The invention relates to a gas supply system (1) for a reciprocating piston internal combustion engine, in particular a longitudinally scavenged two-stroke large diesel engine, wherein the gas supply system (1) comprises a gas inlet valve (2) with a gas inlet nozzle (3), which is designed such that…
The objective of the present invention is to improve the heat conductance of the center electrode of the spark plug in which its center electrode protrudes to the combustion chamber from the defining surface of the chamber. The ignition plug of the present invention comprises a center electrode to…
An in-cylinder pressure detecting device of a direct injection type internal combustion engine is provided in which a ring-shaped pressure detection element (34) surrounding a fuel injection hole (33b) is provided in the vicinity of an extremity of an injector (20) that injects fuel into a…
A four-stroke engine (2, 202) includes a cylinder head (18, 218), a cylinder body (17) connected to the cylinder head (18, 218) and a fuel injection valve (34). The cylinder head (18, 218) defines a combustion chamber (20), an intake port (21, 221) that communicates with the combustion chamber…
A four-stroke engine (1, 201, 301) includes a cylinder head (3) in which a combustion chamber (12), an intake port (13, 413, 513) that communicates with the combustion chamber (12), and a housing hole (20, 320) that passes through the combustion chamber (12) and through the intake port (13, 413…
When a direct injection type internal combustion engine is in an operating state, a fuel is split and jetted into a cylinder of the internal combustion engine and split injections are performed in a manner to make a ratio of a piston travel and an injection pulse width of split injection constant…
Provided is a spark-ignition internal combustion engine capable of ensuring engine output power while setting a geometric compression ratio of an engine body to a high value. In the spark-ignition internal combustion engine, each of a clearance between a top surface (3a) of a piston (3) located at…
The present invention relates to a direct injection engine (2) and a controller for the engine (2), which can realize super-retard combustion under high backpressure and can minimize an emission amount of HC at the startup. A cavity (30) is formed in a piston (7) such that fuel spray injected from…
The invention relates to an internal combustion engine which injects fuel directly into a cylinder 104 and ignites air-fuel mixture formed in the cylinder, wherein each fuel injection of said internal combustion engine comprises a lead spray 105 which moves faster and a main spray 106 which moves…
When, with a piston assuming the top dead center (TDC) on the compression stroke, a fuel is injected from a nozzle of a fuel injection valve, the injected fuel from the nozzle is guided to reach electrodes of a spark plug by a concave surface defined by a crown portion of a piston. A control unit…
A system for controlling fuel injection in an engine. The engine includes an intake passage (15), an intake passage injector (18), a cylinder (11) having a combustion chamber (10), and a cylinder injector (17) for injecting a target amount of fuel into the combustion chamber (10). The system…
When an inner wall (3a) of a cylinder head (3) is viewed along an axis of a cylinder (1a), a line that passes through a center of a fuel injection port (17) and a center of a valve opening adjacent to the injection port is defined as a first line, and a line that is perpendicular to the first line…
The engine has a combustion chamber(s) bounded by a cylinder, a cylinder head with 2 inlet valves, 2 exhaust valves, ignition and injection devices and an at least partly common induction air inlet channel. Inlet and exhaust valve shafts span respective planes essentially parallel to a longitudinal…
At least two orifices (3a) for fuel supply are formed and aligned in the direct fuel injector (1) at a position wherein the fuel jets (4a) from the orifices collide with one another at a collision point (2). An Independent claim is also included for an internal combustion engine.
An internal combustion engine which injects fuel directly into a cylinder 104 and ignites air-fuel mixture formed in the cylinder, wherein each fuel injection of said internal combustion engine comprises a lead spray 105 which moves faster and a main spray 106 which moves slower, the lead spray 105…
The invention relates to a method that enables the inclination of the injection direction and the distribution of the penetration force of spray to be adjusted over a wide range, and an axially symmetrical spray shape to be obtained even when the injection hole is inclined, or the shape of the…
The combustion stage in the Otto cycle of an internal combustion motor, with direct fuel injection, has the fuel injected into the cylinder (1) in a double-cone spray formation (2) from a multi-jet fuel injector (7). The fuel spray at the jet side is at an angle of 35-55 degrees in the upper…
By setting the configuration of a cavity (25) of a piston (5) appropriately, tumble is produced in air that is aspirated into a combustion chamber (6) inside a cylinder (3) from an intake port (8), and by means of this tumble, the spray of fuel injected by a fuel injector (12) is caused to gather…
In a control system A for an in-cylinder direct injection engine, an actual port intake air density ganmap is calculated based on the intake air temperature thae and the atmospheric pressure atp, a reference port intake air density ganmap* corresponding to the current operating conditions of the…
A direct cylinder injection-type spark ignition internal combustion engine comprising a spark plug and a fuel injection valve for directly injecting fuel into the cylinder, wherein the fuel injected from said fuel injection valve passes near said spark plug directly or being deflected, and a crank…
This invention proposes a fuel injection control device for a direct injection engine which performs stable stratified charge combustion by increasing the degree of charge stratification in the air-fuel mixture through discrete double fuel injection by a fuel injection valve (12) during the…
The invention relates to an internal combustion engine with direct injection and supercharging in which the ignitability deteriorates because the density of the fuel at the spray center becomes excessive due to the shrinkage of the fuel spray under the supercharging. As a result, the density of the…
A piston for an in-cylinder injection engine capable of effecting an increased compression ratio and a higher output without difficulty in layout and smoke generation. Said piston for an in-cylinder injection engine in which intake valves and exhaust valves are provided in a cylinder head and fuel…
The invention relates to an internal combustion engine in which a fuel spray is directed toward an ignition plug (700). To a L shape fuel injection hole outlet portion of a swirl type fuel injector L shape cut out is provided and the fuel spray (100) is formed with a deflection fuel spray (100)…
The engine has two inlet valves (5) with fully variable lifts located in the combustion chamber bowl (1). The injector (4) away from the circumferential region (1') of the bowl in the direction of the inlet valves is located with its injector tip (6) centrally between them in such a way that the…
Internal combustion engine of an in-cylinder fuel injection type with at least one piston provided within a cylinder bore having a cylinder bore axis; a recess which is provided on a top surface of the piston; said recess extends from a first to a second section thereof and an imaginary line in…
A stratified-charge combustion chamber system for a direct-injection spark-ignited (DISI) engine with a swirl-type airflow (32). An asymmetrical combustion bowl (25) design in the top wall of the piston (12) provides a wide area (40) on the downstream side of the swirl flow (32) and a harbour area…
A stratified-charge combustion system design for direct-injection spark-ignited engines with the piston bowl (42) in the exhaust-valve side. The air flow from the inlet valve provides a normal tumble in-cylinder air flow. The fuel injector (34) is positioned on the intake-valve side of the…
The combustion engine comprises a combustion chamber which is formed between the underside of the cylinder head (11), the upper side of the butt, and a cylinder tread. Two air inlet channels (15) with valves, an air outlet channel (16) with a valve, as well as two spark plugs (17) are provided in…