SU994788A1 - I.c. engine - Google Patents

Description

(54) INTERNAL COMBUSTION ENGINE

one

This invention relates to internal combustion engines, in particular, pre-combustion engines with external mixture formation.

A known internal combustion engine comprising at least one cylinder, a main combustion chamber equipped with inlet and exhaust valves, a pre-chamber with a spark plug and an additional inlet valve, and mixing systems with mixing chambers. frames, throttles and channels for feeding the lean mixture into the main chamber to the rich mixture through the valve space of the additional inlet valve into the prechamber. reported between; using a connecting channel 1. The disadvantage of this device is the presence of dead-end channels rich in mixture, contributing to the formation of a fuel film and air traffic jams in the channel, which leads to heterogeneity of the fuel-air mixture, poor-quality mixture formation, admission, ignition and, accordingly, decrease in efficiency and incomplete combustion.

The purpose of the invention is to increase the economy and reduce toxicity through quality mixing.

To achieve the goal c. an internal combustion engine containing at least one cylinder, a main combustion chamber equipped with inlet and exhaust valves, a pre-chamber with a spark plug and an additional inlet valve and mixing systems with mixing chambers, throttles and channels for feeding the lean mixture to the main chamber and the rich mixture through the over-valve space of the additional inlet clalan into the prechamber communicated with each other by means of a connecting channel 15, the connecting channel is made between. over valve space for additional inlet valve and lean feed channel.

The output of the connecting channel is made

20 in a lean chamber mixing chamber and provided with a choke.

The choke is controllable and kinematically coupled to the throttle valve of the mixing system, the lean is adjacent.

The connecting channels are made separate for each cylinder and communicate with the channels of the poor mixture in the area of the inlet valves.

The drawing shows the internal combustion engine, the cut.

The engine has a main combustion chamber 1 and an auxiliary combustion chamber — the prechamber 2. The inlet chamber 3 and the outlet chamber (not shown in the drawing) are located in the main chamber 1. In the prechamber 2 there is an additional inlet valve 4 having an over-valve space 5, and a spark plug 6. In the lower part of the valve body 4, holes -7 are made in the zone of the over-valve space 5 for supplying a rich fuel mixture to the channel 8 from the mixing system, such as a carburetor 9, installed above the mixing chamber 10 a lean mixture and a rich mixture mixing chamber 11, which is prepared by an auxiliary mixture-forming system 12 (also a carburetor made in the form of a carburetor section 9). The connecting channel 13 is made between the above-valve space 5 and the lean mixing chamber 10, for this, the outward surface of the valve body 14 can be made a groove in the form of a wide groove 15, and a hole 16 is installed in the wall of the mixing chamber 10. A damper is installed in the connecting channel 13 variable throttle 17 connected to the throttle 18 of the mixture-forming carburetor 9. Mixing chambers 10 and 11 have a common wall with a cavity 19 along which exhaust gases are vented.

The engine works as follows.

In the intake stroke, the lean mixture is supplied to the combustion chamber 1, and rich in the auxiliary chamber 2 and partially into the mixing chamber 10, where it is diluted. During the compression stroke in the prechamber 2, a mixture of the composition L 0.4-0.9 is formed (depending on the engine mode), ignition of which with the help of a spark provides a quick ignition of the charge in chamber 1. At the discharge stroke, before the TDC, the inlet valve 4 of the prechamber 2 opens provide the longest time-slice. The exhaust gases, which then enter the groove 15, through the openings 7 are picked up by the rich mixture flow and carried away through the channel 13 to the mixing chamber 10. The steady rich mixture flow in the channel 8 contributes to the stabilization of its qualitative and quantitative composition during the blowing of the prechamber 2 at the intake stroke and thereby the formation of an optimal composition in it at the time of ignition of charge and with high reproducibility in successive cycles. The differential pressure that ensures this flow in the pre-chamber engines always exists due to the fact that the vacuum created in the cylinder by suction movement during the suction is partially triggered by the pre-chamber nozzles.

The efficiency of the proposed engine is to save fuel by eliminating losses when skipping outbursts by increasing the reliability of ignition of lean mixtures, as well as by reducing the toxicity of exhaust gases.

Claims (4)

1. An internal combustion engine containing at least one cylinder, a main combustion chamber equipped with inlet and exhaust valves, a fork, a measure with a spark plug and an additional inlet valve and mixing systems with mixing chambers, throttles and supply channels for poor c. knead into the main chamber and rich mixture through the valve space above the additional inlet valve into 0 prechamber communicated with each other by means of a connecting channel, characterized in that, with the aim of increasing efficiency and reducing toxicity, the connecting channel is made between the additional valve space inlet valve and bore to supply poor mix. 2. The engine according to claim. I, characterized in that the output of the connecting channel is made in the mixing chamber of lean mixture Q and is equipped with a choke. 3. The motor according to Claim 2, characterized in that the choke is made controllable and kinematically connected with the throttle valve of the lean-mix-blending system. 4. The motor according to claim 1, characterized in that the connecting channels are made separate for each cylinder and communicated with the lean channels in the area of the intake valves. Sources of information taken into account during the examination 1. Japanese Application No. 53-38366, cl. F 02 M 27/00, published. 1978