CN1191267A - Method for regulating real air intake quantity in cylinder for two-stroke engine - Google Patents
Method for regulating real air intake quantity in cylinder for two-stroke engine Download PDFInfo
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- CN1191267A CN1191267A CN98110658A CN98110658A CN1191267A CN 1191267 A CN1191267 A CN 1191267A CN 98110658 A CN98110658 A CN 98110658A CN 98110658 A CN98110658 A CN 98110658A CN 1191267 A CN1191267 A CN 1191267A
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- cylinder
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Abstract
A method for regulating actual air input in cylinder of two-stroke engine technically features that fixed quantity (sufficient) pure air is first input to cylinder, that is, supplying air input needed by maximum power, and then part of air input is released to control actual air input in cylinder. Its advantages are increasing power, reducing fuel consumption and less environmental pollution. The method is suitable for the two-stroke engine using electronic sprayer to provide fuel.
Description
The present invention is a kind of method that is applied to the two stroke engine flow control.
At present, the regulating method of actual air inflow is to adopt the method for regulating charge flow rate in the various two stroke engine cylinders of application, and the aperture that promptly adopts closure or air throttle to regulate the air inlet trunnion is regulated and entered the interior mixed gas of cylinder or the quantity of pure air.Adopt the shortcoming of this method to be: because toxic emission is not clean, adds waste gas and return and scurry, cause oil consumption height, idling pollution level height, and power per liter to be difficult for improving, become the common fault of two stroke engine.
The present invention has eliminated the shortcoming that adopts control charge flow rate type two stroke engine, adopts two stroke engine of the present invention, can obviously reduce oil consumption, idling pollution reduction significantly, and power per liter improves.
Method of the present invention is: make earlier more than or the pure air by compression that equals the required air inflow of this two stroke engine peak output enter in the cylinder, adopt again and regulate the outer method of the controlled discharge cylinder of the pure air of part and come actual air inflow in the indirect control cylinder.For the ease of understanding, describe with a kind of special status of common four stroke engine below: in the intake process of four stroke engine, IO Intake Valve Opens.IC Intake Valve Closes when piston drops to lower dead center.(for the ease of understanding, our province but valve overlap and delay angle part).What enter in the cylinder like this, is the air quantity of being controlled by closure.In general, the actual air inflow of this circuit that Here it is.Close if postponed one section angle but intake valve blocks, the actual air inflow in the cylinder equals to deduct the air quantity of being discharged because of late release by intake valve by the air quantity that closure enters so.If intake valve is different at the delay-angle of compression stroke, actual air inflow also changes thereupon in the cylinder so.The simplest method of the present invention is that control is located at the valve on this two stroke engine cylinder head, make them need opening and closing in certain crank angle range in the scope of setting with rotating speed, perhaps only the angle is closed in control, be used for air discharge capacity in the control cylinder, reach the purpose of actual air inflow in the control cylinder.The valve here can adopt intake valve also can adopt exhaust valve.The employing intake valve, unnecessary air is back discharged from suction port.Adopt the unnecessary air of exhaust valve to discharge from relief opening.From analysis, employing control exhaust valve mode, the discharge of waste gas is more thorough.As mentioned above, on the two stroke engine of this pattern, use the cam of a contoured, add electronic oil injection device in the cylinder, just can normally air inlet, mixing in a speed range, but can not speed governing.Camshaft is one to one with the rotating speed of bent axle in addition, and synchronously.The oil spout of electronic oil injection device must be sprayed before a certain angle before valve-closing, can not discharge outside the cylinder to guarantee fuel oil.Air inlet system has cancelled gas-saving device and oil supplying device, and the pressurized air that enters cylinder can come own crankcase, also can be from other compression set.Driving valve gear, also can be calutron.
Be to realize one embodiment of the present of invention below.
Present embodiment has adopted the method for control exhaust valve, and its method is: the cam profile that satisfies between idling and the full speed range axially is produced on the axle in order this axle and bent axle run-in synchronism.Adopt smooth transition between cam profile and the profile, use the servomotor that connects with computer to drive rocking arm again and on this camshaft, move axially, thereby control the opening angle of exhaust valve and close the angle by mechanical device.Why adopting servomotor, is because mobile rocking arm needs certain power, and uses a computer and control, and the interior actual air inflow of cylinder just is under control like this.Cooperate the electronic oil injection device to spray an amount of fuel oil, just finished mixed gas quantity, concentration requirement.
The present invention compares following advantage with the air inlet method in past: since unnecessary pure air to enter cylinder again thereupon controlled Outside the discharge cylinder, thus in cylinder, also the waste gas of not discharging to be watered down by this strand waste gas, and scan out outside the cylinder. In addition because controlled row Be malleation when dropping a hint, waste gas can not be altered back in the cylinder again, has reached the purpose that purifies air in the cylinder. Adopt two of the method Two-stroke engine, its oil consumption obviously reduces, and power per liter rises, and the blowdown problem of two stroke engine will be resolved.
Claims (5)
1. a kind of method of controlling actual air inflow in the two stroke engine cylinder, it is characterized in that: make earlier more than or the air by compression that equals this two stroke engine peak output required air quantity enter in the cylinder, adopt the method for the controlled discharge of the pure air of control section to come actual air inflow in the control cylinder then.
2. a kind of as the 1. described controlling method of claim: regulate the exhaust valve be located on the two stroke engine cylinder head that adopts the method with respect to the angle of closing in the crank angle certain limit, opening angle is fixed.
3. a kind of as claim 1., 2. described controlling method: control the opening angle of exhaust valve simultaneously and close the angle.
4. a kind of as the 1. described controlling method of claim: regulate the intake valve be located on the two stroke engine cylinder head that adopts the method with respect to the angle of closing in the crank angle certain limit, opening angle is fixed.
5. a kind of as claim 1., 4. described controlling method: control the opening angle of intake valve simultaneously and close the angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98110658A CN1191267A (en) | 1998-02-17 | 1998-02-17 | Method for regulating real air intake quantity in cylinder for two-stroke engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98110658A CN1191267A (en) | 1998-02-17 | 1998-02-17 | Method for regulating real air intake quantity in cylinder for two-stroke engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1191267A true CN1191267A (en) | 1998-08-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98110658A Pending CN1191267A (en) | 1998-02-17 | 1998-02-17 | Method for regulating real air intake quantity in cylinder for two-stroke engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1191267A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101086221B (en) * | 2000-11-22 | 2013-07-17 | Avl里斯脱有限公司 | Method for supplying an internal combustion engine with conditioned combustion gas, device for carrying out said method |
-
1998
- 1998-02-17 CN CN98110658A patent/CN1191267A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101086221B (en) * | 2000-11-22 | 2013-07-17 | Avl里斯脱有限公司 | Method for supplying an internal combustion engine with conditioned combustion gas, device for carrying out said method |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |