摘要:
The invention discloses a two-stroke internal combustion engine having an engine housing with a crankcase in which a crankshaft is connected to a piston moving in a cylinder, an exhaust port leading from the cylinder space and opening at the level of the lower dead center of the crankshaft, the exhaust port is configured to be closed by a piston when the crankshaft is in its top dead center position, characterized in that it further has a rotary disk with an opening or recess on a part of its circumference, or with a protrusion on a part of its circumference, the rotary disk extending with its circumference into the exhaust port so that the exhaust port is completely closable by the rotary disk.
摘要:
A rotary cylinder machine, designed as a two-cycle internal combustion engine or as a compressor, includes in a housing (1) a cylinder rotor (5) that rotates about a first axis of rotation (7) and has three pairs of cylinders (13), the cylinders of each pair being coaxial and on opposite sides of the first axis of rotation and the pairs being spaced apart circumferentially by 120.degree.. The radially outer ends of the cylinders are closed by cylinder covers (33). Three pairs of pistons (15), rigidly connected together by piston rods (17), are carried on a crankshaft (21) that is rotatable about a second axis of rotation (23) that is parallel to and eccentric to the first axis of rotation (7). The piston rods (17) are seated on three eccentric disks (25), likewise displaced 120.degree. with respect to one another, on the crankshaft (21). Gas exchange takes place through piston-controlled ports (51, 53) of the cylinders (13). In the gas-exchange path of the ports (51, 53) rotary slide valve control arrangements (57), which optionally control gas exchange together with the piston-controlled ports (51, 53), are provided on at least the exhaust side. Gas intake may take place through rotary slide valve controls, or through an intake channel terminating in a crankshaft chamber of the cylinder rotor (5) and connected with the intake ports by overflow channels. In an internal combustion engine, a blower driven by a variable-speed motor may be provided for control of the degree of filling of the combustion chambers (37).
摘要:
Air/fuel mixture supply device for a two-stroke internal-combustion engine, of the type with scavenging by compressed air in the casing, comprising at least one cylinder, a piston capable of reciprocating motion in the cylinder, and a scavenging-air compression casing, the cylinder comprising at least one exhaust port, at least one transfer port and a port for introduction of an air/fuel mixture.A rotary closure member (19) driven in synchronism with the rotation of the engine is associated with the port (16) for introduction of the air/fuel mixture into the combustion chamber, this closure member being placed in an air reservoir (14) fed with air under a pressure greater than the pressure in the combustion chamber (10) after opening of the exhaust port (11).
摘要:
A two-cycle internal combustion engine is provided which comprises: a cylinder receiving a reciprocative piston and having a top portion provided with a combustion chamber in which a spark plug faces; an exhaust port laterally opening into the cylinder; at least one first scavenging port opening into the cylinder at one side of the exhaust port; and at least one second scavenging port opening into the cylinder at another side of the exhaust port opposite to said one side. Each of the first and second scavenging ports directs scavenging gas away from the exhaust port. The first scavenging port opens into the cylinder with an upward inclination for directing a first portion of the scavenging gas upwardly toward the top portion of the cylinder, whereas the second scavenging port is oriented to direct a second portion of the scavenging gas transversely of the cylinder toward a wall portion of the cylinder where the first scavenging port is formed.
摘要:
Counterbalancing device in a rotary machine comprising at least one piston axially movable in a cylinder, such as a heat engine and equipped per cylinder with at least one rotating distributor. The distributor, on the one hand, is driven in rotation at the same angular speed as the crankshaft of the machine and in the opposite direction to it and, on the other hand, comprises a counterbalancing compensating mass, of at least one part of the primary inertia of the piston-connecting rod-crank assembly corresponding to the cylinder. Application to the counterbalancing of monocylindrical engines with a crankshaft of reduced bulkiness.
摘要:
A two stroke engine having an exhaust port formed in the cylinder wall. At the upper portion of the exhaust port, there is provided a rotary type exhaust timing control valve which is adapted to be rotatably actuated to control the exhaust timing in accordance with the engine speed. The control valve is interconnected with the engine starting mechanism so that the control valve is forcedly driven by the starting mechanism to thereby eliminate valve seizure.
摘要:
The crank case of a twin cylinder engine is divided into two compartments, one for each cylinder. An intake chamber provided in the crank case between the two compartments has a port opening into each of the compartments. A valve disc on the crank shaft in each of the compartments overlies the port opening into the respective compartment and has an opening registrable with the port when the crank shaft is in a selected angular position to permit entry of a charge from the intake chamber into the respective compartment of the crank case. The charge may be a fuel-air mixture or, in the case of fuel injection into the crank case or the cylinder, it may be air. In either event oil may be included in the charge for lubrication. A seal is provided between the port of the intake chamber and the valve disc by a floating sealing ring of low friction material having a flat face which is pressed against the valve disc by a pressure ring of elastomeric material which may, for example, be of sponge structure or may be formed with a base portion and a selected number of flexible webs which press against the sealing ring and forming passageways for entry of crankcase gas under pressure between the base portion of the elastomeric ring and the sealing ring to partially balance pressure tending to unseat the sealing ring.