摘要:
A fuel injection system for multi-cylinder internal combustion engines, which has one injection unit per cylinder. Each injection unit includes one injection valve, one control valve, one flow limiting valve and one injection nozzle and is supplied with fuel via a fuel delivery line. Each injection unit also has a control unit which actuates the applicable control valve. This actuated control valve then actuates the associated injection valve, which in turn opens the fuel delivery line upstream of the injection nozzle. The flow limiting valve disposed upstream of the injection valve in the fuel delivery line blocks fuel flow when the fuel quantity flowing through the flow limiting valve attains a maximum fuel quantity, and the flow limiting valve does not open again until the fuel delivery line is blocked downstream of the flow limiting valve. To improve this system, each injection unit is assigned a sensor, with which a leak downstream of the flow limiting valve can be indicated; the control unit increases the injection duration, for the cylinder affected by a leak, enough though the correlated fuel quantity is greater than the maximum fuel quantity.
摘要:
The invention relates to a method and arrangement for controlling the fuel metered to an engine and especially to a diesel engine. The engine includes a fuel pump drive by a shaft for which injection start and injection end is fixed by a corresponding control of the electromagnetically actuated valve. The drive pulses for pump-delivery start and pump-delivery end are generated in dependence upon the analog signal of an angle sensor.
摘要:
A safety circuit arrangement for the high-voltage generator of an electrostatic filter, in particular of an electrostatic soot trap for diesel internal-combustion engines including a grounded filter housing and a filter electrode, has a power supply (15) which is connected to the high voltage generator (20) via controllable switching means (34). A and a shielded high-voltage cable (17), the high-voltage line (18) of which connects an output (24) of the high-voltage generator (20) to the filter electrode (14). To eliminate the risk to people caused by components carrying high voltage, the shield (19) of the high-voltage cable (17) is connected at one end to the filter housing (11), and at the other end to a control device (25) in such a way that an interruption of the shield (19) leads to the generation of a control signal for the switching means.
摘要:
An arrangement for removing soot particles and other solid particles from exhaust gas of power vehicles, comprises a soot deflector arranged to receive exhaust gas and having a first outlet for a cleaned exhaust gas stream and a second outlet for a soot-containing exhaust gas stream, and a soot collector connected with the second outlet and arranged for removing soot, the soot collector being formed as an exhaust gas-impermeable collecting container fixedly mountable in a power vehicle, the collecting container having a soot removing pipe arranged to extend through a vehicle wall outwardly and having a closeable and openable end, the collecting container also having a filter-covered exhaust gas outlet pipe, the soot collector having a removable closing cover arranged to close and to open the one end of the soot removing pipe, and a filter which covers the exhaust gas outlet pipe.
摘要:
A multi-cylinder internal combustion engine with an air intake system and an exhaust gas collection system has an exhaust gas recirculation apparatus for reducing toxic emissions. To operate the engine with a turbocharger and charge air cooler, the exhaust gas recirculation apparatus has an exhaust gas distributor, branching off from which is a number of end pipes corresponding to the number of cylinders of the engine. The exahust gas distributor is connected to the exhaust gas pipe of one cylinder, while the exhaust gas pipes of the other cylinders communicate with an exhaust gas manifold. The end pipes of the exhaust gas distributor each discharge into cylinder intake pipes immediately upstream of the inlet valve of the cylinders.
摘要:
A device for removing soot particles from exhaust gas of an internal combustion engine includes an electrical filter having a tubular housing and a central electrode in the form of a cylindrical shell coaxially arranged in the filter housing. The cylindrical shell is supported at its ends by insulators and is provided with a plurality of juxtaposed discharge points. The wall thickness of the cylindrical shell is about 0.05 mm and the discharge points are cut out in the wall of the cylindrical shell and being bent in radial direction toward the inner wall of the filter housing. The sides of the segments connecting the discharge points are oriented in the direction of the center axis of the electrode.
摘要:
To control the fuel injection pressure, in particular in high-pressure injection in self-igniting internal combustion engines, the pumping or supply phase of a cam-driven, intermittently operating pump piston of a fuel injection pump is determined by the closing time of a relief-metering valve and controlled in such a manner that the closing of the relief-metering valve for the supply onset (FB) is earlier, by the amount .DELTA..alpha., than the opening of control valves by way of which the fuel pumped by the pump piston is supplied to the individual injection locations. By means of the initial pumping amount or pre-stroke (.DELTA.h or .DELTA..alpha.), fuel is pumped into a closed system, and the injection pressure present at the injection valve at the instant of the opening (SB) is thus controlled.
摘要:
The invention is directed to a method and arrangement for controlling a self-igniting internal combustion engine. The arrangement includes at least one measured-value sensor, electronic control unit for forming a quantity signal for metering fuel, and a control unit for driving individual actuators for each cylinder. The actuators determine the quantity of fuel injected by the pump elements into the cylinders. Under specific conditions, a corrective unit is activated which determines corrective values specific to the cylinders for making the cylinders equal. The open-loop control unit applies the metering signal to the actuators in dependence upon the quantity signal and the corrective values.
摘要:
Device for injecting of fuel into internal combustion engines with an injection jet is provided with a stretched tension wire as a locking spring element for an outwardly opening valve locking member. The pretension of the tension wire is influenced by the current flow in an electrical current circuit which is fed to an electric resistor element being installed into the injection jet. The resistor element may be formed by the tension wire itself or by coil of an electromagnet, whose anchor is coupled with the tension wire. Thus, the opening pressure (P.sub.o) of the injection jet or the injection process can be controlled in a simple manner or may be formed accurately in accordance with a predetermined principle.
摘要:
A device is proposed for the supply of operating air-fuel mixtures including exhaust gases to internal combustion engines. Between the opening periods of the inlet valves of an internal combustion engine, precisely dispensed quantities of recirculated exhaust gas are pre-stored in the intake channel directly upstream of the inlet valve whereby a stratification of exhaust gas and fuel-air mixture in the combustion chamber of the engine is obtained.