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WO/2002/012696A1 |
A method and apparatus for detecting a valve position includes the step of providing a non-actuating alternating current signal (24) to a drive coil signal (22). As a valve plunger (14) moves within the coil, the non-actuating signal cha...
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WO/2002/003038A1 |
A flow meter having a laser Doppler anemometer (LDA) which measures the instantaneous centerline velocity of fluid flow in a pipe and processes the instantaneous velocity so obtained to compute the volumetric flow rate, mass rate, and ot...
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WO/2001/086131A1 |
The invention relates to a method for determining the position of a piston (5) of a 1-cylinder high pressure pump (1) of a fuel metering system of a direct injection internal combustion engine in relation to the angular position of the c...
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WO/2001/081747A1 |
Disclosed is a fuel supply system (1) for an internal combustion engine, especially in a motor vehicle. In said fuel supply system (1), fuel can be pumped by a pump (6, 10) into a pressure accumulator (2). The pressure inside the pressur...
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WO/2001/081746A1 |
The invention relates to a fuel supply system (1) for an internal combustion engine, especially of an automobile. In said fuel supply system (1), fuel can be pumped into a pressure accumulator (2) by a pump (6, 10). The pressure in said ...
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WO/2001/075289A1 |
The invention relates to a method for the diagnosis of a control voltage for a piezoelectric actuator of an injection valve. The control voltage is measured for the individual phases of the injection procedure. A corresponding tolerance ...
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WO/2001/073282A1 |
The invention relates to a method for determining the rail pressure of an injection valve having a voltage-controlled piezoelectric actuator. Said piezoelectric actuator (2) actuates a nozzle needle (11) by means of a hydraulic coupler (...
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WO/2001/071174A1 |
The invention relates to a method and device for the control of a solenoid valve for fuel injection in an internal combustion engine. The control phase thereof is divided into an operating phase (T¿A?), during which the one valve needle...
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WO/2001/063121A1 |
A method is provided for detecting injection events in a piezoelectric actuated fuel injector. The method comprises the steps of: (a) providing a piezoelectric element for actuating the injector valve; (b) applying a voltage to the piezo...
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WO/2001/055573A2 |
The invention relates to a method and a device for calibrating a pressure sensor (7) of a fuel dosing system of an internal combustion engine. Said fuel dosing system comprises a high-pressure pump (2) that delivers fuel from a low-press...
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WO/2001/055584A2 |
An injector (1) which comprises a plunger (2), a solenoid coil (3), and a conical return spring (11) which is driving a primary high pressure pump assembly consisting of a primary piston (4) within a primary cylinder (5) together with pr...
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WO/2001/029411A1 |
The invention relates to a method and a device for the diagnosis of a fuel supply system pertaining to an internal combustion engine. The aim of the invention is to enable differentiation of an error with regard to the individual compone...
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WO/2001/027454A1 |
The injectors (6¿i?) allocated to the cylinders are supplied with fuel by a common injection train and their opening time is calculated and controlled by a computer. According to the invention, a) any possible overlap in the opening tim...
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WO/2001/025621A1 |
The invention relates to a fuel injection valve for internal combustion engines and a method for producing the same. The inventive valve comprises a valve base body (2). A piston-shaped and axially moveable valve element (12) is arranged...
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WO/2001/025620A1 |
The invention relates to a method for adjusting the amount of flow at a fuel injection valve which is provided with an excitable actuating element and a valve closing element that can be axially moved along a longitudinal axis of the val...
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WO/2001/024321A1 |
The invention relates to a pressure-tight electric leadthrough comprising a separating element (10) made from a plurality of ceramic layers (11, 12, 13) whereby one section of a line element (20) respectively extends therethrough. The se...
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WO/2001/023734A1 |
The operation of internal combustion engines in unfavorable operating conditions can cause deposits to form in the combustion chamber (4). The invention relates to a method and a device for operating an internal combustion engine (1), es...
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WO/2001/011228A1 |
The invention relates to a method for dosing fuel using a fuel-injection valve (1) especially an injection valve for fuel injection internal combustion engines (3). It comprises one piezoelectric or magnetorestrictive actuator (16) and a...
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WO/2001/011230A1 |
An isolation valve (10b) for attachment to a fuel pump or fuel distribution block (44) of an engine is described. The valve (10b) comprises a valve and adaptor in a single body for direct attachment to a socket in the fuel pump or distri...
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WO/2001/007776A1 |
The invention relates to a flat tubular pressure damper (1) for damping fluid pressure oscillations in fluid lines, in particular, fuel pressure oscillations in motor vehicle fuel supply lines. Said damper comprises at least one oblong c...
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WO/2001/007770A1 |
The invention relates to a system and to a method for controlling or regulating an internal combustion engine (6). According to the invention, a transmitter disk (16) on the crankshaft (12) and a sensing element (15) continuously detect ...
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WO/2000/079125A1 |
The measuring device comprises a first measuring chamber (8) into which fuel is injected, a pressure sensor (62) and a temperature sensor (60) respectively measuring pressure and temperature in the first measuring chamber (8), means enab...
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WO/2000/063552A1 |
A cleaning device (1) comprises a body (2), a cleaning liquid reservoir (3), a pump (4), a pressure pipe-line (9-10), cleaning chambers (5-6) with a place for fixing of at least one electric and mechanical injectors. Whereas, the device ...
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WO/2000/052326A1 |
The invention relates to a system and a method for controlling a control valve for a diesel fuel injection system, comprising a fuel injector with a pressure amplifier. The control valve (10) is positioned upstream of the pressure amplif...
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WO/2000/020755A1 |
The invention relates to a method for electronically trimming at least one fluid injection pump. According to said method, a control module of an electronic control device detects a control signal which is corrected in accordance with th...
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WO/2000/019168A1 |
The aim of the invention is to measure the angular distribution of a liquid spray which is sprayed by a spraying element (5), especially of a fuel spray which is sprayed by a fuel injection valve. To this end, partial sprayed quantities ...
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WO/2000/019090A1 |
A method for adjusting the on-time of each hydraulically-actuated fuel injector (10) within a hydraulically-actuated fuel injection system (60) is disclosed. At least two spray tests are performed on the fuel injector (10) prior to its i...
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WO/1999/067617A1 |
The present invention provides a flowmeter (10) which measures the flowrate of a fuel injector (12) by monitoring the pressure drop across a variable orifice valve (52) by use of a pressure sensor (18) with no moving mechanical parts. Th...
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WO/1999/053181A2 |
A fuel system leakage detector (1) includes a pressure source (3)and a test head (4) adapted to be coupled to a fuel system (17) of a vehicle (19) with engine (21), fuel tank (18), fuel filler neck (20), fuel closure cap (16) and evapora...
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WO/1999/045259A2 |
A fuel system includes a pair of electronically controllable high pressure fuel pumps (22) operable to supply high pressure fuel from a lower pressure fuel source to a high pressure fuel collection chamber (34) having a pressure sensor (...
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WO/1999/045261A1 |
A fuel system includes a pair of electronically controllable high pressure fuel pumps (22) operable to supply high pressure fuel from a lower pressure fuel source (14) to a high pressure fuel accumulator (34) having a pressure sensor (72...
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WO/1999/032783A1 |
A fuel injector (10') employs at least one sensing device for sensing material deformations occurring in the injector components during usage to thereby monitor injector performance. The sensing device (62') is preferably at least one of...
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WO/1999/019696A1 |
The invention relates to a device and a method for calibrating hydraulic flow-rate measuring systems, characterised by a receptacle which is connected to the flow-rate measuring system and which can be filled with a hydraulic medium. A c...
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WO/1999/010751A1 |
A diagnostic/control device for fuel injected internal combustion engines comprising a control system (14) connectable via leads (16) to the fuel injectors (10) after disconnection therefrom of an engine management computer (11), the lat...
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WO/1998/040700A1 |
The invention relates to a device for measuring hydraulic discharge and leakage in a test piece, comprising a measuring section configured as an inflow pipe approximately perpendicular to the test piece and a capacitive sensor located on...
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WO/1998/040713A1 |
The invention relates to a device for measuring hydraulic discharge and leakage in a test piece, comprising a measuring section to which the test piece is connected, as well as a capacitive sensor located along the measuring section. Sai...
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WO/1998/036171A1 |
Apparatus for testing an injector nozzle comprising a pump and nozzle holder unit (10), a collecting chamber communicating with an outlet port (32) for collecting fluid delivered by the nozzle, a first fluid line (34) extending between t...
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WO/1998/035210A1 |
Fuel injectors (10) for internal combustion engines are modified and equipped with fiber optic fuel pressure sensors (12) and fiber optic combustion pressure sensors (14). The combustion pressure sensors (14) are located in separate chan...
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WO/1998/027335A1 |
The present invention pertains to a seam test for fuel injection pumps comprising a pump casing accommodated in the engine case, whereby an outlet (44) from the fuel injection pump, which opens out into an annular space (23) divided by s...
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WO/1998/025016A1 |
An apparatus and methods are provided for sensing movement of a fuel injector valve of a fuel injection system. The apparatus preferably includes a fuel pump for pumping fuel to flow to a combustion chamber of an engine and a first valve...
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WO/1998/024014A1 |
The present invention pertains to a method and a device for examining and/or adjusting valves, especially injector valves in an internal combustion engine. The valve is activated by means of an agreed control signal in order for a signal...
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WO/1998/019148A1 |
An apparatus for determining the spatial and temporal distribution and flow rate characteristics of fluid discharged from an injection nozzle (22) includes a plurality of pressure sensors (28) symmetrically disposed in a spatial array (2...
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WO/1997/044573A1 |
A method and system implementation of a fail-safe algorithm utilizes the engine controller of a fuel-injected vehicle, and detects leakage in the high-pressure portion of the fuel delivery system. A control volume is defined to include t...
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WO/1997/026093A1 |
Disclosed is an apparatus (10) for cleaning fuel injectors (44) used for injecting fuel (36) into an internal combustion engine (16). The apparatus (10) comprises a first member (12) for connecting a source of cleaning fluid (8) to a fir...
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WO/1997/023726A1 |
An ultrasonic apparatus and a method for injecting a pressurized liquid fuel by applying ultrasonic energy to a portion of the pressurized liquid fuel. The apparatus (100) includes a die housing (102) which defines a chamber (104) adapte...
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WO/1997/023717A1 |
A method for retaining and recalling technical data associated with a solenoid-operated fuel injector (10) improves engine emissions. Each fuel injector is tested to generate technical data specifications relating to the fuel injector. T...
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WO/1997/020136A1 |
A method for retaining and recalling technical data associated with a solenoid-operated fuel injector (10) improves engine emissions. Each fuel injector is tested to generate technical data specifications relating to the fuel injector. T...
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WO/1997/017539A1 |
A fuel injection valve for internal combustion engines with a valve body (1) with at least indirect provision for a valve seat (17) at its combustion chamber end and a sprung valve diaphragm (19) forming a valve member, the edge of which...
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WO/1997/010423A1 |
Described is a method of operating a fuel-injection device, and a fuel-injection device suitable for operation by this method, the fuel being fed in measurable amounts under high pressure to a high-pressure fuel reservoir (1) whose press...
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WO/1996/038664A1 |
The description relates to a device for detecting a leak in a fuel supply system in an internal combustion engine and especially a diesel engine, in which fuel is supplied to the injection valves at high pressure. The fuel pressure is co...
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