CN210686135U - Idle speed adjusting device - Google Patents
Idle speed adjusting device Download PDFInfo
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- CN210686135U CN210686135U CN201921846936.0U CN201921846936U CN210686135U CN 210686135 U CN210686135 U CN 210686135U CN 201921846936 U CN201921846936 U CN 201921846936U CN 210686135 U CN210686135 U CN 210686135U
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- idle speed
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- speed adjustment
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Abstract
The utility model provides an idle speed adjusting device, which relates to the technical field of engine calibration and comprises a carburetor body, wherein the carburetor body is provided with a throttle passage, and a throttle valve is arranged in the throttle passage; the idle oil supply channel is arranged beside the throttle channel, and the lower end of the idle oil supply channel is communicated with the throttle channel through an idle oil outlet; the idling air supply channel is arranged on one side, far away from the gas saving channel, of the idling oil supply channel, the idling air supply channel is communicated with the gas saving channel through an idling air outlet, and the idling air outlet is arranged below the idling oil outlet; the through hole penetrates through the idle air supply channel and the idle oil supply channel and is concentric with the idle oil outlet; and the idle speed adjusting mechanism is arranged in the through hole and is connected with the through hole through an adjustable structure, and a plurality of radial through holes corresponding to the idle speed air supply channel are circumferentially arranged in the middle of the idle speed adjusting mechanism. Through adjusting the idle speed adjusting structure, the oil supply quantity and the air supply quantity can be adjusted simultaneously, idle speed adjustment is realized, and convenience and rapidness are realized.
Description
Technical Field
The utility model relates to an engine calibration technical field especially relates to an idle speed adjusting device.
Background
The implementation of strict national six emission regulations, in which the PN (particulate matter emission) emission limit is increased under WLTC cycle conditions, is very challenging for the engine management system, and if the national five-stage ECU calibration is still adopted, the emission limit standard cannot be reached, so what technical measures are taken to effectively deal with the national six emissions, and in particular how to reduce the PN emission becomes more and more important.
The idling condition is a state in which the engine is operated at the lowest stable rotational speed without applying work to the outside. The purpose of the complete disengagement of the engine from the drive train is to maintain the engine in a continuous, smooth operation at a relatively low speed and to provide operating power for other auxiliary devices, such as air conditioners, power steering devices, etc., which are suddenly turned on or off, to keep the engine speed stable within a certain speed range. The idling working condition is one of the important working conditions of the engine, and the particulate matter emission can be effectively reduced by improving the combustion condition of the idling working condition of the engine.
In the prior art, idle engine air inlet is provided by arranging a bypass air passage beside a throttle valve, when the idle speed is adjusted, the engine air inlet and the corresponding oil supply amount need to be respectively and repeatedly adjusted to obtain a proper air-fuel ratio, and the adjustment process is complicated.
SUMMERY OF THE UTILITY MODEL
To the problem that exists among the prior art, the utility model provides an idle speed adjusting device specifically includes:
the carburetor body is provided with a throttle channel, and a throttle valve is arranged in the throttle channel;
the idle oil supply channel is arranged beside the throttle channel, and the lower end of the idle oil supply channel is communicated with the throttle channel through an idle oil outlet;
the idling air supply channel is arranged on one side, far away from the gas saving channel, of the idling oil supply channel, the idling air supply channel is communicated with the gas saving channel through an idling air outlet, and the idling air outlet is arranged below the idling oil outlet;
the through hole penetrates through the idle air supply channel and the idle oil supply channel and is concentric with the idle oil outlet;
the idle speed adjusting mechanism is arranged in the through hole and connected with the through hole through an adjustable structure, and a plurality of radial through holes corresponding to the idle speed air supply channel are circumferentially arranged in the middle of the idle speed adjusting mechanism.
Preferably, the idle speed adjusting mechanism is an idle speed adjusting screw.
Preferably, the adjustable structure is a threaded connection structure between internal threads arranged on the inner wall of the through hole and the idle speed adjusting screw.
Preferably, the idle speed adjusting mechanism is an idle speed adjusting shaft, and the idle speed adjusting shaft is connected with an external driving motor.
Preferably, the adjustable structure is a sliding connection structure arranged between a slide way on the inner wall of the through hole and the idle speed adjusting shaft.
Preferably, the bottom of the idle speed adjusting mechanism is a cone.
Preferably, the diameter of the radial through hole close to the cone is larger than the diameter of the radial through hole far from the cone.
Preferably, one side of the idle oil outlet facing the idle oil supply passage is a conical surface corresponding to the conical body.
The technical scheme has the following advantages or beneficial effects:
1) by adjusting the idle speed adjusting structure, the oil supply quantity and the air supply quantity can be adjusted at the same time, so that the idle speed adjustment is realized, and the operation is convenient and fast;
2) the idling of the engine is calibrated through the idling adjusting device, the combustion condition of the starting working condition of the engine can be improved, and the emission of particulate matters is reduced.
Drawings
Fig. 1 is a schematic structural diagram of an idle speed adjustment device according to a preferred embodiment of the present invention;
fig. 2 is a schematic diagram of the relationship between idle speed and particulate matter emission in a preferred embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The present invention is not limited to this embodiment, and other embodiments may also belong to the scope of the present invention as long as the gist of the present invention is satisfied.
In a preferred embodiment of the present invention, based on the above problems existing in the prior art, an idle speed adjustment device is provided, as shown in fig. 1, specifically including:
the carburetor comprises a carburetor body 1, wherein the carburetor body 1 is provided with a throttle channel 11, and a throttle valve 12 is arranged in the throttle channel 11;
the idle oil supply channel 2 is arranged beside the throttle channel 11, and the lower end of the idle oil supply channel 2 is communicated with the throttle channel 11 through an idle oil outlet 21;
the idling air supply channel 3 is arranged on one side, far away from the gas saving channel 11, of the idling oil supply channel 2, the idling air supply channel 3 is communicated with the gas saving channel 11 through an idling air outlet 31, and the idling air outlet 31 is arranged below the idling oil outlet 21;
the through hole 4 penetrates through the idle air supply channel 3 and the idle oil supply channel 2, and the through hole 4 is concentric with the idle oil outlet 21;
the idle speed adjusting mechanism 5 is arranged in the through hole 4 and connected with the through hole 4 through an adjustable structure, and a plurality of radial through holes 51 corresponding to the idle speed air supply channel 3 are circumferentially arranged in the middle of the idle speed adjusting mechanism 5.
Specifically, in the present embodiment, when the engine is in the idle operating condition, part of air is also introduced into the idle oil supply passage 2, but the proportion of the relative oil supply amount is small, which is likely to cause unsatisfactory combustion condition and increase particulate matter emission, and therefore, while the oil supply amount is ensured, the air intake amount needs to be adjusted to obtain a suitable idle air-fuel ratio. Preferably, in the present embodiment, the idle air supply passage 3 is disposed beside the idle oil supply passage 2 and is penetrated by the through hole 4, so that the idle speed adjustment mechanism 5 can adjust the oil supply amount and the intake air amount at the same time.
When idling needs to be turned down, the engine is likely to stall if only the fuel supply amount is reduced, and fuel combustion is insufficient if only the intake air amount is reduced, and particulate matter emission increases. In the embodiment, the idle speed adjusting mechanism 5 is adjusted towards the direction of the throttle channel 11, so that the gap between the bottom end of the idle speed adjusting mechanism 5 and the idle speed oil outlet 21 is reduced, and the oil supply amount flowing to the throttle channel 11 can be effectively reduced; meanwhile, due to the adjustment of the idle speed adjusting mechanism 5, the radial through hole 51 on the idle speed adjusting mechanism 5 is partially shielded, so that the air entering the air throttle channel 11 in the idle speed air supply channel 3 is correspondingly reduced, the air inflow flowing to the air throttle channel 11 is effectively reduced, and further the idle speed is adjusted to be low.
When the idling needs to be adjusted high, fuel combustion is insufficient and particulate matter emission is increased if only the fuel supply amount is increased, and the engine is likely to stall if only the intake air amount is increased. In the embodiment, the idle speed adjusting mechanism 5 is adjusted in the direction departing from the throttle channel 11, so that the gap between the bottom end of the idle speed adjusting mechanism 5 and the idle speed oil outlet 21 is increased, and the oil supply amount flowing to the throttle channel 11 can be effectively increased; meanwhile, due to the adjustment of the idle speed adjusting mechanism 5, the radial through hole 51 on the idle speed adjusting mechanism 5 is communicated with the idle speed air supply channel 3, so that the air entering the air throttle channel 11 in the idle speed air supply channel 3 is correspondingly increased, the air inflow flowing to the air throttle channel 11 is effectively increased, and the idle speed is increased.
In the preferred embodiment of the present invention, the idle adjustment mechanism 5 is an idle adjustment screw.
In a preferred embodiment of the present invention, the adjustable structure is a threaded connection structure between the internal thread of the inner wall of the through hole 4 and the idle adjustment screw.
Specifically, in the present embodiment, the idle speed is adjusted to be low by the screwing operation and to be high by the screwing operation.
The present invention is preferably configured such that the idle speed adjusting mechanism 5 is an idle speed adjusting shaft, and the idle speed adjusting shaft is connected to an external driving motor.
Specifically, in the present embodiment, the idle speed adjusting shaft moves towards the idle oil outlet 21 to adjust the idle speed low and moves away from the idle oil outlet 21 to adjust the idle speed high under the action of the driving motor.
In a preferred embodiment of the present invention, the adjustable structure is a sliding connection structure between the slide way disposed on the inner wall of the through hole 4 and the idle adjustment shaft 52.
In the preferred embodiment of the present invention, the bottom of the idle speed adjusting mechanism 5 is a cone.
In the preferred embodiment of the present invention, as shown in fig. 1, the diameter of the radial through hole 51 close to the cone is larger than the diameter of the radial through hole 51 far from the cone.
Specifically, in the present embodiment, the diameter of the radial through hole 51 close to the cone is larger than the diameter of the radial through hole 51 far from the cone, so that when the idle speed adjustment mechanism 5 moves towards the idle oil outlet 21, the radial through hole 51 with the larger diameter is shielded, and air flows into the throttle passage 11 through the radial through hole 51 with the smaller diameter, thereby effectively reducing the air intake amount. When the idle speed adjusting mechanism 5 moves away from the idle speed oil outlet 21, the radial through hole 51 with the larger diameter is communicated with the idle speed air supply channel 3, and air flows into the throttle channel 11 through the radial through hole 51 with the larger diameter, so that the air intake amount is effectively increased.
In the preferred embodiment of the present invention, as shown in fig. 1, the side of the idle oil outlet 21 facing the idle oil supply passage 2 is a conical surface 211 corresponding to the cone.
Specifically, in the present embodiment, the side of the idle oil outlet 21 facing the idle oil supply channel 2 is a conical surface 211 corresponding to the conical body, so that when the idle speed adjusting mechanism 5 moves towards the idle oil outlet 21, the bottom of the idle speed adjusting mechanism 5 is not damaged or a notch or the like occurs due to an excessively large moving distance, thereby affecting the precise control of the oil supply amount.
The utility model discloses an embodiment of a preferred, through idling adjustment mechanism 5 with the idling rotational speed of engine by 800rpm rising to 850rpm, rise to 5deg from 0deg with the angle of advance of igniting, effectively improve the engine combustion condition, as shown in fig. 2, wherein the solid line is that the idling is 800rpm, when the angle of advance of igniting is 0deg, particulate matter emission during the idle operating mode, the dotted line is that the idling is 850rpm, someWhen the fire advance angle is 5deg, the particle discharge amount under the idle working condition can be regulated from 6 multiplied by 10 through experimental verification11The/kwh is reduced to 4.5X 1011And the/kwh meets the emission standard of the national six, so that the method can be used as a calibration strategy of the engine.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and it should be understood that all modifications and obvious variations of the present invention as described and illustrated herein are included within the scope of the present invention.
Claims (8)
1. An idle speed adjustment device, characterized by specifically including:
the carburetor body is provided with a throttle channel, and a throttle valve is arranged in the throttle channel;
the idle oil supply channel is arranged beside the throttle channel, and the lower end of the idle oil supply channel is communicated with the throttle channel through an idle oil outlet;
the idling air supply channel is arranged on one side, far away from the gas saving channel, of the idling oil supply channel, the idling air supply channel is communicated with the gas saving channel through an idling air outlet, and the idling air outlet is arranged below the idling oil outlet;
the through hole penetrates through the idle air supply channel and the idle oil supply channel and is concentric with the idle oil outlet;
the idle speed adjusting mechanism is arranged in the through hole and connected with the through hole through an adjustable structure, and a plurality of radial through holes corresponding to the idle speed air supply channel are circumferentially arranged in the middle of the idle speed adjusting mechanism.
2. The idle speed adjustment device of claim 1, wherein the idle speed adjustment mechanism is an idle speed adjustment screw.
3. The idle speed adjustment device of claim 2, wherein the adjustable structure is a threaded connection of internal threads provided on an inner wall of the through hole and the idle speed adjustment screw.
4. The idle speed adjustment device of claim 1 wherein the idle speed adjustment mechanism is an idle speed adjustment shaft and the idle speed adjustment shaft is coupled to an external drive motor.
5. The idle speed adjustment device of claim 4, wherein the adjustable structure is a sliding connection between a slide track disposed on an inner wall of the through hole and the idle speed adjustment shaft.
6. The idle speed adjustment device of claim 1, wherein the bottom of the idle speed adjustment mechanism is conical.
7. The idle speed adjustment device of claim 6, wherein the diameter of the radial through bore proximal to the cone is greater than the diameter of the radial through bore distal to the cone.
8. The idle speed adjustment device of claim 6 wherein a side of the idle oil outlet facing the idle oil supply passage is a conical surface corresponding to the cone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921846936.0U CN210686135U (en) | 2019-10-30 | 2019-10-30 | Idle speed adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921846936.0U CN210686135U (en) | 2019-10-30 | 2019-10-30 | Idle speed adjusting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210686135U true CN210686135U (en) | 2020-06-05 |
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ID=70899514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921846936.0U Active CN210686135U (en) | 2019-10-30 | 2019-10-30 | Idle speed adjusting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210686135U (en) |
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2019
- 2019-10-30 CN CN201921846936.0U patent/CN210686135U/en active Active
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