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WO/1998/001728A1 |
Device for collecting analogue measurement signals for the acoustic diagnosis of test pieces. Acoustic sensors (13, 14) are used to record analogue measurement signals (11, 12) from the test piece (19, 20). A computer (1) is equipped wit...
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WO/1997/049978A1 |
A computerized method and system are provided for determining air/fuel ratio of an engine's combustion process from its exhaust emissions wherein alternative methods for calculating the amount of water in the exhaust emissions are availa...
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WO/1997/049977A1 |
the present invention relates to a model-based fault detection system and method for monitoring and predicting maintenance requirements of electric motors. Since the method and system of the present invention is software based and utiliz...
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WO/1997/048894A1 |
A method for detection of misfiring of an internal combustion engine (1), wherein the torque of the internal combustion engine is measured with the aid of a torque sensor (2) mounted on the crankshaft (3) of the internal combustion engin...
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WO/1997/047875A1 |
The invention relates to a method for the generation of a low tension for the purpose of detecting an ion current in the spark gap of an internal combustion engine. The tension is generated by a controllable ignition magneto (5) arranged...
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WO/1997/040356A1 |
This invention concerns a device for recognizing knock and controlling a combustion engine in which the output signals of knock sensors are first sent to a preprocessing stage for signals (14) which extracts characteristic features from ...
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WO/1997/039323A1 |
The invention features a method according to which a) for each combustion phase of the air-fuel mixture an observation window defined by predetermined angular positions on the crankshaft is set; b) in each window a series of time deviati...
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WO/1997/036097A1 |
By picking up combustion noises in the individual cylinders with the aid of structural noise sensors and subsequently checking whether or not the sensor signals exceed threshold values specific to each cylinder within or outside establis...
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WO/1997/027461A1 |
A misfire detection system and method measures fluctuations of air charge ingested into an engine (303) preferably as fluctuations of the engine's intake air pressure or as fluctuations of the mass air flow. A misfire indication (337) is...
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WO/1997/027400A1 |
The invention relates to a measuring circuit for sensing ionisation within a combustion chamber of an engine. The measuring circuit is arranged in the grounded end of the secondary winding (5) of an ignition coil (2), and includes a volt...
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WO/1997/026522A1 |
The invention concerns a method of controlling ignition in a multicylinder internal combustion engine, the control variables being determined with reference to the parameters detected by sensors and misfiring being monitored as a functio...
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WO/1997/022786A2 |
Running instability values which are proportional to variations in the angular speed of the crankshaft are used to determine interval values from the average of the instability values relating to consecutive combustion cycles by comparis...
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WO/1997/020195A2 |
A misfire detection process based on the crankshaft speed of rotation is disclosed. An unsteady running value is derived from measured cylinder segment times and subsequent correction of mechanical teeth defects. By a cylinder-selective ...
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WO/1997/019334A1 |
A method for detrending engine positional data includes acquiring positional encoder data over a plurality of consecutive engine revolutions as the engine is decelerating. Then, a trend (207) in the acquired positional encoder data consi...
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WO/1997/013064A2 |
A diagnostic system (10) particularly though not exclusively for use in an engine management system is provided for generating a diagnostic trouble code (DTC) to indicate the operational status of a component or sub-system which is being...
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WO/1997/011345A1 |
The proposal is for a process for detecting misfiring on the basis of the time cycle of the rotary movement of a sensor wheel coupled to the crankshaft of an internal combustion engine, in which the segment times at which predetermined s...
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WO/1997/009567A1 |
A cylinder inner pressure detector for diesel engines, having a simple construction and a high operation efficiency and capable of saving a space and detecting the inner pressure of a cylinder with a high accuracy; and a method of using ...
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WO/1997/007386A2 |
The invention relates to a method of and apparatus for determining the clearance between wear surfaces of a reciprocating piston engine and the surrounding cylindrical bore of the engine block, without need for physical contact with the ...
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WO/1997/004296A1 |
A method and an apparatus (PT) for individually testing combustion engines (M) particularly designed for motor vehicles and assembled on a production line (10) consisting of a series of work stations (P1-PN). The method comprises a step ...
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WO/1996/042003A1 |
The proposal is for a process for detecting misfiring im multi-cylinder internal combustion engines in which a value is provided for the uneven running of individual cylinders of the engine and compared with a predetermined reference, wh...
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WO/1996/042002A1 |
A method comprising the steps of sensing the movement of each tooth (14, 16) of an engine flywheel past a sensor (22); measuring (30) the passage time di of each tooth; forming a measurement horizon extending beyond both ends of the angu...
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WO/1996/033395A1 |
A user friendly engine delivery system (10) is provided which employs a wheeled engine pallet assembly (12) for transferring a dressed engine (18) to a dynamometer room where the engine will be subsequently tested. A set of guide rails (...
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WO/1996/031695A1 |
A method for carrying out an ionic current measurement in an internal combustion engine using a lean fuel mixture which requires an increased burning duration, in which method a combustion start/a failed combustion start is detected, aft...
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WO/1996/030736A1 |
An exhaust gas testing device (1), in particular for motor vehicles, has an exhaust gas measurement unit (5) for measuring at least one exhaust gas component. The exhaust gas measurement unit (5) may be connected to a measurement probe (...
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WO/1996/030737A1 |
A misfire detection method and apparatus includes measurement of combustion induced torque in an internal combustion engine and provision of time-ordered first, second, and third acceleration data samples dependent on torque. A misfire i...
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WO/1996/024106A1 |
A method and apparatus for adaptive profile correction for rotating position encoders in reciprocating engines measures a raw engine speed derived from a rotating position encoder (107) driven by a reciprocating engine. A first corrected...
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WO/1996/013014A1 |
A parametric emissions monitoring system (15) for monitoring stationary engine/compressor units (50, 52) coupled to a pipeline provides, in a reciprocating embodiment, reliable and accurate determinations of emission levels for NOx, CO, ...
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WO/1996/012887A1 |
The proposal is for a process for monitoring the running of an internal combustion engine to detect misfiring in an engine with double sparking coils. It includes a process for monitoring the spark combustion voltage and/or duration on t...
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WO/1996/006337A1 |
A dynamometer comprises means to mechanically couple a hydraulic pump to the engine output, means indicating the rotational speed of the engine output, means indicating the torque and/or power of the engine output, valve means for contro...
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WO/1996/005418A1 |
The device automatically determines whether a load is being applied to the engine, and outputs a change signal that is used to change one or more engine operating parameters accordingly, such as engine speed, engine timing, or fuel flow....
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WO/1996/004539A1 |
According to the invention, gas torque (Cg) is determined for each cylinder combustion, engine speed (N) and air admission manifold pressure are measured during the corresponding prior admission phase, a reference torque (Cref), which is...
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WO/1996/003706A1 |
An apparatus, and a corresponding method, for determining misfire in a reciprocating engine (201) operates on a selectable quantity of discrete sampled acceleration signals (217) that are indicative of acceleration behavior of the recipr...
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WO/1996/003630A1 |
An acceleration based misfire detection system with improved signal fidelity comprises a measurement device (421, 423, 425, 427) for determining an operating condition of the powertrain (401). The operating condition can include engine s...
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WO/1996/002737A1 |
In order to detect a deviation from the current operating state (42) in the running of such a turbine plant (1) and forecast the reaction of the turbine plant (1) to changing boundary conditions, according to the invention, when an opera...
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WO/1996/001986A1 |
An engine misfire detection system (30) and method for successfully detecting and identifying misfiring engine cylinders over varying engine cycle rates and under varying engine load conditions in real time are embodied in a manifold abs...
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WO/1996/001415A1 |
A combustion pressure measuring system for a multi-cylinder internal combustion engine comprises a plenum chamber (26, 30), pressure tappings (24) connecting each of a plurality of combustion chambers (12) of the engine to the plenum cha...
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WO/1996/000943A1 |
A method and apparatus are disclosed for monitoring similar machine components loaded in parallel to produce diagnostic trend information used to predict component degradation or failure. Split exhaust manifolds (18, 20) are each provide...
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WO/1995/033983A1 |
An improved fiberoptic pressure sensing system (8) is disclosed by tapering the tip end (14) of an optical fiber (12) or alternatively, by tapering or bundling a fiber or group of fibers (98) within a connector (92). By selectively-joini...
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WO/1995/028560A1 |
The description relates to a device for detecting a pulsating quantity, especially the mass of air fed to an internal combustion engine, in which the output signal of the sensor which detects the pulsating quantity is influenced in a fil...
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WO/1995/027848A1 |
A method for sensing faulty combustion in an internal combustion engine by calculating, for each cylinder, a critical parameter ('SIGMA') representing instantaneous engine speed changes on the basis of a linear combination of time interv...
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WO/1995/023284A1 |
A device for detecting a vapourising rate of fuel to make appropriate volume adjustments for air-fuel ratio feedback control. When air-fuel ratio feedback control is started just after the start of an engine (S4), the temperature of exha...
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WO/1995/023285A1 |
A device for detecting the vapourising rate of fuel used just after the start of an engine so as to make appropriate volume adjustments for air-fuel ratio control. During a volume adjustment after the start of an engine (S4), the volume ...
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WO/1995/021384A1 |
An accelerometric sensor (1) for measuring pinking in an internal combustion engine, consisting of a base (10) in the form of a sleeve (11) with a flange (12) extending therefrom and supporting at least one stacked piezoelectric ring (2)...
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WO/1995/018953A1 |
This instrument comprises a sensor unit (2) having displacement measuring means which are detachably arranged between the crank arms (1a) of the crank shaft (1) so to measure the displacement of the intervals D, rotational angle measurin...
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WO/1995/018364A1 |
An apparatus and method (10) is provided for determining and recording the life and run values of a gas turbine engine (12). A starter drop out sensor (24) and a turbine inlet temperature sensor (20) delivers a respective drop out and tu...
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WO/1995/017592A1 |
A combustion control apparatus for a lean-burn engine is mounted on an automobile, etc., and is directed to make reliable combustion control in consideration of probable and statistic properties of combustion fluctuation. The apparatus i...
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WO/1995/016856A1 |
The present invention aims at improving a misfire detecting accuracy by making a detector learn a misfire level constituting a misfire judgement standard. An indicated mean effective pressure is calculated by integrating an inner pressur...
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WO/1995/016196A1 |
The invention proposes a process for determining the combustion point in the combustion chamber of an internal combustion engine so as to establish a parameter for influencing the combustion point. Thus, combustion chamber pressure and c...
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WO/1995/012063A1 |
An electronic counting circuit for the timed measurement of a digital signal of any periodic signal form in which the digital signal consists of a series of grouped periodic events by means of which the time between the input of two even...
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WO/1995/011435A1 |
The measuring bench for automobile diagnosis is characterised in that it comprises a main element (1) having a central unit (3), measuring modules (31, 32, 33, 34) each having a measuring circuit (25, 26, 27, 28) for at least one measuri...
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