Abstract: The invention relates to an injection system for injecting a fluid into a filter provided in an exhaust system, comprising at least two modules and at least one pressure compensation volume (44, 46, 48, 54, 56, 58), which is designed for feeding fluid to at least one of the modules and hydraulically connects at least two of the modules. Each module comprises at least one injection unit (40, 50, 60) designed for injecting fluid into the exhaust system.

Abstract: A fuel delivery pipe with damper function, being constructed of an elongate lower case provided at its bottom with a plurality of injection sockets for connection with fuel injection valves to be opened and closed by a controller unit; an upper case coupled with the lower case in a liquid-tight manner to form an internal space to be filled with fuel under pressure supplied from a fuel pump; a hollow partition wall member the whole periphery of which is brazed to an inner surface of the lower or upper case to form an air chamber isolated from the internal space; and a vent hole formed in the lower or upper case and sealed after communicating the air chamber with the atmosphere therethrough.

Abstract: A control apparatus is provided to control a fuel injection apparatus. The fuel injection apparatus includes an accumulator that accumulates high-pressure fuel, at least one injector that injects the high-pressure fuel accumulated in the accumulator into a cylinder of an internal combustion engine, and a pressure sensor that senses fuel pressure in the accumulator and outputs a signal indicative of the sensed fuel pressure. The control apparatus includes an estimator, a determiner, and a setter. The estimator estimates an actual injection duration of the injector. The determiner determines, during the actual injection duration estimated by the estimator, a value of the fuel pressure in the accumulator based on the signal output from the pressure sensor. The setter sets a manipulated variable for controlling fuel injection quantity of the injector based on the value of the fuel pressure determined by the determiner.

Abstract: A control apparatus is provided to control a fuel injection apparatus. The fuel injection apparatus includes an accumulator that accumulates high-pressure fuel, at least one injector that injects the high-pressure fuel accumulated in the accumulator into a cylinder of an internal combustion engine, and a pressure sensor that senses fuel pressure in the accumulator and outputs a signal indicative of the sensed fuel pressure. The control apparatus includes an estimator, a determiner, and a setter. The estimator estimates an actual injection duration of the injector. The determiner determines, during the actual injection duration estimated by the estimator, a value of the fuel pressure in the accumulator based on the signal output from the pressure sensor. The setter sets a manipulated variable for controlling fuel injection quantity of the injector based on the value of the fuel pressure determined by the determiner.

Abstract: A method is provided for controlling an internal combustion engine in a vehicle. The method includes adjusting a fuel injection amount during engine crank based on a barometric pressure. The barometric pressure is determined from at least one signal received from at least one transmitter external from the vehicle.

Abstract: A diesel engine includes a fuel injection control system communicating with a barometric pressure sensor and throttle position sensor. An elevation compensation controller adjusts engine speed and fuel injection timing at high altitudes in response to the sensed barometric pressure and engine throttle position. Engine speed is increased or decreased by predetermined values with changes in barometric pressure and throttle position to optimize engine performance and efficiency under various pressure conditions while reducing exhaust emissions.

Abstract: A tool for driving a nail or other fastener is actuated by a caseless propellant charge formed of combustible material that is transported into a combustion chamber on a strip. The propellant charge is ignited by striking a sensitizer portion of the charge at an oblique angle. The ignition member intermixes the sensitizer material with an oxidizer layer of the surface of the propellant charge, resulting in combustion of the charge. When ignited, the propellant charge is compressingly interposed between an orifice plate and a movable portion of the combustion chamber. The orifice plate includes a pedestal with an annular compression surface that separates the surface of the ignition area from the remaining surfaces of the charge, insuring that ignition gases are forced through the charge. An annular C-shaped ring is interposed between the orifice plate and the movable portion of the combustion chamber.

Abstract: An improved fuel injection control apparatus, in which a reference pressure is provided to a pressure regulator, for simplifying the fuel supply system by preventing the fuel quantity injected from injection valves into an engine from being influenced by variations in the air intake pressure. A pressure regulating device disposed in a fuel supply pipe between a fuel pump and the fuel injection valve regulates the pressure of fuel supplied from the fuel pump to the fuel injection valve so that the pressure is proportional to the predetermined pressure, without returning fuel from the injection valve to the fuel tank. An intake pressure detecting device detects the pressure in the intake pipe, and a fuel injection quantity correcting device corrects the fuel injection quantity according to deviations of the fuel pressure regulated by the pressure regulating device from a proper value due to the differential pressure between the pre-determined pressure of the pressure regulating means and the intake pressure.

Abstract: A method of determining the prevailing atmospheric air pressure in a pressure-controlled injection system wherein the intake manifold pressure (Ps), measured when a predetermined load condition of the engine has been detected, is multiplied by a predetermined, preferably speed-dependent factor (K) to provide a value representative of the atmospheric air pressure (Po).

Abstract: The pressure regulator comprises a valving element caused to open or close a bleed port of the petrol circuit, and a diaphragm subjected to the pressure of said petrol and to a pressure which is a function of the engine intake pressure, said diaphragm being balanced by a force due to the action of an aneroid capsule also subjected to said pressure which is a function of the intake pressure.

Abstract: An altitude compensation unit for governing the combustion mixture in an automotive vehicle engine carburetor in response to changes in altitude above a predetermined altitude comprising a housing, an aneroid bellows anchored to the housing, and a force balancing pressure transducer valve fixed with respect to the housing. The transducer valve procides an output fluid pressure which varies in relation to the value of a force applied to the valve, with the output pressure force and the input force acting in opposition to each other on a valve transducer element. The transducer element is disposed in a predetermined position when the forces are balanced. A force transmission member supported by the housing transmits force between the capsule and the transducer element. A transducer output pressure responsive actuator alters the combustion mixture in response to output pressure from the transducer.

Abstract: A fuel injection pump for internal combustion engines is proposed which has a hydraulic injection instant adjuster, which is exposed to an rpm-dependent pressure established with the aid of a pressure control valve. The control of the pressure control valve is effected by means of varying the control pressure acting upon it. This is accomplished with the aid of a pressure valve, which has a slide exposed to a force variable in accordance with altitude, and the control pressure of the pressure control valve can be modified by means of this slide.

Abstract: A compensation value computing method for an electronic fuel injection controlled engine according to this invention measures an operating parameter for detecting the idling, low-load and high-load running conditions of the engine. First, second and third memory locations are provided corresponding, respectively, to these running conditions of the engine to compute feedback air-fuel ratios on the basis of feedback signals from an air-fuel ratio sensor. Values in the memory are compensated corresponding to the detected running conditions of the engine on the basis of the deviation of a feedback air-fuel ratio from the base air-fuel ratio.

Abstract: An air/fuel ratio control system for use with an internal combustion engine. The system is provided with an electrical circuit which operatively connects an O.sub.2 sensor with fuel quantity adjusting means in a manner effecting feedback control of the air/fuel ratio of a mixture produced by the fuel adjusting means and being supplied to the engine in response to the output signal of the O.sub.2 sensor. The electrical circuit includes means operable during open loop control of the air/fuel ratio under a particular engine operating condition, for controlling the fuel quantity adjusting means so as to obtain a mixture having a predetermined air/fuel ratio appropriate for the particular engine operating condition, irrespective of the O.sub.2 sensor output signal, and means for correcting the above predetermined ratio in response to atmospheric pressure. The electrical circuit further comprises fail safe means for detecting a malfunction in the atmospheric pressure sensor.

Abstract: A fuel injection pump having a hydraulic adjuster for the instant of injection is proposed, in which in addition to the rpm-proportional adjustment of the onset of injection, a supplementary variation of the onset of injection occurs in accordance with pressure related to altitude.

Abstract: An electronic control system which electronically controls the air fuel ratio of a mixture being supplied to a gasoline engine in highlands. An orifice device is provided in a passage through which secondary air is supplied to the venturi section of the engine carburetor. An electronic control unit carries out programmed control of the orifice opening of the orifice device in response to the atmospheric pressure and the engine temperature to create a reference pressure. A further electronic control unit drives a second air control valve provided in the secondary air supply passage along a predetermined operating characteristic pattern in response to the difference between the reference pressure and an actual pressure present in the venturi section of the carburetor. A mixture having an optimum air fuel ratio corresponding to the atmospheric pressure can thus be supplied to the engine from the carburetor.

Abstract: An altitude compensation device for an internal combustion engine having a vacuum-operated ignition timing advancer and a carburetor has an atmospheric pressure variation responsive valve operative to control the air bleed of the carburetor and the vacuum fed to the vacuum advancer such that, as the atmospheric air pressure is lowered due to increase of the altitude, the air flow into the advancer vacuum chamber is decreased to advance the ignition timing while the air flow into the carburetor air bleed passage is increased to increase the air-fuel ratio of the air-fuel mixture produced by the carburetor.

Abstract: A fuel supply apparatus for an internal combustion engines comprises a throttle valve disposed in an intake conduit leading to the internal combustion engine, an air valve disposed in the intake conduit upstream of the throttle valve so as to define an air pressure chamber in the intake conduit in cooperation with the throttle valve, a device for controlling the air valve in response to the pressure prevailing in the air pressure chamber so that the pressure be maintained at a substantially constant level, and a fuel metering device including a variable throttle passage provided in a fuel feed conduit opening in the intake conduit through a fuel injection valve and interlocked with the air valve to be controlled so that the flow section area of the throttle passage may be proportional to the opening degree of the air valve, and a device for maintaining difference in pressure produced across the variable throttle passage at a predetermined value.