CN201209482Y - Small-sized single-cylinder gasoline engine - Google Patents
Small-sized single-cylinder gasoline engine Download PDFInfo
- Publication number
- CN201209482Y CN201209482Y CNU2008200605930U CN200820060593U CN201209482Y CN 201209482 Y CN201209482 Y CN 201209482Y CN U2008200605930 U CNU2008200605930 U CN U2008200605930U CN 200820060593 U CN200820060593 U CN 200820060593U CN 201209482 Y CN201209482 Y CN 201209482Y
- Authority
- CN
- China
- Prior art keywords
- counterbore
- small
- single cylinder
- sized single
- oxygen sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Abstract
The utility model discloses a small-sized single cylinder gasoline engine which comprises an air inlet channel, an exhaust channel and a spark plug, wherein one side of the air discharge channel is provided with a counterbore; the counterbore is communicated with the air discharge channel through a threaded hole at one side of the counterbore; the internal diameter of the counterbore is bigger than that of the threaded hole; and an oxygen sensor is arranged in the counterbore. A gap is arranged between the oxygen sensor and the counterbore. The small-sized single cylinder gasoline engine is provided with the gap between the oxygen sensor and the oxygen sensor, on the one hand, the gap is convenient to install the oxygen sensor using a sleeve, and on the other hand, the gap is helpful to the radiation of the oxygen sensor for preventing the oxygen sensor failure caused by the heat accumulation on the oxygen sensor. The small-sized single cylinder gasoline engine can be allocated with an electronic injection control system in low cost under the premise of no influence on the appearance of the engine, and has positive social valve and economic value for promoting the electronic fuel injection of the small-sized single cylinder gasoline engines. The small-sized single cylinder gasoline engine can be used in small-sized machinery such as motorcycles, grass cutters and the like.
Description
Technical field
The utility model relates to a kind of motor, is specifically related to a kind of small-sized single cylinder petrol engine.
Background technique
Along with the reinforcement of people's environmental protection consciousness, to the emission control increasingly stringent of internal-combustion engine.National legislation has progressively begun the petrolic discharging proposition of small-sized single cylinder control requirement at present.This small-sized single cylinder petrol engine is widely used, and wherein motorcycle has occupied its major part with the small-sized single cylinder petrol engine.
Existing small-sized single cylinder petrol engine such as Fig. 1 are to shown in Figure 2, the general Carburetor that adopts realizes that oil gas mixes, its oil gas mixing match is difficult to accurate control, the discharging of combustion pollution thing can not be satisfied the emission control requirement, is the effective way that addresses this problem and adopt electric spray control system to its control of carrying out chemically correct fuel.Whether in electric injection system, lambda sensor is installed in the engine's exhaust system, be used for detection of engine and operate near the chemically correct fuel, thereby can revise fuel injection quantity, realizes the closed loop control to motor.As the core component of electric spray control system, how lambda sensor is installed in a difficult problem that becomes necessary solution on the small-sized single cylinder petrol engine.
Traditional oxygen sensor in use for car generally all is mounted on the outlet pipe, and this is owing to motor car engine generally is the multi-cylinder engine decision.Lambda sensor must detect total discharge amount of exhaust gas that a plurality of cylinders are discharged, for multi-cylinder engine, and the position that this converges with regard to the waste gas that requires lambda sensor to be installed in each cylinder is discharged.In general motor car engine converges waste gas by gas exhaust manifold, and therefore, lambda sensor is installed in becomes the general way of industry on the outlet pipe.
And the outlet pipe of motorcycle is generally the outward appearance part, if lambda sensor is installed on the outlet pipe, cost height not only, and if choice of location improper, very big to its appearance effects.
The model utility content
The technical problems to be solved in the utility model provides a kind of small-sized single cylinder petrol engine, and it adopts lambda sensor to carry out the control of air fuel ratio, and does not influence the motor outward appearance.
For solving the problems of the technologies described above, the petrolic technical solution of the utility model small-sized single cylinder is:
Comprise intake duct, air outlet flue, spark plug; Wherein: described air outlet flue one side is provided with counterbore, and counterbore is communicated with air outlet flue by the tapped hole of one end, and the internal diameter of counterbore is greater than the internal diameter of tapped hole; Be provided with lambda sensor in the counterbore.
Be provided with the gap between described lambda sensor and the counterbore.
Step surface between described counterbore and the tapped hole is provided with seal washer for the sealing surface of lambda sensor is installed between described lambda sensor and the described sealing surface.
The technique effect that the utility model can reach is:
The utility model is provided with the gap between lambda sensor and counterbore, this gap can conveniently use sleeve that lambda sensor is installed on the one hand, makes the mounting process of lambda sensor easy; Help the heat radiation of lambda sensor on the other hand, to prevent owing to heat is assembled the lambda sensor inefficacy that causes on lambda sensor.
The utility model can be equipped with electric spray control system at low cost under the prerequisite that does not influence the motor outward appearance, for advancing the petrolic EFIization of small-sized single cylinder to have positive social value and economic value.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further detail:
Fig. 1 is the petrolic structural representation of prior art single cylinder;
Fig. 2 is the sectional view of A-A among Fig. 1;
Fig. 3 is the petrolic structural representation of the utility model small-sized single cylinder;
Fig. 4 is the sectional view of A-A among Fig. 3;
Fig. 5 is the partial enlarged drawing of B among Fig. 4;
Fig. 6 is the another kind of embodiment's of the utility model a schematic representation;
Fig. 7 is the sectional view of A-A among Fig. 6.
Among the figure, 1 lambda sensor, 2 counterbore walls, 3 counterbores, 4 tapped holes, 5 seal washers, 6 sealing surfaces, 11 intake ducts, 12 air outlet flues, 13 spark plugs.
Embodiment
To shown in Figure 5, the utility model small-sized single cylinder petrol engine comprises intake duct 11, air outlet flue 12, spark plug 13 as Fig. 3; Air outlet flue 12 1 sides are provided with counterbore 3, and counterbore 3 is communicated with air outlet flue 12 by the tapped hole 4 of one end.
Be provided with lambda sensor 1 in the counterbore 3, tapped hole 4 matches with lambda sensor 1, lambda sensor 1 by with tapped hole 4 between be threaded and be fixed in the counterbore 3.
The internal diameter of counterbore 3 is provided with the gap greater than the internal diameter of tapped hole 4 between lambda sensor 1 and the counterbore 3; Step surface between counterbore 3 and the tapped hole 4 is provided with seal washer 5 for the sealing surface 6 of lambda sensor 1 is installed between lambda sensor 1 and the sealing surface 6.Lambda sensor 1 stretches in the air outlet flue 12.
The utility model is provided with the gap between lambda sensor 1 and counterbore 3, on the one hand, can use sleeve that lambda sensor 1 is installed in the tapped hole 4 when lambda sensor 1 is installed, and makes things convenient for the installation of lambda sensor 1; On the other hand, help the heat radiation of lambda sensor 1, can prevent that heat from assembling on lambda sensor 1.
The utility model can be equipped with electric spray control system at low cost under the prerequisite that does not influence the motor outward appearance, for advancing the petrolic EFIization of small-sized single cylinder to have positive social value and economic value.
The utility model can be used for small mechanical equipments such as motorcycle, mowing machine.
Claims (7)
1, a kind of small-sized single cylinder petrol engine comprises intake duct, air outlet flue, spark plug; It is characterized in that: described air outlet flue one side is provided with counterbore, and counterbore is communicated with air outlet flue by the tapped hole of one end; Be provided with lambda sensor in the counterbore.
2, small-sized single cylinder petrol engine according to claim 1, it is characterized in that: the internal diameter of described counterbore is greater than the internal diameter of tapped hole.
3, small-sized single cylinder petrol engine according to claim 1 and 2 is characterized in that: be provided with the gap between described lambda sensor and the counterbore.
4, small-sized single cylinder petrol engine according to claim 1 is characterized in that: the step surface between described counterbore and the tapped hole is provided with seal washer for the sealing surface of lambda sensor is installed between described lambda sensor and the described sealing surface.
5, small-sized single cylinder petrol engine according to claim 1 is characterized in that: described lambda sensor by with described tapped hole between be threaded and be fixed in the counterbore.
6, small-sized single cylinder petrol engine according to claim 1 is characterized in that: the cross section of described counterbore is for circular or special-shaped.
7, according to claim 1 or 6 described small-sized single cylinder petrol engines, it is characterized in that: the cross section of described counterbore is closed or has opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200605930U CN201209482Y (en) | 2008-06-17 | 2008-06-17 | Small-sized single-cylinder gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200605930U CN201209482Y (en) | 2008-06-17 | 2008-06-17 | Small-sized single-cylinder gasoline engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201209482Y true CN201209482Y (en) | 2009-03-18 |
Family
ID=40480215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200605930U Expired - Lifetime CN201209482Y (en) | 2008-06-17 | 2008-06-17 | Small-sized single-cylinder gasoline engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201209482Y (en) |
-
2008
- 2008-06-17 CN CNU2008200605930U patent/CN201209482Y/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090318 |