RU95107435A - Carburetorless internal combustion engine - Google Patents

Abstract

FIELD: mechanical engineering; engines. SUBSTANCE: engine has at least one two-step cylinder 1 with internal circular step 2, piston 3 with head 4 coupled with connecting rod 5, head 6 of cylinder 1 with spark plug 7 and intake manifold 8 with intake valve 9 used for timing, throttle valve 10 common for all cylinders, exhaust manifold 11 with exhaust valve 12, fuel mixture supply line 13 common for all cylinders, common air supply line 14 with common choke valve 15. Device for pressure overheating of fuel made in the form of tubular heat exchanger is arranged in exhaust manifold 11 and is connected with system of pipelines. Multifunctional camshaft 18 is installed on one axle with fuel pump and connected with pump by splined joint and is loaded by spring. Multifunctional camshaft arranged in circular step 2 of cylinder 1 has slots-spools providing connection of fuel pressure overheating device with vacuum chamber 22 formed between walls of cylinder 1, piston 3 and circular step 2 with piston moving from bottom dead center owing to provision of intake port 23 and in circular step 2 and channels 24 with jets 25. Side cutouts 26 made in camshaft ensure periodical connection of vacuum chamber with air supply line 14 or with fuel mixture supply line 13 also through intake port 23 and channels 24 with jets 25. Head 4 of piston 3 forms together with head 6 of cylinder 11 combustion chamber which is periodically placed in communication with vacuum chamber 22 through fuel mixture supply line 13. EFFECT: enlarged operating capabilities. 1 cl, 6 dwg

Claims (1)

A carbureted internal combustion engine contains at least one two-stage cylinder with an internal annular protrusion, a piston with a head connected to a connecting rod, a cylinder head with a spark plug and an intake manifold with an intake valve used for gas distribution, a throttle valve common to all cylinders, an exhaust manifold with an exhaust valve, common for all cylinders fuel supply line, common air supply line with common air damper. A device for overheating fuel under pressure in the form of a tubular heat exchanger is located in the exhaust manifold and is connected to the fuel pipe system. The multifunctional camshaft is mounted on the same axis as the fuel pump, connected to it by a spline connection and preloaded by a spring. The multifunctional camshaft is located in the annular protrusion of the cylinder and is made with spools that provide the connection of the fuel overheating device under pressure with the rarefaction chamber formed when the piston moves from its BDC between the cylinder walls by the piston and the annular protrusion by means of the inlet window and channels made in the annular protrusion with jets. Side cuts made in the camshaft provide a periodic connection of the rarefaction chamber with the air line or the fuel mixture supply line also through the inlet window and channels with nozzles. The piston head forms a combustion chamber with the cylinder head, which, depending on the position of the camshaft, periodically communicates with the rarefaction chamber through the fuel mixture supply line.