CN220470075U - Highly integrated general purpose engine three-fuel electronic injection system - Google Patents

Abstract

The utility model relates to the technical field of combustion engines, in particular to a highly integrated general gasoline engine three-fuel electronic injection system which comprises a throttle body main body, a high-pressure fuel injector, a fuel injector cap, a fuel inlet, an idle speed adjusting screw, a low-pressure fuel inlet, a low-pressure fuel stepping motor, an ECU (electronic control unit) component, a built-in throttle body stepping motor, an air inlet temperature detecting head and a throttle opening sensor, wherein the throttle body main body is provided with a throttle opening sensor; according to different working conditions, the ECU component sends out instructions to control the stepping motor of the built-in throttle body to act, controls the butterfly valve to switch, enables air to enter the valve body and then enter the engine, and controls the high-pressure fuel injector to spray gasoline with proper flow according to the air entering quantity, so that the working condition requirements are met; adding a low-pressure fuel passage, and controlling the supply of different fuels through an ECU assembly; the structural forms of the low pressure sensor and the fixing screw are canceled; therefore, the integration and the compactness of the throttle body assembly can be realized, and the multi-fuel supply can be satisfied.

Description

Highly integrated general purpose engine three-fuel electronic injection system

Technical Field

The utility model relates to the technical field of combustion engines, in particular to a three-fuel electronic injection system of a highly integrated general purpose engine.

Background

The traditional general gasoline engine adopts a carburetor as a fuel supply system, and with the strict requirement of the general emission regulation fourth-period standard, the general gasoline engine gradually adopts a throttle body electronic injection system as the fuel supply system.

However, an electronic injection system of a throttle body of a common general-purpose engine adopts split type sensor assembly, adopts an independent low-pressure sensor and a fixing screw, has a complex valve body structure, is heavy in weight, has a plurality of processing procedures, has low integration level, has a large volume and cannot be applied to a compact engine. The traditional general engine adopts gasoline as fuel energy, is used as a household general mechanical product, and single fuel can not meet the requirements of various fuels in the market, so that the application is relatively narrow. In the market where LNG and CNG fuels are popular, they cannot be widely used.

Disclosure of Invention

The utility model aims to provide a highly integrated general gasoline engine three-fuel electronic injection system which can realize integration and compactness of a throttle body assembly and meet the requirement of multi-fuel supply.

In order to achieve the above purpose, the utility model provides a highly integrated general gasoline engine three-fuel electronic injection system, which comprises a throttle body main body, a high-pressure fuel injector, a fuel injector cap, a fuel inlet, an idle speed adjusting screw, a low-pressure fuel inlet, a low-pressure fuel stepping motor, an ECU component, a built-in throttle body stepping motor, an air inlet temperature detecting head and a throttle opening sensor;

the throttle body main body is provided with two intake pressure sensor collection ports, a low-pressure gas negative pressure collection channel and an ECU low-pressure fuel pressure collection point; the two intake pressure sensor acquisition ports are positioned in the throttle body main body; the low-pressure gas negative pressure acquisition channel is positioned in the throttle body main body; the ECU low-pressure fuel pressure acquisition point is positioned in the throttle body main body; the high-pressure fuel injector is communicated with one side of the throttle body main body; the oil sprayer cap is communicated with one side of the high-pressure oil sprayer; the fuel inlet is communicated with one side of the fuel injector cap; the idle speed adjusting screw is arranged on one side of the throttle body main body; the low-pressure fuel inlet is communicated with one side of the throttle body main body; the low-pressure gas stepping motor is arranged on one side of the throttle body main body; the ECU component is arranged on one side of the throttle body main body; the built-in throttle valve body stepping motor is arranged in the throttle valve body main body; the air inlet temperature probe is arranged in the throttle body main body; the throttle opening sensor is arranged inside the throttle body main body.

Wherein, the ECU assembly comprises an ECU body and a low pressure sensor; the ECU body is arranged on one side of the throttle body main body; the low pressure sensor is disposed on the ECU body.

The low-pressure gas stepping motor comprises a stepping motor body and a motor cone; the stepping motor body is arranged on one side of the throttle body main body; the motor cone head is arranged at the output end of the stepping motor body.

According to the highly integrated general gasoline engine three-fuel electronic injection system, when the general gasoline engine selects the fuel as gasoline, the fuel enters the fuel injector cap from the fuel inlet and is injected into the cylinder body through the high-pressure fuel injector so as to meet the working condition; when the general gasoline engine selects the fuel to be LNG or CNG, the fuel is sucked into the cylinder body through a stepping motor switch passage after entering from the low-pressure fuel inlet so as to meet the working condition; and controlling the flow rate of the low-pressure fuel through the low-pressure fuel stepping motor; according to different working conditions, the ECU component sends out instructions to control the stepping motor of the built-in throttle body to act, controls the butterfly valve switch to enable air to enter the valve body so as to enter the engine, and controls the high-pressure fuel injector to spray gasoline with proper flow according to the air entering quantity, so that the working condition requirements are met; on the basis of the current single fuel, a channel of low-pressure fuel is added, and the supply of different fuels is controlled through the ECU component; the structural forms of the low pressure sensor and the fixing screw are canceled; by adopting the mode, the integration and the compactness of the throttle body assembly can be realized, and the multi-fuel supply can be satisfied.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

Fig. 1 is a schematic overall structure of a highly integrated all-in-one three fuel electronic injection system of the present utility model.

FIG. 2 is a cross-sectional view of the entirety of a highly integrated all-in-one three fuel electronic fuel injection system of the present utility model.

FIG. 3 is another cross-sectional view of the entirety of a highly integrated all-in-one three fuel electronic fuel injection system of the present utility model.

FIG. 4 is another cross-sectional view of the entirety of a highly integrated all-in-one three fuel electronic fuel injection system of the present utility model.

Fig. 5 is a schematic structural view of the ECU assembly of the present utility model.

1-throttle body main part, 2-high pressure fuel injector, 3-fuel injector cap, 4-fuel import, 5-idle speed adjusting screw, 6-low pressure fuel import, 7-low pressure fuel stepper motor, 8-ECU subassembly, 9-built-in throttle body stepper motor, 10-air inlet temperature detecting head, 11-throttle opening sensor, 12-air inlet pressure sensor collection mouth, 13-low pressure fuel negative pressure collection passageway, 14-ECU low pressure fuel pressure collection point, 15-ECU body, 16-low pressure sensor, 17-stepper motor body, 18-motor cone head.

Detailed Description

Referring to fig. 1-5, fig. 1 is a schematic diagram of an overall structure of a highly integrated all-in-one three-fuel electronic injection system according to the present utility model, fig. 2 is a cross-sectional view of an overall structure of a highly integrated all-in-one three-fuel electronic injection system according to the present utility model, fig. 3 is another cross-sectional view of an overall structure of a highly integrated all-in-one three-fuel electronic injection system according to the present utility model, fig. 4 is another cross-sectional view of an overall structure of a highly integrated all-in-one three-fuel electronic injection system according to the present utility model, and fig. 5 is a schematic diagram of an ECU assembly according to the present utility model.

The utility model provides a highly integrated general gasoline engine three-fuel electronic injection system which comprises: the throttle valve comprises a throttle valve body main body 1, a high-pressure fuel injector 2, a fuel injector cap 3, a fuel inlet 4, an idle speed adjusting screw 5, a low-pressure fuel inlet 6, a low-pressure fuel stepping motor 7, an ECU assembly 8, a built-in throttle valve body stepping motor 9, an air inlet temperature detecting head 10 and a throttle valve opening sensor 11; the throttle body main body 1 is provided with two intake pressure sensor collection ports 12, a low-pressure fuel negative pressure collection channel 13 and an ECU low-pressure fuel pressure collection point 14; the ECU assembly 8 includes an ECU body 15 and a low pressure sensor 16; the low-pressure gas stepper motor 7 comprises a stepper motor body 17 and a motor cone 18; through the scheme, the integration and the compactness of the throttle body assembly can be realized, and the multi-fuel supply is satisfied.

For the specific embodiment, the high-pressure fuel injector 2 is arranged on one side of the throttle body main body 1 in a communicating way; the oil sprayer cap 3 is communicated with one side of the high-pressure oil sprayer 2; the fuel inlet 4 is communicated with one side of the fuel injector cap 3; the idle speed adjusting screw 5 is arranged on one side of the throttle body main body 1; the low-pressure fuel inlet 6 is communicated with one side of the throttle body main body 1; the low-pressure gas stepping motor 7 is arranged on one side of the throttle body main body 1; the ECU component 8 is arranged on one side of the throttle body main body 1; the built-in throttle body stepping motor 9 is arranged inside the throttle body main body 1; the air inlet temperature detecting head 10 is arranged inside the throttle body main body 1; the throttle opening sensor 11 is provided inside the throttle body main body 1. When the general engine selects the fuel to be gasoline, the fuel enters the fuel injector cap 3 from the fuel inlet 4 and is injected into the cylinder body through the high-pressure fuel injector 2 so as to meet the working condition; when the general gasoline engine selects the fuel to be LNG or CNG, the fuel is sucked into the cylinder body through a stepping motor switch passage after entering from the low-pressure fuel inlet 6 so as to meet the working condition; and controls the low-pressure fuel flow rate by the low-pressure fuel stepping motor 7; according to different working conditions, the ECU component 8 sends out instructions to control the action of the stepping motor 9 of the built-in throttle body, controls the butterfly valve to switch, and enables air to enter the valve body so as to enter the engine, and according to the air entering quantity, the ECU controls the high-pressure fuel injector 2 to spray gasoline with proper flow so as to meet the working condition requirements; on the basis of the single fuel at present, a channel of low-pressure fuel is added, and the supply of different fuels is controlled through the ECU assembly 8; the structural form of the low pressure sensor 16 and the fixing screw is eliminated; by adopting the mode, the integration and the compactness of the throttle body assembly can be realized, and the multi-fuel supply can be satisfied.

Wherein the ECU body 15 is provided on the throttle body 1 side; the low pressure sensor 16 is provided on the ECU body 15. The ECU main body 15 incorporates an intake air pressure sensor, an intake air temperature sensor, the throttle opening sensor 11, and the low pressure sensor 16.

Secondly, the step motor body 17 is arranged at one side of the throttle body main body 1; the motor cone 18 is arranged at the output end of the stepping motor body 17. The stepper motor body controls the elevation of the motor cone 18 to control low pressure fuel flow.

According to the highly integrated general gasoline engine three-fuel electronic injection system, when the general gasoline engine selects the fuel as gasoline, the fuel enters the fuel injector cap 3 from the fuel inlet 4 and is injected into a cylinder body through the high-pressure fuel injector 2 so as to meet the working condition; when the general gasoline engine selects the fuel to be LNG or CNG, the fuel is sucked into the cylinder body through a stepping motor switch passage after entering from the low-pressure fuel inlet 6 so as to meet the working condition; and controls the low-pressure fuel flow rate by the low-pressure fuel stepping motor 7; according to different working conditions, the ECU component 8 sends out instructions to control the action of the stepping motor 9 of the built-in throttle body, controls the butterfly valve to switch, and enables air to enter the valve body so as to enter the engine, and according to the air entering quantity, the ECU controls the high-pressure fuel injector 2 to spray gasoline with proper flow so as to meet the working condition requirements; on the basis of the single fuel at present, a channel of low-pressure fuel is added, and the supply of different fuels is controlled through the ECU assembly 8; the structural form of the low pressure sensor 16 and the fixing screw is eliminated; the valve body has simple structure, lighter weight and less processing procedures; simple structure, fewer parts and low cost. The ECU assembly 8 employs two sets of injection and ignition control systems to meet the different combustion characteristics of the two fuel types. The transition between the two fuel types is seamless and can occur during operation.

The utility model has the beneficial effects that:

the system greatly simplifies the main structure, reduces mechanical parts, optimizes the product size and can meet more layout requirements; the ECU is highly integrated, so that the cost is reduced, the reliability of the product is improved, and the failure rate of the product is reduced; can meet the use requirement of multiple fuels (gasoline/LNG/CNG) and is convenient for the application of more use scenes.

The foregoing disclosure is only illustrative of one or more preferred embodiments of the present application and is not intended to limit the scope of the claims hereof, as it is to be understood by those skilled in the art that all or part of the process of implementing the described embodiment may be practiced otherwise than as specifically described and illustrated by the appended claims.

Claims (3)

1. A highly integrated general gasoline engine three-fuel electronic injection system is characterized in that,

the throttle valve comprises a throttle valve body main body, a high-pressure fuel injector, a fuel injector cap, a fuel inlet, an idle speed adjusting screw, a low-pressure fuel inlet, a low-pressure fuel stepping motor, an ECU (electronic control unit) component, a built-in throttle valve body stepping motor, an air inlet temperature detecting head and a throttle valve opening sensor;

the throttle body main body is provided with two intake pressure sensor collection ports, a low-pressure gas negative pressure collection channel and an ECU low-pressure fuel pressure collection point; the two intake pressure sensor acquisition ports are positioned in the throttle body main body; the low-pressure gas negative pressure acquisition channel is positioned in the throttle body main body; the ECU low-pressure fuel pressure acquisition point is positioned in the throttle body main body; the high-pressure fuel injector is communicated with one side of the throttle body main body; the oil sprayer cap is communicated with one side of the high-pressure oil sprayer; the fuel inlet is communicated with one side of the fuel injector cap; the idle speed adjusting screw is arranged on one side of the throttle body main body; the low-pressure fuel inlet is communicated with one side of the throttle body main body; the low-pressure gas stepping motor is arranged on one side of the throttle body main body; the ECU component is arranged on one side of the throttle body main body; the built-in throttle valve body stepping motor is arranged in the throttle valve body main body; the air inlet temperature probe is arranged in the throttle body main body; the throttle opening sensor is arranged inside the throttle body main body.

2. A highly integrated all-in-one three fuel electronic injection system as set forth in claim 1 wherein,

the ECU assembly comprises an ECU body and a low pressure sensor; the ECU body is arranged on one side of the throttle body main body; the low pressure sensor is disposed on the ECU body.

3. A highly integrated all-in-one three fuel electronic injection system as set forth in claim 2 wherein,

the low-pressure gas stepping motor comprises a stepping motor body and a motor cone; the stepping motor body is arranged on one side of the throttle body main body; the motor cone head is arranged at the output end of the stepping motor body.