Internal combustion engine with piston, of the rotary type.
AS AFRICAN AND MALAGASY EO INDUSTRIAL PROPERTY P. 887 Yaounde (Cameroon) the O. 00 the m ^ P.I.. PATENT * V. International Patent Classification: 02 № 01052 F. Requested 30 December 1964 to 20 min. to the O.A.M. 46 H-I-P. (G.P. no. 51,153) by companies called: NSUG.m.b.H.Motorenwerke Ag and WANKEL engine, residing in Germany. Issued 7 August 1968, published at The present invention relates to an internal piston internal combustion engine, a rotary-type, - conduct as as a shell whose peripheral surface oduc - ment which has several arcs delimits, with lateral flanges, an inner space traversed, to per - pendiculairement to said flange, a shaft of eccentric - cudgel. On the eccentric shaft journaled a piston multi cutting, sliding constantly, by these last, against the inner peripheral surface of the envelope, forming working chambers volume a variable. For carrying out the process of renews - telling of the charge, it is provided in the sheath and/or in the side plates and intake slots exhaust gas, whose control ports are controlled by the piston which passes over them. Such internal combustion engines have, inter alia, this advantage that they can be provided with receiving holes admission control relatively straight section large resulting in an excellent degree of filling and high in efficiency - accounted bafflement. However in such engines, it is very difficult to avoid intercommunication periodic between intake and exhaust, particularly if port intake control control exhaust are both disposed within the on - inner peripheral face of the envelope. This intercom periodic results, in advantage - evicriminal, that, during part load operation and at low rotational speeds, waste gas can enter the inlet lumen, such that relatively few fresh gas can reach the suction chamber. The result is a walking irré - gulière the motor when in operation to load partial. The invention aims to remedy this state of things defective and, to this end, it provides for a intake port for operation to special partial load, this lumen which terminates in an special inlet port controlled by the piston and arranged in the casing and/or in the flanges laté - donors, at a location which is only released by the piston that when the orifice exhaust control is for the most part closed by it. In this manner, avoiding a decrease in the degree of filled - midwife, at part load, by exhaust gas. In practical, the invention may be practiced in a simple manner by means of a carburetor to register which only opens the main inlet port of the load reaches, for example 30 The invention will be better understood upon reading of the following detailed description and examining the drawing seal, which represents, by way of non-limiting example, one embodiment. Figure single of this drawing is shown, profile, an internal combustion engine turning piston, trochoid type section comprises an envelope 1 whose inner peripheral surface 2 has several arcs, preferably in the manner of an epitrochoid. The inner peripheral surface 2 delimits, in cooperation with lateral flanges, an inner space traversed, perpendicularly to said side flanges, by an eccentric shaft 3, 4 journaled on the eccentric which triangular a piston 5. The piston 5 is provided, along its edges, of vanes radially movable sealing 6 constantly which slide against the inner peripheral surface of the shell 2 to form three working chambers with variable volume, b., C.. The direction of rotation of the piston 5 is indicated by the arrow as the ratio of the rotational speed of the piston 5 and that of the eccentric shaft 3 is 1:3. In the envelope 1 of the housing are provided an intake port 7 for the main 993,769. Rotary-piston engines. N.S.U. MOTORENWERKE A.G., and MANKEL G.m.b.H. July 23, 1963 [July 27, 1962], No. 29086/63. Heading F1F. A rotary-piston I.C. engine of the trochoidal n and n+1 lobe type comprises a main intake port 10, an exhaust port 11 in a peripheral wall 1 and/or side walls of the engine housing and a secondary intake port 14 in said peripheral wall or at least one of said side walls, port 14 being uncovered by the piston 5 when port 11 is isolated, or substantially isolated, from port 10 by one of the radial seals 6 in the piston. When the engine is lightly loaded port 10 may be closed by a throttle-valve in an associated carburetter, or a separate valve 18, to prevent exhaust gases escaping therethrough, an adjacent working chamber A being charged through port 14 only. Ports 10, 14 may be connected to a carburetter 16 having two choke tubes and a throttle-valve 19 which is operated in unison with valve 18. an exhaust port 8 for the exhaust gas and a spark plug 9. Thus in each working chamber, each complete rotation of the piston 5, unwinds a four stroke cycle. The main intake port 7 emerges through a control port 10 in the inner peripheral surface 2 and the control port of the exhaust port 8 is denoted by the reference 11. The two control ports are controlled by the edges of the piston 5. In the position shown, the piston is at a dead point intercom, it is to say that the main intake port 7 and the exhaust port 8 communicate with each other through the working chamber A. accordingly, waste gas may enter the lumen main intake 7 and this, in particular, when operating at part load and low speeds of rotation of the fact that, in this case, a relatively large negative pressure prevails in the main intake port 7. This endangers the mixture forming part load flammable. To eliminate this disadvantage, there is provided, according to the invention, an intake port 12 for the special part load operation, light which terminates in a control port 14 which, in the example shown, is disposed in a side flange. The control port 14 is arranged in such a manner that it is not released by the piston 5 only when the latter has passed, at least for the most part, the control port exhaust 11. This prevents pollution of the mixture, confectioneries partial load, by waste gas and obtained a regular diet during part load operation. The energization of the light 7 main intake and the light inlet part load 12 had air-fuel mixture is preferably effected by means of a carburetor to register 16. This carburetor is for example adjusted such that, up to a loading of about 30%, it only provides power to the light inlet part load 12 with fresh gas, and begins to also supply fresh gas light main intake 7 that when the load reaches or exceeds 30%. In the main intake port 7 is provided, near the inner peripheral surface 2 of the shell 1, a shutter device closed during part load operation, device which is, for example, in the form of a throttle valve and which is operated simultaneously with the throttle valve full-charge 19 in the carburetor to register 16. ABSTRACT The invention essentially relates to a piston internal combustion engine, a rotary-type, comprising a casing having an inner peripheral surface having a plurality of arcs delimits, in cooperation with lateral flanges, an inner space traversed perpendicularly to said lateral flanges by an eccentric shaft, the eccentric journaled on a piston to which several edges, whose edges slide continuously along the inner peripheral surface of the casing, lights intake and exhaust gas being provided in the cover and/or in the side plates, the lights whose control ports are controlled by the piston which passes over them, remarkable by the following features considered separately or in combination: c.. The control port main inlet is arranged, in a manner known per se, in the envelope, near an area opposite the pivot axis and a cap body, formed during part load operation is arranged in the main intake port, near the inner peripheral surface of the envelope. Companies said: NSUMOTORENWERKE A GRAMS. &WANKEL ENGINE GRAMS. m B. HR. Proxy: JohnMatipInternal combustion engine piston, rotary type.
