JPS62135614A - Four-cycle reciprocating piston internal combustion engine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a four-stroke reciprocating piston in which a working piston precompresses the charge in the crankcase and controls the passage connection between the crankcase and the combustion chamber. Regarding internal combustion engines.

[Conventional technology]

Such a four-stroke reciprocating piston internal combustion engine is already known (US Pat. No. 3,973,532). In this case, during the piston movement to the piston top dead center, air or fuel-air mixture is sucked into the crankcase through the aiming valve, etc., and is precompressed during the return movement of the piston, so that it can be used for another aiming attack. It is discharged to the inlet valve of the internal combustion engine via a valve or the like and a reading passage. This configuration has the aim of obtaining a higher filling degree in internal combustion engines without pre-tH compression. Now, in the known theory, no measures are taken to achieve negative or quadratic mass balance.

Furthermore, precompression and feed rates are low, since only the working piston acts as a pumping element and the crankcase has too large a device volume.

It is also already known that the rigid piston rod of the working piston is provided with an auxiliary piston, in which the connecting rod of the crank transmission engages (U.S. Pat. No. 4,185,599).
7 specification). The space between the two coaxial pistons is divided by a hollow partition, on which the light valves of the two subspaces are provided, the cavity of the partition being connected via a suitable passage to the inlet valve of the combustion chamber. There is. The crankcase is therefore not used for precompression here, and the pressure t is applied to each side of the bulkhead.
g total spaces are created, in which the working piston and the auxiliary piston act alternately. Although the degree of filling of the combustion chamber is improved here, the rigid connection of both pistons to a common connecting rod results in a particularly disadvantageous construction with respect to the oscillating mass t. Furthermore, the dimension of the piston or cylinder in the direction of the ground line increases significantly, and the amount of ER of the machine also increases accordingly.

[Problem that the invention seeks to solve]

The object of the present invention is therefore to eliminate these drawbacks and to create an initial structure in which the -order and quadratic inertia forces are balanced, an improved degree of filling is obtained and a compact construction is obtained. This is the type of four-summation mentioned above.

[Means for solving problems]

In order to solve this problem, according to the invention, an auxiliary piston is provided which likewise serves the precompression, which auxiliary piston can be driven by the crankshaft in the opposite direction to the working piston and which is capable of absorbing the vibrating masses belonging to both pistons. The product of each crank radius is equal.

〔Effect of the invention〕

In this way, not only the working piston but also the auxiliary piston is used for precompression in the crankcase, and the provision of both pistons also reduces the amount of trapped space in the crankcase, so that the degree of filling is naturally increased. Since the product of the oscillating mass and the respective crank radius is equal for both pistons and both pistons perform movements in opposite directions, the desired mass balance of - is achieved.

In order to also balance the secondary inertial forces, an alternative arrangement of the invention provides for the connecting rod length and crank radius to be in the same ratio on both pistons.

The cylinder of the auxiliary piston has on its side remote from the crankcase a compression space with an inlet valve and an outlet valve, and from the outlet valve of this compression space a passage leads to the inlet valve of the working cylinder, so that the auxiliary piston By acting in both directions, the precompression with known advantages is further increased.

Finally, according to the invention, the passage connection between the crankcase and the compression space and combustion chamber of the auxiliary piston is at least five times the stroke volume of the working piston. This large volume of the channel connection avoids pressure fluctuations that would reduce the filling, thereby increasing the degree of filling as well.

[Actual coffee example]

In the drawing, an embodiment of the invention is shown. The four thermometer according to the invention has a working piston l sliding in a working cylinder 1a, which precompresses the charge in the crankcase 2. used to do. The crankcase 2 is connected to a combustion chamber 3 of the internal combustion engine via a passage 4, which leads to an inlet valve (not shown). The crankcase 2 has a light valve device 5 consisting of an inlet valve and an outlet valve)
Ru. Next to the crank arm 6 of the crankshaft 6a for the operating piston l, there is an eccentric 7 which is arranged diametrically opposite to the crank and has a connecting rod 8 for an auxiliary piston 9, so that the auxiliary piston 9 is connected to the crank ring 6a. is driven in the opposite direction to the working piston l and likewise serves to pre-compress the charge in the crankcase 2. 1.5 is equal, and the articulating paralysis length and crank radius are in the same ratio.

The cylinder 10 of the auxiliary piston 9 has a light valve system consisting of an inlet valve and an outlet valve on the side far from the crankcase 2.
It has a compression space 12 with a 1.1 mm diameter, from the outlet valve of which a passage 13 leads to the working cylinder 1a or to the combustion chamber 3. The passages 13 and 4 have a volume that is at least five times the stroke volume of the working piston l.

[Brief explanation of drawings]

FIG. 1 is a sectional view taken along the axis of a four-cycle reciprocating piston internal combustion engine, and FIG. 2 is a sectional view taken along line II--II in FIG. 1. 1... Operating piston, 2... Crank case, 3.
... Combustion chamber, 6a... Crankshaft, 9... Auxiliary piston, 4.13... Passage. Engraving of drawings (no changes to the contents) Procedural amendment (Soviet exam) February 1939! Commissioner of the Japan Patent Office on the 2nd; a + u 4'zu 1 Lord 1, Indication of the case 1932, Wait 1, Application No. 26207 n No. 2, Name of Zuromei, 1 cycle c1° phrase Piston internal combustion engine 3, Make amendments Relationship with the person's case Wait, /loutzr+Person's name Be Steil -/- (Müllerup-Fachchengesellschaft 4, agent

Claims (1)

[Claims] 1. In those in which the charge in the crankcase is precompressed by the operating piston and the passage connection between the crankcase and the combustion chamber is controlled, an auxiliary piston (9) is provided which also serves for the precompression. and that this auxiliary piston can be driven by the crankshaft (6a) in the opposite direction to the working piston (1), and that the products of the vibrating masses belonging to both pistons (1, 9) and their respective crank radii are equal. Features a 4-stroke reciprocating piston internal combustion engine. 2. Reciprocating piston internal combustion engine according to claim 1, characterized in that the connecting rod length and crank radius are in the same ratio in both pistons (1, 9). 3 The cylinder (10) of the auxiliary piston (9) has an inlet valve and an outlet valve (1) on the side far from the crankcase (2).
Claim 1 characterized in that it has a compression space (12) with a compression space (12), from the outlet valve of which a passage (13) leads to the inlet valve of the working cylinder (1a).
Reciprocating piston internal combustion engine as described in .