CN101201010B - Two-stroke combustion engine capable of evacuating exhaust gas - Google Patents

Abstract

The invention provides a mechanical design method of a two-stroke internal combustion engine to completely exhaust waste gas, with solves the difficult problems in the prior two-stroke and four-stroke engines that the waste air is not completely exhausted and once work requires two cycles. Each of the two ends of the cylinder sleeve is provided with a piston, wherein one is used to compress the air to do work, while the other is used to exhaust the waste air. The invention changes a four-stroke engine into a two-stroke engine, so the volume and the weight are reduced by half, the production cost is saved, and more importantly, the self load is reduced.

Description

Two stroke IC engine that can evacuating exhaust gas

This patent with the method for Machine Design fundamentally solve two, quartastroke engine, one be that exhaust is unclear, another is to do merit one time more, but is used in the intake and exhaust, also has the dicyclo internal-combustion engine, cooling system is a problem very much.

This human two cover connecting rods, piston are contained in the same cylinder, make four-stroke machine drop to the two-stroke machine, and not only power and do not descend, and volume and weight all reduces to half, save manufactory's cost, more are the loads of saving self.

This patent embodiment is that two cover connecting rods and pistons are contained in the same cylinder, and a cover piston is used for pressurized gas and combustion gas workmanship usefulness, and the another set of inlet and outlet usefulness that is used for is so another set of piston and connecting rod weight are all very light.

Fig. 1 is detailed rules for the implementation figure: 1. connecting rod one; 2. cylinder sleeve; 3. intake valve; 4. exhaust valve; 5. piston one; 6. piston two; 7. connecting rod two; 8. cylinder sleeve baffle plate; 9. oil nozzle or spark plug; 10. fixing rod; 11. propelling tool; 12. fork; 13. fork hook; 14. fork rotatingshaft

Fig. 2 is the firing chamber acting, is transferred to bent axle acting demonstration figure.

First cover connecting rod, the Piston Compression gas is during to top dead center, shown in Figure 1, oil nozzle or spark plug 9, the commencement of fuel injection or the flower of setting fire make gaseous combustion, promote the first cover piston 5 and connecting rod 1 acting then, after it arrived exhaust valve, waste gas begins to discharge (all to be made up of one-way valve into and out of valve, I do not draw, and yet and do not introduce).At this moment, another set of piston 6 and connecting rod 7, rotate promotion by fork 12 and fork hook 13 by fork rotatingshaft 14 rotatory forces, (the fork rotatingshaft 14 and first cover connecting rod bent axle (the not drawing) rotational synchronization), making connecting rod 7 can promote piston 6 discharges waste gas, when it turns to the breach that advances tool 11, the fork hook passes and advances the tool breach, and exhaust is finished, advances tool 11 to begin to return by the fork hook, at this moment be period of intake, when piston 6 reached top dead center soon, the fork hook came off inadequately because of advancing tool length, and air inlet this moment is also finished, the length of fork is several times of crankshaft length, and this will decide according to design.

In order to allow small diesel engine, can manual cranking, must open an aperture on oil nozzle 9 opposites one valve is installed, open valve and can shake, to let go, the spring handle valve-closing begins to start, my just indication of valve of not drawing.

In order to prove no matter under which kind of situation, as long as intake and exhaust are abundant, burning fully, piston promotes bent axle can transmit acting fully, is proved by Fig. 2, when referring to divide out result under the situation about disregarding of frictional force.It is x that CB section piston is promoted the position by combustion gas, and BA is that length of connecting rod I, OA are crank throw R.If BO=h, then h=I+R-x.

If ∠ is OBA=q, ∠ BOA=β

If piston is F to connecting rod power, then the power of connecting rod acquisition is $\mathrm{Fx}=\frac{F}{\cos q}$ The work done of combustion gas promotion this moment piston is dw ₁=Fdx, and the merit done of bent axle is ${\mathrm{dw}}_2=\mathrm{Fx}\·\cos \∠\mathrm{BAO}\·R\·\mathrm{d\β}$ $=\frac{F}{\cos q}\sin \∠\mathrm{bao}\·r\·\mathrm{d\β}=\frac{F}{\cos q}(\sin q\·\cos \mathrm{\β}+\cos q\·\sin \mathrm{\β})\·R\·\mathrm{d\β}.$

Revolve law and the dextrorotation law gets by surplus $\cos q=\frac{h^2+I^2-R^2}{2\mathrm{Ih}},$ $\cos \mathrm{\β}=\frac{h^2+R^2-I^2}{2\mathrm{Ih}},$ SinqI=sin β R also establishes R ²-I ²=A gets

${\mathrm{dw}}_2=-\frac{{\mathrm{FR}\·2h}^2}{h^2-A}d\cos \mathrm{\β}=-\frac{{\mathrm{Fh}}^2}{h^2-A}d(h+\frac{A}{h})=-\mathrm{Fdh}$

$=-\mathrm{Fd}(I+R-x)=\mathrm{Fdx}$

So dw ₁=dw ₂

Proved that firing chamber institute work all is delivered on the bent axle no matter crank throw is much this moment.

Claims (1)

1. One kind can evacuating exhaust gas two stroke IC engine comprise:

   First connecting rod, second connecting rod, first piston, second piston, cylinder sleeve, intake valve, exhaust valve, cylinder sleeve baffle plate and propelling tool, a cylinder sleeve baffle plate is fixed on one top of cylinder sleeve, the cylinder sleeve baffle plate in the form of a ring, the cylinder sleeve the other end is provided with intake valve near the afterbody place, exhaust valve, close cylinder sleeve baffle plate is in and has an aperture on the cylinder sleeve, the aperture place is provided with oil nozzle or spark plug, the first piston and second piston are in same cylinder sleeve, first connecting rod is at the tail end of cylinder sleeve, one connects bent axle, and the other end is connected the first piston in the cylinder sleeve, and second connecting rod is on the top of cylinder sleeve, one connects the propelling tool, and the other end is connected second piston in the cylinder sleeve.

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