摘要:
Systems and methods are provided for a direct-injection engine having at least one cylinder head comprising at least one cylinder, in which each cylinder is assigned an injection nozzle which: is at least connectable to a fuel reservoir which serves for storing fuel, is secured in a nozzle holder, and is fitted with a nozzle needle which is displaceable in the direction of a longitudinal axis in a nozzle needle guide and, opens up at least one nozzle hole in order to introduce fuel. A control piston may be mounted movably on the injection nozzle, is displaceable in a translatory manner along the longitudinal axis of the injection nozzle between an inoperative position and a working position, and closes at least one fluid connection in the inoperative position and opens up same in the working position in order to introduce water into the associated cylinder.
摘要:
A reciprocating piston engine has a cylinder with a transfer port and an exhaust port, wherein the transfer port and exhaust port are at least partially coincident and are provided with a port valve. The engine includes a pump having a divided chamber therein, one side of the chamber being connected to a crankcase via a connecting port, and the other side of the chamber having an inlet port, an outlet port, and a valve to ensure unidirectional flow therethrough. The chamber is divided by a moving member responsive to variations in pressure in the crankcase to cause flow through the other side of the chamber.
摘要:
Accordingly, the reader will see that this invention is a fuel injection pump which uses an opposed pair of springs acting in parallel to affect the movement of a piston used to pump fuel. Engine pressure pulses, preferably from an engine cylinder, apply a force on the piston and the springs affect the piston's movement to affect the quantity of fuel injected. The spring rates of the springs and their pre-load, or compression, can be adjusted to affect the fuel injection quantity. Proper selection of these spring rates and compressions allows the user to change the pump's specific output and shape this output as a function of engine torque.
摘要:
A two-cycle internal combustion engine includes two opposed pistons reciprocatable within a cylinder, between which an air-fuel mixture is injected and ignited. One of the pistons, a compression piston, is connected to a rotatable flywheel for storing energy from reciprocation of the compression piston during the adiabatic expansion stroke. The other piston, a power piston, is attached to a pump piston which operates in a hydraulic pump to displace a hydrostatic fluid at a constant reaction pressure but at a variable stroke. Work is removed from this engine through the hydrostatic fluid, which can be fed to a hydrostatic drive unit. The flywheel is not connected to the primary load, but is used principally to drive the compression piston upward during the compression stroke of the engine. During the compression stroke, the air-fuel mixture is compressed and ignited to a pressure determined by the hydraulic reaction pressure in the hydraulic pump. The gas column is pushed upward in the cylinder, pushing the power piston upward to displace hydraulic fluid in the hydraulic pump. Ignition of the air-fuel mixture occurs during the compression stroke before the compression piston reaches top-dead-center, and can be advanced or delayed to decrease or increase the energy stored in the flywheel.
摘要:
The invention is a pulsed, hydraulically actuated fuel injector ignitor system for an internal combustion engine with combustion chambers and a fuel injector, comprising an outer shell containing a fuel inlet cavity, a fuel supply and scavenging chamber supplied with fuel from the inlet cavity through the rod bore of the injector rod, and a fuel pressure chamber, which is resupplied through check valve from the supply chamber after each injection has taken place. The pressure chamber has a poppet valve responsive to a predetermined fuel pressure in the pressure chamber, resulting from the intrusion of injector piston into the pressure chamber, thereby spraying fuel into the combustion chamber through a hot-throated venturi and igniting the fuel as it passes through venturi. Concentric open-ended cylinders form the control body assembly and are positioned between the base assembly and the fluid manifold head cap and having alternate open-ended cylinders in communication with sliding contact. All cylinders are supported by struts which are firmly attached to a rod. Electro-rheological fluid flows freely through the cylinders of the control body assembly until a high voltage is applied to cylinders, thus solidifying the electro-rheological fluid between cylinders and their adjacent ground potential cylinders. This produces hydraulic pressure in the inlet section of the fluid manifold head cap which forces the assembly and rod downward and piston into the pressure chamber. Removal of the solidifying voltage from cylinders returns the electro-rheological fluid to a liquid state, thereby stopping injection.
摘要:
In an internal combustion engine with combustion chambers (CC'S) (538), a fuel injector (FI) comprising an outer shell (628) containing a fuel supply cavity (FSC) (530) having an openable valve (546) for storing fuel, a control body assembly (CBA) (520) within the outer shell (628). A rod (512) extends from FSC through CBA along the length of the outer shell with piston (518) formed thereon. An internal bore (534) extends therethrough from the side of a closed end of rod (512) which is movable into the FSC for carrying fuel from the FSC to the CC. A rod supporting base assembly (562), responsive to a predetermined CC pressure increase causes rod (512) to enter FSC, closing valve (546) to cease fuel from entering FSC and exposing bore (534) to force the pressurized fuel in the FSC down bore into the CC. Concentric open ended cylinders (OEC'S) (510) are positioned between the CBA and the base assembly with alternate OEC'S (514) secured to CBA and the other OEC'S (516) secured to base assembly (562). An E-R mixture between FSC and base assembly becomes solidified between the OEC'S when proper voltage is applied thereacross. The CBA responds to the fluid E-R mixture and a certain CC pressure to enable rod (512) to enter FSC, forcing fuel down rod bore (534) into the CC, and responsive to the solid E-R mixture to stop movement of rod (512), thereby stopping fuel flow down rod bore (534) into CC (538).
摘要:
Improved method and apparatus for injecting fuel for a diesel engine are disclosed which are constructed such that a push rod is disposed in a nozzle body and fuel is injected into a combustion chamber by actuating the push rod. The improvement of the invention consists in that push rod actuating force is accumulated for a certain period of time while the push rod is stationarily held by means of an electromagnetic coil which is energized. Fuel injection is thus carried out by releasing the accumulated force by way of deenergization of the electro-magnetic coil. In an embodiment of the invention push rod actuating force is extracted from a cam driving mechanism and a coil spring disposed between the cam driving mechanism and the push rod serves as a push rod actuating force accumulating means. In a modified embodiment of the invention push rod actuating force is extracted from a combination of an auxiliary piston and a rocker arm and an auxiliary cylinder serves as a push rod actuating force accumulating means. Preferably, an auxiliary electromagnetic coil is disposed on the nozzle body so as to assist in actuation of the push rod. In another modified embodiment of the invention similar to the preceding one a hydraulic system is provided between the auxiliary piston and the push rod as a push rod actuating force accumulating means.
摘要:
An injector for delivering fuel directly to an engine combustion chamber has a sleeve which responds to the combustion chamber pressure and cooperates with a piston in the injector to pressurize the fuel. A single valve in the injector is controlled both to permit supply of fuel to the injector and to allow injection at the appropriate time and in an appropriate amount.
摘要:
FIG. 1 shows a fuel injector having a valve 54 that closes an outlet 50 in a housing 10 by means of a spring 22, excitation of a magnet 14 opening the valve; the injector has a toroidal chamber 62 containing an annular piston 66 subject to combustion chamber pressures on one side or end by means of a vent 72 and filled with fuel acting against its opposite side, a spring 70 biasing the piston to charge the piston chamber or reservoir 80 with a pressure equal to the pressure of the fuel passing through inlet check valve 38 connected to reservoir 80.