Abstract:
A fuel injection apparatus for internal combustion engines, in particular food Diesel engines, including a mechanically driven injection pump, preferably embodies as a pump/nozzle assembly, in which the piston speed of the pump piston is variable for the purpose of controlling the peak pressure. By means of a control apparatus, operating in accordance with rpm, the stroke motion which is transmitted from a drive cam to the pump piston is varied by shifting the effective cam range during the fuel supply stroke, or by varying the lever ratio in the drive apparatus of the pump piston in such a manner that the piston speed, which otherwise varies in proportion to the engine speed, remains either substantially constant or is adapted to a predetermined speed variation. As an additional capability, the apparatus includes a correction apparatus which compensates for an undesired variation in the onset of the fuel supply caused by the control apparatus or corrects it to a predetermined value dependent on operating characteristics of the engine.
Abstract:
A mixture preparation apparatus for mixture-compressing, externally ignited internal combustion engines, which serves to improve the output and to reduce both fuel consumption and the proportion of toxic components in the exhaust gas of the internal combustion engine. The mixture preparation apparatus comprises a rotatable vane body having vanes, or scoop members, disposed in the air intake line across the air flow direction, and including a portion arranged to extend into a section of the air intake line. The rotatable scoops are disposed in the region of an annular flow channel, so that between the inflow and the outflow side of the flow channel a constant, yet arbitrarily variable pressure difference can be regulated. The structure revealed requires only a small air component to drive the vane body, and thus only a limited energy requirement is present. The axial displacement motion of the vane body or of a cover body connected to the vane body represents a standard for the induced air quantity and can serve to control a fuel apportionment apparatus.
Abstract:
The invention relates to fuel injection nozzles for internal combustion engines provided with a nozzle body one end of which includes plural fuel injection spray apertures with plural telescopable valve needles slidably positioned in the nozzle body and arranged to control feed to the spray apertures. At least one valve needle is controllable by an adjusting piston subjected to fuel supply.
Abstract:
A control device for diesel-injection internal combustion engines, whose hydraulically activated adjusting member moves the regulating rod of the fuel injection pump in the "stop" direction when the discharge of the hydraulic medium is blocked by a magnetic valve, and simultaneously serves as an arbitrarily engageable full-load or delivery rate reducing stop for the regulating rod. The control device includes a first electromagnet, which activates the valve member of the magnetic valve, and a second electromagnet, whose control member limits the adjusting movement of the adjusting member, which can be controlled by the valve member of the first electromagnet, to a position that serves as the full-load or lower rate stop for the regulating rod of the injection pump, when the second electromagnet is engaged. This limitation takes place mechanically or by opening a return line, which determines the position of an adjusting piston that is connected with the adjusting member.
Abstract:
A fuel injection pump with a simultaneously rotating and reciprocating fuel delivery piston and with rpm-dependent fuel quantity control exerted by a centrifugal force governor. The fuel delivery piston is powered by a primary shaft which also drives a secondary shaft of the governor through gears. The governor shaft powers a concentric fuel pump which supplies rpm-dependently pressurized fuel to the fuel delivery piston.
Abstract:
In an exhaust gas purifying apparatus which includes a reactor in the exhaust line of an internal combustion engine there is provided a heater burner to which there is delivered an air-fuel mixture and which heats the reactor for rapidly bringing it to operating temperatures when the engine is started. In the air conduit through which combustion air for the air-fuel mixture is delivered to the burner there is provided a valve controlled in such a manner that the flow rate of combustion air remains constant and is thus independent of the said counterpressure at the heating burner and the output delivery of the air pump driving the combustion air.
Abstract:
A fuel injection system for regulating fuel flow so as to maintain a desired fuel-air mixture in a mixture compressing, externally ignited internal combustion engine includes the air intake suction tube of the internal combustion engine. A measuring device is provided for measuring the quantity of air passing through the air intake suction tube. A pressure control device, responsive to output from the measuring device produces, as its output, a variable fluid pressure head. At least one fuel metering valve is responsive to the output from the pressure control device. This fuel metering valve has a movable member, preferably a slide valve piston, which is actuated in two control directions. The fuel metering valve functions to meter out fuel, in desired proportion, into the quantity of air streaming through the suction tube.
Abstract:
A fuel injection system for internal combustion engines, having a pump chamber defined by the pump piston and a pressure chamber adapted to communicate with the injection nozzle; and further including an intermediate piston disposed between the two work chambers, in which during the compression stroke of the intermediate piston a throttle conduit which branches off from the pump chamber can be opened, in order to allow some of the fluid to flow out of the pump chamber while leaving the injection quantity located in the pressure chamber unchanged, to thereby attain a lengthening of the injection duration.
Abstract:
A fuel injection device for internal combustion engines including a pump nozzle, a pump piston, preferably driven via a drive cam, and a pressure chamber disconnected from a pump chamber by an intermediate piston that preferably assumes its end postions in its working stroke, with a pressure line leading from the pressure chamber to an injection nozzle. The control of fuel quantity into the pressure chamber is effected via a control valve, preferably embodied as a magnetic valve, in a feed line that is also controlled by a control slide driven in synchronism with the pump piston. During one intake stroke segment of the pump piston, the feed line is connected to the pressure chamber; during another intake stroke segment, the feed pump is connected to a reservoir, so as to control the fill volume of the reservoir as a function of time. During the first compression stroke segment fuel is positively displaced from the pump chamber to the reservoir and once it is refilled with a variable fill quantity, the supply onset can be initiated by suitably driving the intermediate piston.
Abstract:
A fuel injection device for internal combustion engines having externally supplied ignition, which enables introducing fuel injection quantities into combustion chambers in a manner that is controlled precisely in terms of quantity and of the instant of injection. The fuel injection device includes a first magnet valve by which fuel at injection pressure is pre-stored in a reservoir chamber, and the pre-stored quantity is ascertained by measurement of the deflection stroke of a reservoir piston which defines the reservoir chamber. Once the pre-storing process is complete, the pre-stored fuel quantity is then delivered to the injection valve with the air of a second magnetic valve. All that the fuel injection pump needs besides the two magnet valves and a control unit is a pre-feed pump, which pumps fuel into a high-pressure reservoir, so that while making limited demands on the pump generating the high pressure, a simple and very precisely functioning fuel injection device is created.