CN201074553Y - Low-discharging straight-spraying diesel engine cylinder cover - Google Patents
Low-discharging straight-spraying diesel engine cylinder cover Download PDFInfo
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- CN201074553Y CN201074553Y CNU2007200431544U CN200720043154U CN201074553Y CN 201074553 Y CN201074553 Y CN 201074553Y CN U2007200431544 U CNU2007200431544 U CN U2007200431544U CN 200720043154 U CN200720043154 U CN 200720043154U CN 201074553 Y CN201074553 Y CN 201074553Y
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Abstract
The utility model relates to a cylinder cover of a low discharge direct injection diesel engine. The mixing quality of air and fuel in a combustion chamber is improved through arranging a tangential screw intake with favorable performance and an installation hole of an optimization fuel injector and the positions of an intake valve and an exhaust valve, which can make fuel be fully combusted, thereby increasing the working performance of the diesel engine, improving the index of discharge property, and meeting the requests of national emission forced standards.
Description
Technical field
The utility model relates to low emission direct injection diesel engine cylinder head, particularly cylinder bore 95～105 millimeters low emission direct injection diesel engine cylinder head.
Background technique
We know that along with the reinforcement day by day of people's environmental consciousness, domestic emission problem to diesel engine is more and more paid attention to, and the restriction regulation has been made to the exhaust index of diesel engine by country.Diesel engine major part in the market all can not satisfy the restriction regulation of country to the exhaust index of internal-combustion engine.
Diesel engine with direct injection is that the firing chamber is directly processed on piston head, is processed with the hole that is used to install valve and oil sprayer on cylinder head.In diesel engine when work,, air forms eddy current by the spiral or the tangential inlet duct that are arranged on the cylinder head, thereby and enters by intake valve that cylinder mixes mutually with the oil bundle that is sprayed by oil sprayer and the burning driven plunger is done work.The power character of diesel engine, fuel economy and exhaust index have inseparable relation with the height of the mixing quality of above-mentioned air and fuel.And the mounting point of the intake valve on the cylinder head, exhaust valve, oil sprayer, oil sprayer setting angle and the strength of vortex of the air-flow that determined by the intake duct shape and flow size to the mixing quality of above-mentioned air and fuel, play significant effects and effect.
In existing direct injection diesel machine technology, the cylinder head of direct injection diesel engine, because of the position of the performance of its intake duct and mounting hole of oil sprayer and with the reasonable Arrangement of the correlation of inlet and outlet door position and coupling on the topic difficulty, make the emission performance index of diesel engine can not satisfy the regulation requirement of country.
Summary of the invention
The purpose of this utility model be to provide a kind of can the optimized combustion indoor air and the direct injection diesel engine cylinder head of the mixing quality of fuel, reduce the discharge value of diesel engine, make it reach the purpose that satisfies national emission performance index request.
The utility model is by the tangent screw intake duct of arranging function admirable on cylinder head and optimizes position mounting hole of oil sprayer and the inlet and outlet door, realizes above-mentioned purpose.
The low emission direct injection diesel engine cylinder head that the utility model is related, cylinder head is provided with intake valve mounting hole, exhaust valve mounting hole, mounting hole of oil sprayer and tangent screw intake duct, the center line of intake valve mounting hole is 4～7mm with respect to the throw of eccentric a of cylinder head center line, and b is 24～27mm; The intersection point of the center line of mounting hole of oil sprayer and cylinder head bottom plane is 0～3mm with respect to the throw of eccentric c of cylinder head center line, and d is 4～7mm; The center line of exhaust valve mounting hole is 4～7mm with respect to the throw of eccentric a of cylinder head center line, and g is 24～29mm; The angle f of the center line of mounting hole of oil sprayer and cylinder head bottom plane is 68 °～75 °; The center line of the suction port of tangent screw intake duct is 20～25mm with respect to the eccentric distance e of valve center line; The boss plane of tangent screw intake duct vortex chamber is 30～38mm to the distance h of cylinder head bottom plane.
Such scheme by to the particular design of mounting hole of oil sprayer position, intake valve mounting hole, exhaust valve position of mounting hole and " tangent screw intake duct " shape and the rational Match of position arrange, make the better off that mixes of air and fuel, therefore adopt the exhaust index of diesel engine of this model utility lower.
The various parameters combination that employing is stated in a in the scheme, b, c, d, e, f, g, the h parameter area are tested as different technological schemes.
Wherein with: (one) adopts each parameter to be respectively: a=5mm; B=25mm; C=1mm; D=6mm; E=22mm; F=75 °; G=27mm; The technological scheme of h=36mm and (two) adopt and are respectively with each parameter: a=5mm; B=25mm; C=1mm; D=6mm; E=22mm; F=73 °; G=27mm; The test result of the technological scheme of h=36mm all can satisfy the forced discharge standard of country.Its exhaust index is respectively: (one) CO:3.3g/Kwh; HC:0.91g/Kwh; NO
X: 7.2Kwh; PM:0.57; (2) C0:3.4g/Kwh; HC:0.9g/Kwh; NO
X: 7.4Kwh; PM:0.56.
Description of drawings
Fig. 1 is an inlet and outlet door position of mounting hole relational structure schematic representation of the present utility model;
Fig. 2 is the structural representation of mounting hole of oil sprayer of the present utility model;
Fig. 3 is a tangent screw intake duct structural representation of the present utility model;
Fig. 4 is another visual angle structural representation of tangent screw intake duct of the present utility model.
Among the figure: 1. intake valve mounting hole 2. exhaust valve mounting holes 3. mounting hole of oil sprayer 4. tangent screw intake ducts
Embodiment
The low emission direct injection diesel engine cylinder head that the utility model is related, cylinder head is provided with intake valve mounting hole, exhaust valve mounting hole, mounting hole of oil sprayer and tangent screw intake duct, and it can adopt following two kinds of preferred embodiments in cylinder covering position relation:
Embodiment one: the center line of intake valve mounting hole is 5mm with respect to the throw of eccentric a of cylinder head center line, and b is 25mm; The intersection point of the center line of mounting hole of oil sprayer and cylinder head bottom plane is 1mm with respect to the throw of eccentric c of cylinder head center line, and d is 6mm; The center line in the hole of installation exhaust valve is 5mm with respect to the throw of eccentric a of cylinder head center line, and g is 27mm; The angle f of the center line of mounting hole of oil sprayer and cylinder head bottom plane is 75 °; The center line of the suction port of tangent screw intake duct is 22mm with respect to the eccentric distance e of valve center line; H is 27mm; The boss plane of tangent screw intake duct vortex chamber is 36mm to the distance h of cylinder head bottom plane.
Embodiment two: the center line of intake valve mounting hole is 5mm with respect to the throw of eccentric a of cylinder head center line, and b is 25mm; The intersection point of the center line of mounting hole of oil sprayer and cylinder head bottom plane is 1mm with respect to the throw of eccentric c of cylinder head center line, and d is 6mm; The center line of exhaust valve mounting hole is 5mm with respect to the throw of eccentric a of cylinder head center line, and g is 27mm; The angle f of the center line of mounting hole of oil sprayer and cylinder head bottom plane is 73 °; The center line of the suction port of tangent screw intake duct is 22mm with respect to the eccentric distance e of valve center line; The boss plane of tangent screw intake duct vortex chamber is 36mm to the distance h of cylinder head bottom plane.
More than two kinds of embodiments can both satisfy the forced discharge standard-required of country.
Claims (3)
1. direct injection diesel engine cylinder head, cylinder head is provided with intake valve mounting hole, exhaust valve mounting hole, mounting hole of oil sprayer and tangent screw intake duct, it is characterized in that: the center line of intake valve mounting hole is 4～7mm with respect to the throw of eccentric a of cylinder head center line, and b is 24～27mm; The intersection point of the center line of mounting hole of oil sprayer and cylinder head bottom plane is 0～3mm with respect to the throw of eccentric c of cylinder head center line, and d is 4～7mm; The center line of exhaust valve mounting hole is 4～7mm with respect to the throw of eccentric a of cylinder head center line, and g is 24～29mm; The angle f of the center line of mounting hole of oil sprayer and cylinder head bottom plane is 68 °～75 °; The center line of the suction port of tangent screw intake duct is 20～25mm with respect to the eccentric distance e of valve center line; The boss plane of tangent screw intake duct vortex chamber is 31～38mm to the distance h of cylinder head bottom plane.
2. direct injection diesel engine cylinder head according to claim 1 is characterized in that: the center line of intake valve mounting hole is 5mm with respect to the throw of eccentric a of cylinder head center line, and b is 25mm; The intersection point of the center line of mounting hole of oil sprayer and cylinder head bottom plane is 1mm with respect to the throw of eccentric c of cylinder head center line, and d is 6mm; The center line of exhaust valve mounting hole is 5mm with respect to the throw of eccentric a of cylinder head center line, and g is 27mm; The angle f of the center line of mounting hole of oil sprayer and cylinder head bottom plane is 75 °; The center line of the suction port of tangent screw intake duct is 22mm with respect to the eccentric distance e of valve center line; The boss plane of tangent screw intake duct vortex chamber is 36mm to the distance h of cylinder head bottom plane.
3. direct injection diesel engine cylinder head according to claim 1 is characterized in that: the center line of intake valve mounting hole is 5mm with respect to the throw of eccentric a of cylinder head center line, and b is 25mm; The intersection point of the center line of mounting hole of oil sprayer and cylinder head bottom plane is 1mm with respect to the throw of eccentric c of cylinder head center line, and d is 6mm; The center line of exhaust valve mounting hole is 5mm with respect to the throw of eccentric a of cylinder head center line, and g is 27mm; The angle f of the center line of mounting hole of oil sprayer and cylinder head bottom plane is 73 °; The center line of the suction port of tangent screw intake duct is 22mm with respect to the eccentric distance e of valve center line; The boss plane of tangent screw intake duct vortex chamber is 36mm to the distance h of cylinder head bottom plane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200431544U CN201074553Y (en) | 2007-08-14 | 2007-08-14 | Low-discharging straight-spraying diesel engine cylinder cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200431544U CN201074553Y (en) | 2007-08-14 | 2007-08-14 | Low-discharging straight-spraying diesel engine cylinder cover |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201074553Y true CN201074553Y (en) | 2008-06-18 |
Family
ID=39519816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200431544U Expired - Fee Related CN201074553Y (en) | 2007-08-14 | 2007-08-14 | Low-discharging straight-spraying diesel engine cylinder cover |
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| Country | Link |
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| CN (1) | CN201074553Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018086190A1 (en) * | 2016-11-12 | 2018-05-17 | 顺德职业技术学院 | Internal combustion engine cylinder-based purification structure |
-
2007
- 2007-08-14 CN CNU2007200431544U patent/CN201074553Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018086190A1 (en) * | 2016-11-12 | 2018-05-17 | 顺德职业技术学院 | Internal combustion engine cylinder-based purification structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080618 Termination date: 20150814 |
|
| EXPY | Termination of patent right or utility model |