CN101576017B - Method for enhancing power of gasoline engine - Google Patents
Method for enhancing power of gasoline engine Download PDFInfo
- Publication number
- CN101576017B CN101576017B CN2009100528647A CN200910052864A CN101576017B CN 101576017 B CN101576017 B CN 101576017B CN 2009100528647 A CN2009100528647 A CN 2009100528647A CN 200910052864 A CN200910052864 A CN 200910052864A CN 101576017 B CN101576017 B CN 101576017B
- Authority
- CN
- China
- Prior art keywords
- valve seat
- power
- exhaust valve
- gasoline engine
- axis
- 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 - Fee Related
Links
Images
Landscapes
- Valve-Gear Or Valve Arrangements (AREA)
Abstract
The invention discloses a method for enhancing the power of a gasoline engine. The invention is characterized by enlarging the angle between the circular conical surface of inner wall of an intake valve seat and axis of the intake valve seat and increasing minimum inside diameter of the intake valve seat; enlarging the angle between the circular conical surface of inner wall of an exhaust valve seat and axis of the exhaust valve seat and also increasing minimum inside diameter of the exhaust valve seat; and enlarging outline of admission cam of a camshaft. The invention can achieve the purposeof enhancing the power of the gasoline engine by improving the combination and machining of the intake valve seat and the exhaust valve seat and enhancing the outline of the admission cam, just with improvement of a few of parts. The invention has the advantages of cost-saving and high efficiency, and is especially suitable for improving the power of gasoline engines with low power and low enginevolumetric efficiency caused by lower inlet channel flow coefficient which is the result of smaller diameter of the inlet channel throat-aperture.
Description
Technical field
The invention belongs to the technology of gasoline engine field, be specifically related to a kind of method for enhancing power of gasoline engine.
Background technique
Petrol engine is a kind of spark ignition formula explosive motor that uses gasoline for the fuel.In explosive motor, air inlet system and exhaust system, fuel supply system the cooperatively interacting of combustion-chamber shape three of unifying is the key of decision combustion process quality.Enter power character, Economy and the emission performance important influence of the flowing state of interior air quantity of cylinder and air inlet generation to internal-combustion engine.In order to promote engine power, just must improve the air quantity that enters in the cylinder, promote its charging efficiency.Improving the motor charging efficiency can realize by a lot of methods, such as improving gas handling system, utilizes the intake manifold resonance effect to improve charging efficiency, reduces the empty filter resistance of air inlet, utilizes the exhaust pulses effect to reduce exhaust back pressure, reduces silencing apparatus resistance etc.But under the definite situation of engine intake and exhaust system, just must improve by improving engine body.Wherein, provide can produce suitable swirl rate or roll stream than with the air flue of small circulation resistance or valve seat be the important approach that promotes engine power.Prior art mainly adopts improvement intake duct itself to improve air inflow by the mode that enlarges the intake duct internal diameter at present, thereby raising engine power, but improve intake duct itself, its corresponding back work amount is very big, air flue and water jacket all will improve, relate to core and repair a die etc., not only expense height but also cycle are long.
Therefore, be minimizing time and expense, guaranteeing under the constant situation of existing cylinder cap air flue and sand core of water jacket, how existing engine intake valve stand is improved, improve the engine inlets flow coefficient, improve motor charging efficiency and power, become the technical barrier that those skilled in the art press for solution.
Summary of the invention
Technical problem to be solved by this invention is by existing petrol engine being improved, providing a kind of power raising type petrol engine, to overcome the above-mentioned defective that prior art exists.
The technological scheme of technical solution problem of the present invention is as follows:
A kind of method for enhancing power of gasoline engine is characterized in that, increases the angle of suction valve cone circular conical surface of inner wall and suction valve cone axis, increases the suction valve cone minimum diameter; Increase the angle of exhaust valve seat circular conical surface of inner wall and exhaust valve seat axis, increase the exhaust valve seat minimum diameter; Increase the intake cam shape line of camshaft.
By above disclosed technological scheme as can be known, the present invention is by improving the machined shapes of inlet and outlet gate seat: minimum diameter is increased, and the increase of valve seat circular conical surface of inner wall and valve seat axis angle in addition, increases inlet valve cam shape line and cornerite.Because general experimental measurement upper airway flow flow coefficient flows than comprising that air flue and valve seat carry out together with rolling, therefore analyze as can be known according to air flue test and CFD, air-flow will enter in the cylinder more smoothly, and producing the bigger stream that rolls in cylinder compares, to help promoting the charging efficiency of motor like this, and the rate of burning of quickening mixed gas in cylinder, increase in-cylinder combustion pressure, thereby promote the moment of torsion and the power of motor, only need carry out less part and improve, promptly reach the purpose that promotes petrol engine power.Have the cost of saving, efficient advantages of higher.
The present invention is specially adapted to because of the intake duct throat diameter less than normal, and the inlet duct flow flow coefficient that causes is on the low side, and the low petrol engine power reforming of motor charging efficiency that causes and power.
Description of drawings
Fig. 1 is suction valve cone inner wall shape figure before and after the present invention's one specific embodiment improves.
Fig. 2 is that Fig. 1 embodiment improves front and rear row valve seat inner wall shape figure.
Fig. 3 is cam-shaped line and a valve lift relation curve before and after improving.
Fig. 4 is the rotating speed and the moment of torsion relation curve of petrol engine before and after improving.
Fig. 5 is the rotating speed and the power relation curve of petrol engine before and after improving.
Embodiment
Below for adopting method for enhancing power of the present invention to carry out the improved embodiment of petrol engine.
The NSE Engine Series is by Shanghai automotive engineering center independent research, power range is 60 kilowatts-120 kilowatts, for example model is that the engine power rating of NSE1.5L SVCT is 74.2kW, littler by 4.9% than desired value 78kW, Maximum Torque is 133.4N.m, littler by 1.2% than desired value 135N.m, the not enough 50kW of power per liter, on the low side at home and abroad with power in the displacement engine.
By adopting method for enhancing power of gasoline engine of the present invention, this motor is proposed improvement project: inlet and outlet gate seat combination machining shape is revised, and the intake cam molded lines is improved to 7.7mm*226deg by 7.3mm*220deg.
(1) suction valve cone combination machining shape.As shown in Figure 1, the A line is former suction valve cone combined machine machining shape among the figure, and the original shape angle is 5 °-＞30 °-＞45 °-＞75 °.The suction valve cone minimum diameter is 26.43mm, and valve line width L is 1.2mm.The B line is for improving back suction valve cone combination machining shape, angle changes 15 °-＞30 °-＞45 °-＞70 ° into, increased the angle of suction valve cone circular conical surface of inner wall and suction valve cone axis, it is 27.43mm that the valve seat minimum diameter increases, and it is 1.4mm that valve line width L ' increases.
(2) exhaust valve seat combination machining shape.As shown in Figure 2, the C line is former suction valve cone combined machine machining shape, and the original shape angle is 3 °-＞30 °-＞45 °-＞75 °.The valve seat minimum diameter is 22.83mm, and the valve line width is 1.6mm.The D line is for improving back suction valve cone combination machining shape, and angle is 15 °-＞30 °-＞45 °-＞70 °, and the increase of valve seat minimum diameter is 23.33mm, and valve line width L is constant still to be 1.6mm.
(3) inlet and outlet door critical size improves: it is 28.7mm that the intake valve diameter at butt end is increased by 27.7mm, and it is 24.6mm that the exhaust valve diameter at butt end is increased by 24.1mm.
(4) admission cam shaft improves: former intake cam molded lines is 7.3*220deg, and now increasing intake cam shape line is the 7.7mm*226deg molded lines.As shown in Figure 3, wherein the E line is original cam-shaped line and valve lift relation curve, and F is improved cam-shaped line and valve lift relation curve.
By adopting method for enhancing power of gasoline engine of the present invention right
The component that this scheme relates to change have inlet and outlet gate seat combined machine machining shape, inlet and outlet door and intake cam molded lines.
By above disclosed technological scheme as can be known, the present invention improves by the motor of NSE1.5L SVCT, and its effect is shown in Fig. 4,5, and former machine peak output is 73.9kW.Improving rear engine low speed has increased about 3%, and middling speed 2000r/min～4500r/min is constant substantially, and high speed rated power is 78.75kW, has promoted about 6%.More significantly promoted engine power performance.
The above is a better embodiment of the present invention only, is not to be used for limiting protection scope of the present invention, and the equal conversion that every claim of the present invention is done is all within protection scope of the present invention.
Claims (5)
1. method for enhancing power of gasoline engine, it is characterized in that, the suction valve cone circular conical surface of inner wall is divided into 4 sections from top to down, wherein increase the 1st section angle with the suction valve cone axis, 2nd, 3 sections angles with the suction valve cone axis are constant, reduce the 4th section angle with the suction valve cone axis, increase the suction valve cone minimum diameter; The exhaust valve seat circular conical surface of inner wall is divided into 4 sections from top to down, wherein increases the 1st section angle with the exhaust valve seat axis, and the 2nd, the 3 section angle with the exhaust valve seat axis is constant, reduces the 4th section angle with the exhaust valve seat axis, increases the exhaust valve seat minimum diameter; Increase the intake cam shape line of camshaft.
2. method for enhancing power of gasoline engine according to claim 1 is characterized in that, increases the valve line width of suction valve cone.
3. method for enhancing power of gasoline engine according to claim 1 is characterized in that, keeps the valve line width of exhaust valve seat constant.
4. method for enhancing power of gasoline engine according to claim 1 is characterized in that, increases the intake valve diameter at butt end.
5. method for enhancing power of gasoline engine according to claim 1 is characterized in that, increases the exhaust valve diameter at butt end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100528647A CN101576017B (en) | 2009-06-10 | 2009-06-10 | Method for enhancing power of gasoline engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100528647A CN101576017B (en) | 2009-06-10 | 2009-06-10 | Method for enhancing power of gasoline engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101576017A CN101576017A (en) | 2009-11-11 |
| CN101576017B true CN101576017B (en) | 2011-09-07 |
Family
ID=41271056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009100528647A Expired - Fee Related CN101576017B (en) | 2009-06-10 | 2009-06-10 | Method for enhancing power of gasoline engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101576017B (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201133264Y (en) * | 2007-12-14 | 2008-10-15 | 奇瑞汽车股份有限公司 | Diesel engine intake valve seat ring |
-
2009
- 2009-06-10 CN CN2009100528647A patent/CN101576017B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201133264Y (en) * | 2007-12-14 | 2008-10-15 | 奇瑞汽车股份有限公司 | Diesel engine intake valve seat ring |
Non-Patent Citations (3)
| Title |
|---|
| JP昭60-24802U 1985.02.20 |
| JP昭63-183308U 1988.11.25 |
| JP特开2009-57830A 2009.03.19 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101576017A (en) | 2009-11-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205013118U (en) | Direct injection spark ignition engine height rolls and flows air passage structure and engine | |
| CN205013163U (en) | Height rolls rascally says and engine | |
| CN1791741A (en) | Turbo charge diesel-type piston engine and method for controlling such an engine | |
| CN209212376U (en) | Supercharged direct injection engine intake duct | |
| CN105257372A (en) | Multi-oxygen engine and using method thereof | |
| CN201916044U (en) | Structure for improving air-inflowing rolling effect of petrol engine | |
| CN101260844A (en) | Petrol engine intake duct | |
| CN101576017B (en) | Method for enhancing power of gasoline engine | |
| CN201810411U (en) | Cylinder cover of diesel engine | |
| CN202108579U (en) | Combustion system of vortex type diesel engine | |
| CN204591503U (en) | Direct spray petrol engine in cylinder cylinder | |
| CN201193573Y (en) | Oil-saving and speed-raising turbine for vehicle | |
| CN202125344U (en) | Automobile fuel saving device | |
| CN100389250C (en) | Inlet guider of IC engine and IC engine therewith | |
| CN201218149Y (en) | Waste gas re-circulating system of 1.9L high pressure co-rail supercharging after-cooling diesel engine | |
| CN102787936A (en) | Low-swirl-rate spiral air inlet passage of diesel | |
| CN201982207U (en) | Inlet channel of direct injection gasoline engine in turbocharging cylinder | |
| CN201096026Y (en) | Diesel engine cylinder lid | |
| CN202370685U (en) | Engine air passage and combustion chamber structure | |
| CN204060985U (en) | A kind of internal-combustion engine atom boosting energy-saving device | |
| CN201794688U (en) | Diesel engine inlet duct | |
| CN201972818U (en) | Novel diesel engine helical gas inlet duct | |
| CN2605395Y (en) | Intake manifold structure for multi cylinder internal combustion engine | |
| CN211819681U (en) | Cylinder cover for plug-in hybrid electric vehicle double-spraying structure | |
| CN202370684U (en) | Air cylinder cover of diesel engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20110907 Termination date: 20200610 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |