摘要:
An apparatus for the combined blow-injection of fuel and air for fuel injection systems of internal combustion engines having a housing with a fuel connection an air connection and a blow-injection opening communicating with the air and fuel connections. Two valves are disposed in the housing and simultaneously actuated by an electromagnet. Both valves are disposed concentrically with one another, directly at the blow-injection opening to make it possible for the mixing ratio to be determined solely by the opening duration of the valves by means of synchronously clocked metering of fuel and air. The valve seat of the air valve and the valve seat of the fuel valve are carried in common by a hollow shaft valve member actuated by the electromagnet. For valve opening, the valve member of the air valve lifts inwardly of the housing and the valve member of the fuel valve lifts outwardly, and a stroke stop is disposed in the stroke of the valve member of the fuel valve in such a way that the maximum stroke path of the hollow shaft valve member is longer than that of the valve member of the fuel valve.
摘要:
A rotary piston compressor, particularly Root's type compressor, includes a housing which is made of only two portions, one of which is cut-shaped and accommodates pistons rotating in opposite directions, and the other of which is formed as a cover closing the end face of the first portion. The two portions are connected to each other and positioned relative to each so that they abut each other along a separation plane which extends centrally of a suction connection and a pressure connection formed on the housing diametrically opposed relative to each other.
摘要:
A distributor injection pump for internal combustion engines includes a high pressure pump for generating fuel injection pressure, a slide valve for defining fuel amounts to be injected and a piezoelectric adjustment member which actuates via a control chamber filled with fuel the slide of the slide valve. To prevent fomation of bubbles in the control chamber a rinsing conduit is provided, connected to the control chamber to rinse the latter. The rinsing conduit includes one portion connected to a fuel supply line and the other portion connected to a fuel return line leading to a fuel container.
摘要:
The invention is directed to an arrangement for controlling the quantity of fuel to be injected into an internal combustion engine. The arrangement includes at least one electrically operated control device determining the beginning and/or the end and/or the duration of the injection of fuel into the internal combustion engine. The electrically operated control device is influenced in dependence on its own control response. The arrangement of the invention thus makes it possible to correct the error resulting from variations in the pickup and dropout times of the electrically operated control device. Embodiments are described which take into account static and dynamic variations of the control response of the electrically operated control device.
摘要:
An apertured shield is disclosed having spring tongues, pointing radially inwards, each of the tongues having two lateral limiting edges and a longitudinal extent terminating in an irregular edge all of which edges define together an aperture. Adjacent spring tongues are overlapped in an area on the limiting edges, and are connected together at the circumference of the shield by being flanged into a retainer ring. The apertured shield is disposed in close proximity to the injection valve to cause a turbulence with superimposed spin flow of the medium flowing into the combustion chamber of an internal combustion engine.
摘要:
To render output of a polarographic sensor essentially independent of aging of electrodes and temperature effects of the solid electrolyte body, within the operating ranges of the sensor to measure the oxygen composition of exhaust gases, the solid electrolyte plate of, for example, 50 mm length, 8 mm width and 1 mm thickness has a sensing electrode system including a cathode (2), and an anode (3) applied thereto, connected to a voltage source (7) of controllable output voltage. An oxygen molecule diffusion barrier (6) is applied to the cathode electrode. Additionally, a further electrode pair (5,4) is applied to the solid electrolyte body (1), serially connected in the current limiting circuit including the control voltage source. The voltage across one (2,3) of the electrode pairs is measured and compared with the voltage across the other electrode pair (4,5) voltage source, since the resistance of the zirconium solid electrolyte body drops with increasing temperature at roughly the same rate as the increase in limit current flow with increasing temperature. Both electrode pairs (2,3; 4,5) on the solid electrolyte body (1) are exposed to the gases, the oxygen content of which is to be analyzed.
摘要:
A sensor (10) optically coupled to the combustion chamber (10') of an internal combustion (IC) engine is kept free from contaminating or dirt deposits, or the like, by subjecting the sensor to mechanical shocks or vibration. The mechanical shocks or vibration are obtained by the engine itself by controlling the engine to operate for a predetermined time period as set by a monostable flip-flop (FF) (18) under controlled knocking conditions, the shock waves within the combustion chamber causing flaking off or dropping off of contaminating deposits. Controlled knocking can be obtained by advancing ignition timing by additional control of an ignition system (19) in a direction of excessive spark advance, or overriding a knocking inhibiting system already present on the engine. The degree of contamination of the sensor can be determined, for example, by integrating the light received over a predetermined angle of rotation of the engine crankshaft and comparing this rotation with the amount of fuel supplied to the engine for combustion, for example by comparison with timing of a fuel injection pulse, or the like.
摘要:
To detect detonations in the combustion chamber of an internal combustion engine, the sensor system is constructed as a unit that may be threadedly engaged with the combustion chamber wall, the unit including an antechamber in the region near the combustion chamber and a detector being disposed at the base of the antechamber. The sensor system further may be equipped with a heater for burning off contaminations. In a further embodiment, at least one filter disc is disposed in front of the detector, so that a selective processing of the received optical signals is possible.
摘要:
To permit a layer construction, which is inexpensive and lends itself to mass production manufacture, a solid electrolyte body, in plate-like construction, with electrodes at either thereof is positioned in a housing with a portion thereof extending in the region where it is exposed to gases to be sensed; a porous cover is applied on one of the electrodes, the porous cover having a predetermined diffusion resistance to oxygen molecules. A flat insulating plate of approximately the same dimension as the solid electrolyte plate is positioned flat thereagainst, and a flat layer-like electrical heating element is secured on the flat insulating plate or, in other embodiments, against another insulating covering on the other side of the heating element as well, close to the electrodes and adjacent the plane surfaces of the body. The heating element and the electrodes of the sensing element are carried out as conductive tracks for connection to respective sources of operating or biassing potential and, with respect to the sensing electrodes, to an evaluation circuit.
摘要:
A method and system for controlling the temperature of a heat measuring sensor such as an oxygen sensor located in the exhaust line of an internal combustion engine so that the oxygen sensor will operate within optimal operating temperature. To accomplish this, a heating system including a control mechanism is provided for the oxygen sensor which adjusts the temperature of the oxygen sensor by controlling the output of a heater during the operation of the internal combustion engine according to characteristic engine operating conditions which have an effect on the temperature of the oxygen sensor, the most significant of which is engine load status. These conditions are sensed as a quantity by probes located so as to measure such operating conditions and send a signal to the control mechanism and its sensor heater.