motor, so that the opening degree of the throttle valve shaft is adjusted through a transmission assembly between the motor and the throttle valve shaft actuating mechanism, a signal of the change of the opening degree is transmitted into a control system through an opening degree position sensor, and the oil injection quantity of the oil injector mechanism is adjusted to be matched with the air inflow quantity of the corresponding opening degree, so that the economical efficiency of fuel oil supply is ensured; the electronic injection throttle valve body reduces emission, and has higher universality and stronger applicability; compared with the prior art in the same field in China, the invention not only meets the general energy-saving and emission-reducing effects of a general electronic fuel injection system, but also has compact layout, small size, light weight and modularized subsystem, can adapt to various small-sized general engine application occasions such as a weeding machine, a small-sized generator, a sports beach vehicle and a large number of civil general generators, and has stronger adaptability to external severe working conditions such as temperature, humidity, dust and the like.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is an internal structural view of the control system;

FIG. 4 is a schematic view of a throttle shaft actuating mechanism;

FIG. 5 is a side view of the throttle shaft;

FIG. 6 is a top view of the throttle shaft;

fig. 7 is a schematic structural view of the magnetic cylinder.

In the figure, a body 1, a motor 2, a throttle shaft actuating mechanism 3, an oil injector mechanism 4, a throttle shaft 5, a circular clamping groove 51, a rectangular groove 52, a relief groove 53, a throttle plate 6, a shell 7, a PCB 8, a bus slot 9, a temperature sensor 10, a pressure sensor 11, a throttle opening position sensor 12, a magnetic cylinder 13, a rib 131, an induction magnetic core 14, a bottom shell 15, a throttle shaft suspension 16, a motor rocker arm 17, a reset torsion spring 18 and an adjusting screw 19.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In this embodiment, as shown in fig. 1 to 7, an electronic injection throttle body includes a body 1, a control system is disposed on the body 1, a motor 2 is fixed to a lower end of the body 1, a throttle shaft actuating mechanism 3 is disposed between an output end of the motor 2 and the control system, the throttle shaft actuating mechanism 3 is located in the body 1, and an injector mechanism 4 is further disposed outside the body 1; the control system comprises a shell 7 fixed on the body 1, a PCB 8 is fixed in the shell 7, and the PCB 8 is electrically connected with a bus slot 9, a temperature sensor 10, a pressure sensor 11, a throttle opening position sensor 12, a circuit socket and a processing chip; the shell 7 is made of resin, the shell 7 and the PCB 8 are packaged through epoxy resin glue pouring, a pressure tapping hole is formed in the shell 7, and the pressure sensor 11 corresponds to the pressure tapping hole.

An air inlet temperature sensor is installed at the air inlet end of the throat pipe of the body 1, a processing chip of the air inlet temperature sensor is installed on the PCB 8, an air inlet pressure sensor sensing port is formed in the engine connecting end of the body 1, and a pressure sensor processing chip communicated with the sensing port is installed on the PCB 8.

Through the arrangement of the embodiment, the processing chip can be more effectively protected, and the influence of water, oil and dust on the chip due to external signal corrosion under severe working condition environment is avoided; the shell 7 is provided with a drain hole for draining water and oil condensed by water vapor and oil mist entering the shell 7 from the external environment, so that the water and the oil are prevented from entering the throat hole to influence the air inlet purity.

In the embodiment, the temperature, pressure and position sensors are integrated in the shell 7 in a three-in-one mode, and a modularized whole is formed by glue pouring and sealing, so that the influence of the external environment on the processing chip in the shell 7 can be effectively isolated, the universal adaptability and interchangeability of the control system can be improved, the temperature sensor 10, the pressure sensor 11 and the throttle opening position sensor 12 are integrated in a three-in-one mode, and the modularization of the control system is formed, so that the control system has more extensive adaptability and universality; a hall type throttle opening position sensor (TPS) 12 is arranged on the PCB 8 in the housing 7, and a gap is formed between the center of an induction chip of the hall type throttle opening position sensor 12 and the magnetic cylinder 13.

The pressure tapping hole position corresponding to the pressure sensor 11 is provided with a rubber sealing ring, the shell 7 is further provided with a temperature sensor probe hole corresponding to the temperature sensor 10, and the position of the temperature sensor probe hole is also provided with the rubber sealing ring, so that water and oil in the working environment can be prevented from entering the shell through the pressure tapping hole and the temperature sensor probe hole.

The invention is further configured to: the throttle shaft actuating mechanism 3 comprises an adjusting component, a linkage component and a throttle opening component, and the output end of the motor 2 is connected with the throttle opening component through the linkage mechanism; the throttle valve opening component comprises a throttle valve shaft 5 fixed on the linkage mechanism, a throttle valve sheet 6 is movably arranged in the middle of the throttle valve shaft 5, a through hole is formed in the body 1, the throttle valve sheet 6 is located in the middle of the through hole, and the throttle valve sheet 6 is used for controlling whether two ends of the through hole are communicated or not.

The motor 2 is fixed on the lower side of the mounting piece through a bolt;

the invention is further configured to: the bottom of the shell 7 is embedded with a magnetic cylinder 13, the upper side end of the throttle shaft 5 is inserted into the magnetic cylinder 13, and the end part of the magnetic cylinder 13 is wrapped with an induction magnetic core 14.

In the embodiment, the induction magnetic core of the throttle shaft 5 opening position sensor is integrated in the throttle shaft actuating mechanism, so that the motor 2, the throttle shaft actuating mechanism and the opening position magnetic induction achieve functional integration, the layout is integrated, the basic transmission function can be met, the layout is compact, the structure is modularized, and the interchangeability and the adaptability of the similar design are enhanced; the magnetic cylinder 13 is a circular resin magnetic cylinder.

The invention is further configured to: annular groove 51 has been seted up in the upper end outside of throttle shaft 5, be provided with D shape spacing groove in the magnetic cylinder 13, D shape spacing inslot wall has the inside bellied rib 131 of a plurality of sections, annular groove 51 suits with rib 131, the last side end face of throttle shaft 5 forms D shape incision, D shape incision suits with D shape spacing groove.

In this embodiment, the magnetic cylinder 13 is matched with the annular clamping groove 51 and the D-shaped notch on the throttle shaft 5 through the rib 131 and the D-shaped limiting groove, and the annular long-strip-shaped rib 131 is arranged on the assembly fitting surface of the D-shaped limiting groove of the magnetic cylinder 13 and the throttle shaft 5, so that the matching error is reduced, and the transmission is more flexible.

The invention is further configured to: the lower side end of the body 1 is fixedly provided with a bottom shell 15, the bottom shell 15 forms an inner cavity, the inner cavity and a cavity in the body 1 form an accommodating cavity, and the motor 2 and the throttle shaft actuating mechanism 3 are located in the accommodating cavity.

The invention is further configured to: the linkage component comprises a throttle shaft suspension 16 fixed on an output shaft of the motor 2, a motor rocker arm 17 is fixedly mounted on the throttle shaft suspension 16, a reset torsion spring 18 is fixed on the motor rocker arm 17, the throttle shaft 5 is positioned in the reset torsion spring 18, a stop block extending upwards is arranged on the throttle shaft suspension 16, and the stop block is matched with the output end of the adjusting component.

In this embodiment, the throttle shaft suspension 16 is provided with a motor rocker arm 17, and the transmission rocker arm 17 is provided with a square slot matched with the output shaft of the motor 2; the motor 2 transmits the rotation action to the throttle shaft 5 through a motor rocker arm 17 and a throttle shaft suspension bracket 16 to control the opening angle of the throttle blade 6; the lower end of the reset torsion spring 18 is fixed on the motor rocker arm 17, and the upper end of the reset torsion spring 18 is fixed in the body 1.

A return spring and a stop pin are further arranged between the motor rocker arm 17 and the throttle shaft suspension 16, so that rotation errors caused by slight vibration in the transmission process are eliminated, and the transmission stability is effectively guaranteed.

The invention is further configured to: the adjusting component comprises an adjusting screw 19 arranged on the body 1, a spring 20 is sleeved on the adjusting screw 19, and the extending end of the adjusting screw 19 is abutted to the end face of the stop block.

The initial opening of the throttle blade 6 is made adjustable by the setting of the adjustment screw 19.

The invention is further configured to: the oil sprayer mechanism 4 comprises an oil spray nozzle, a sealing ring, an electric control plug and a high-pressure fuel input quick connector, and the oil sprayer mechanism 4 is installed on the outer side of the body 1.

And the electric signal processing units of the motor 2 and the oil sprayer mechanism are arranged on the PCB 8.

The invention is further configured to: the middle part of the throttle shaft 5 is provided with a through rectangular groove 52, the throttle sheet 6 is placed in the rectangular groove 52 and fixed through a flat head screw, the outer wall of the throttle shaft 5 is further provided with two opposite yielding grooves 53, and the rectangular groove 52 is positioned between the two yielding grooves 53.

The working principle of the invention is as follows:

when the engine works, the control system automatically processes signals from the air inlet pressure sensor 11 and the temperature sensor 10 according to the change of the engine load, controls the rotation angle of the motor 2, further adjusts the opening degree of the throttle shaft 5 through a transmission component between the motor 2 and the throttle shaft actuating mechanism, the signal of the change of the opening degree is transmitted to the control system through the opening position sensor 12, further adjusts the oil injection quantity of the oil injector mechanism 4 to be matched with the air inflow of the corresponding opening degree, and the economical efficiency of fuel oil supply is ensured; the rotation of the output shaft of the motor 2 drives the rotation of the motor rocker arm 17, and the rotation is simultaneously transmitted to the throttle shaft suspension 16 to drive the throttle shaft 5 to rotate correspondingly so as to adjust the opening of the throttle plate 6.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "left", "right", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, or orientations or positional relationships that the products of the present invention are usually placed in when used, or orientations or positional relationships that are usually understood by those skilled in the art, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the equipment or the elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance. In the description of the present invention, it is also to be noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Claims

1. An electronic injection throttle body, comprising:

the automatic control device comprises a body (1), wherein a control system is arranged on the body (1), a motor (2) is fixed at the lower side end of the body (1), a throttle shaft actuating mechanism (3) is arranged between the output end of the motor (2) and the control system, the throttle shaft actuating mechanism (3) is positioned in the body (1), and a fuel injector mechanism (4) is also arranged outside the body (1); the control system comprises a shell (7) fixed on the body (1), a PCB (printed circuit board) is fixed in the shell (7), and the PCB (8) is electrically connected with a bus slot (9), a temperature sensor (10), a pressure sensor (11), a throttle opening position sensor (12), a circuit socket and a processing chip; the shell (7) is made of resin, the shell (7) and the PCB (8) are encapsulated through epoxy resin glue filling, a pressure tapping hole is formed in the shell (7), and the pressure sensor (11) corresponds to the pressure tapping hole.

2. An electrospray throttle body according to claim 1, characterized in that: the throttle shaft actuating mechanism (3) comprises an adjusting component, a linkage component and a throttle opening component, and the output end of the motor (2) is connected with the throttle opening component through the linkage mechanism; the throttle valve sheet opening component comprises a throttle valve shaft (5) fixed on the linkage mechanism, a throttle valve sheet (6) is movably arranged in the middle of the throttle valve shaft (5), a through hole is formed in the body (1), the throttle valve sheet (6) is located in the middle of the through hole, and whether the two ends of the throttle valve sheet (6) used for controlling the through hole are communicated or not is determined.

3. An electrospray throttle body according to claim 1, characterized in that: the bottom of the shell (7) is embedded with a magnetic cylinder (13), the upper side end of the throttle shaft (5) is inserted into the magnetic cylinder (13), and the end part of the magnetic cylinder (13) is wrapped with an induction magnetic core (14).

4. An electrospray throttle body according to claim 3, characterized in that: annular groove (51) have been seted up in the upper end outside of throttle shaft (5), be provided with D shape spacing groove in magnet jar (13), D shape spacing inslot wall has inside bellied rib (131) of a plurality of sections, annular groove (51) suit with rib (131), the upside end terminal surface shape of throttle shaft (5) forms D shape incision, D shape incision and D shape spacing groove suit.

5. An electrospray throttle body according to claim 1, characterized in that: bottom shell (15) are fixed to the lower extreme of body (1), bottom shell (15) form the inner chamber, the inner chamber forms the holding chamber with the cavity in body (1), motor (2) and throttle shaft actuating mechanism (3) are located the holding intracavity.

6. An electrospray throttle body according to claim 2, characterized in that: the linkage assembly comprises a throttle shaft suspension (16) fixed on an output shaft of the motor (2), a motor rocker (17) is fixedly mounted on the throttle shaft suspension (16), a reset torsion spring (18) is fixed on the motor rocker (17), the throttle shaft (5) is located in the reset torsion spring (18), a stop block extending upwards is arranged on the throttle shaft suspension (16), and the stop block is matched with the output end of the adjusting assembly.

7. An electrospray throttle body according to claim 2, characterized in that: the adjusting assembly comprises an adjusting screw (19) which penetrates through the body (1), a spring (20) is sleeved on the adjusting screw (19), and the extending end of the adjusting screw (19) is abutted to the end face of the stop block.

8. An electrospray throttle body according to claim 1, characterized in that: the fuel injector mechanism (4) comprises a fuel injection nozzle, a sealing ring, an electric control plug and a high-pressure fuel input quick connector, and the fuel injector mechanism (4) is installed on the outer side of the body (1).

9. An electrospray throttle body according to claim 2, characterized in that: the middle part of throttle shaft (5) is seted up rectangular channel (52) that runs through, throttle piece (6) are placed in rectangular channel (52) and are fixed through the grub screw, two relative groove of stepping down (53) have still been seted up to the outer wall of throttle shaft (5), rectangular channel (52) are located between two groove of stepping down (53).