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WO/2000/022404A2 |
A new method for diagnosing and identifying misfiring cylinders in an internal combustion engine is disclosed. A knowledge of the system dynamic model, system boundary conditions, and measured crankshaft torsional response are used to ch...
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WO/2000/022403A1 |
Method and device for use in connection with tests in motor vehicles, where the result of each test is received when certain conditions prevail, and where a central processing unit in the vehicle makes a decision whether the conditions p...
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WO/2000/020833A1 |
The invention relates to a method and an arrangement for evaluating combustion processes in an internal combustion engine, using a model which takes the time-variant transmission between pressure and structure-borne noise as a basis for ...
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WO/2000/017620A1 |
A vehicle diagnostics interface apparatus (1), for interfacing with a vehicle diagnostics unit having one or more vehicle fault indicator lights (2), comprises: a sensing device (3) for receiving light from the fault indicator light (2) ...
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WO/2000/017496A2 |
A system and method for obtaining engine diagnostic and prognostic information utilizing current, time and crank position data obtained from the starter motor during the starting of an engine and represented as a starter motor (150) curr...
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WO/2000/012992A1 |
A method and apparatus for automotive testing comprises a base station and at least two handsets adapted to provide a testing function in at least two corresponding technically distinct areas. Embodiments employ Kelvin connectors and/or ...
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WO/2000/006987A1 |
A method and system of misfire determination includes establishing an acceleration misfire threshold and an acceleration sub-misfire threshold. Then incremental engine position is sensed and a series of acceleration data-points are deriv...
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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/1999/064737A1 |
The invention relates to a method for detecting misfire in a piston combustion engine with electromagnetic valve gears which can be variably controlled by means of an electronic engine control that also performs load-dependent control du...
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WO/1999/063318A1 |
An arrangement for testing engines for vehicles and other drive train assemblies employs magnetic clamping to achieve fixation of the rotatory drive train assembly to a drive arrangement. When the rotatory drive train assembly is a vehic...
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WO/1999/062147A1 |
In accordance with the present invention, an aircraft instrumentation interface (10) for use with at least one electrically conductive mechanical key (12) disposed in an interface connector (14) and has an orientation specific to a parti...
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WO/1999/054703A2 |
The invention relates to an acoustic diagnostic system (D) for carrying out quality control, especially automatic quality control, of test objects (1), especially engines, ceramics, etc. The system comprises sensor technology (2), especi...
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WO/1999/054702A1 |
The invention relates to a system (8) and a method for configuring and/or parameterizing a diagnostic device (4) for objects (3) that are to be tested. The system consists of a first data object (1) with a set of technological test objec...
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WO1999028603B1 |
The invention relates primarily to the monitoring of emissions by motor vehicles, but also to those generated by ships, aircraft and diesel locomotives. The monitoring system can be built into new motor vehicles by the manufacturer or, i...
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WO/1999/044028A1 |
A process for detecting a misfire in one or more cylinders (3, 3') of an internal combustion engine, including the following operative steps: sampling the exhaust gas pressure values during at least one engine cycle, the sampling frequen...
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WO/1999/040408A1 |
In order to diagnose coupled piezo-mechanical systems, methods are used which utilise the electric characteristic curves of the piezo-element (11) contained in the piezo-mechanical systems. These electric characteristic curves contain in...
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WO/1999/035480A1 |
An on-board vehicle emissions testing system includes an instrument module adapted to be detachably connected to the exhaust pipe of a vehicle to provide for flow of exhaust gas therethrough. The instrument module includes a differential...
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WO/1999/031478A1 |
A machine lubrication system monitor (11) collects lubricant pressure (30), flow rate (22), and temperature (26) information and calculates as a function thereof a substantially constant magnitude signal representing normal machine opera...
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WO/1999/026050A1 |
A life estimation device which numerically measures the damage to a machine such as an engine accurately to estimate the life of the machine accurately without requiring skill. A load map (B) of the two-dimensional distribution of the op...
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WO/1999/022216A1 |
The present invention relates to the field of engine construction and may be used in the conception and manufacture of parts for internal combustion engines. The purpose of this invention is to optimise the diametrical gaps between the f...
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WO/1999/020993A1 |
A velocity adaptive method for testing the control of dynamic devices of a system having a position schedule influenced by a dynamic factor is disclosed. The method includes the steps of introducing a step into the position schedule and ...
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WO/1999/021120A1 |
A method and apparatus for communicating between a host and a motor vehicle, the motor vehicle including an on board computer system having a bus for communicating with a plurality of motor vehicle systems. The apparatus includes an elec...
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WO/1999/021129A1 |
A method and apparatus for communicating between a host and a motor vehicle, the motor vehicle including an on board computer system having a bus (15) for communicating with a plurality of motor vehicle systems. The apparatus includes an...
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WO/1999/019210A1 |
An aircraft engine vibration analysis system (10) with at least one vibration sensor (12) proximate the aircraft engine (14) and comprising a vibration analysis module (16). The module (16) is provided with a multiple pin input port (18)...
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WO/1999/015770A1 |
A process is disclosed for diagnosing internal combustion engines by measuring variables which represent the load of the internal combustion engine. At least one limit value is associated to the individual variables. When the at least on...
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WO/1999/015872A2 |
The invention relates to a method for evaluating the march of pressure in the combustion chamber of an internal combustion engine, wherein the output signal of at least one cylinder pressure sensor and a crankshaft angle sensor is evalua...
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WO/1999/015873A1 |
In a process for determining relevant variables which represent the cylinder pressure in the cylinders of an internal combustion engine, the relevant variables are derived from another measured variable and the other measured variable is...
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WO/1999/013310A1 |
The invention concerns a method for detecting an abnormal disturbance of an internal combustion engine torque and suspending the functioning of a system diagnosing combustion misfiring, operating by analysis of values (Cg,n,i) of a quant...
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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/1999/010728A2 |
The invention relates to a device for analysing the most important environmentally relevant substances such as CO,HC and NO in exhaust fumes from motor vehicles, based the principle of IR gas absorption. Measuring signals and a reference...
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WO/1998/059239A1 |
The invention concerns a device comprising first means measuring (DB) data concerning the instantaneous fuel mass consumed by the vehicle, second means measuring (AN1, AN2) the instantaneous concentration of said agent in the exhaust gas...
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WO/1998/059230A1 |
The invention relates to a diagnostic module for testing the tightness of a container, specially in a tank ventilation system of a motor vehicle, which has a reference leak (15) tuned to a permissible container leak and which can be cros...
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WO/1998/053198A1 |
The invention relates to a method for identifying knocking combustion in an internal combustion engine with an alternating current ignition system, wherein the duration of the combustion period of the ignition spark and the ignition ener...
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WO/1998/044250A1 |
The invention relates to a device for determining the volume of air entering the cylinder of an internal combustion engine with a supercharger, according to values such as speed, air flow rate in the induction pipe, throttle valve contro...
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WO/1998/044251A1 |
A diagnostic system (10) in an engine management system is provided for generating a diagnostic trouble code (DTC) to indicate the operational status of a component or a sub-system. The diagnostic system includes a diagnostic function mo...
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WO/1998/043061A1 |
Method and apparatus (1) for separating, by means of a probe, a partial flow from a flow of gases coming from an exhaust pipe (8) of, for instance, an engine such as a diesel engine for a vehicle (9), the exhaust pipe being connected, by...
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WO/1998/040716A1 |
A method and device for examining in cycles a vehicle about a plurality of diagnosis items including diagnosis items which utilize forced operation signals. A forced operation signal supply means (550) supplies a forced operation signal ...
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WO/1998/036257A1 |
The invention concerns a device comprising means (4, 5) for detecting anomalies in the dynamic functioning of an engine (1) induced by misfiring and means for inhibiting (6, 10�2?, 13) these detecting means sensitive to forces external...
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WO/1998/036280A1 |
The invention concerns a sensor comprising a) a cylindrical base (1) formed by an axial shaft (2) projecting from a ring-shaped collar (3), both traversed by an axial bore (4); b) a washer (6) made of piezoelectric material passing on th...
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WO/1998/029718A1 |
The invention relates to a process for calculating the torque of an internal combustion engine with electronic injection and comprising a cogged target with an indexation reference, rotating before a fixed sensor. The process consists in...
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WO/1998/025124A1 |
Method and apparatus for inspecting a spark plug as installed in an engine, for an abnormal size of a discharge gap and cracking of porcelain, based on a shape parameter value Sn ( = Vn/Tn) calculated from a voltage parameter value Vn wh...
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WO/1998/023938A1 |
The present invention relates to a quality control system for testing devices, such as mechanical devices with moving parts, such as electro motors, comprising a fixture adapted to hold and operationally engage with the device, at least ...
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WO/1998/022789A1 |
Disclosed is a housing having a testing apparatus or an indicator and control board of a testing apparatus for on-board diagnosis in the cockpit area of a motor vehicle, wherein the housing (1) comprises a fastening device to detachably ...
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WO/1998/017989A2 |
A crankshaft based engine diagnostic system includes a neuroprocessor for performing the required computations for detecting engine misfires on board the vehicle in real time and in a cost effective manner. The neuroprocessor achieves co...
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WO/1998/011416A1 |
The invention concerns a method of determining misfiring in an internal combustion engine comprising a plurality of cylinders. According to the invention, for at least one cylinder of the internal combustion engine at least two successiv...
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WO/1998/010300A1 |
A process is disclosed for inspecting and if required adjusting to individual system elements the components of a system in a motor vehicle. The system has at least a software-driven controller that can be connected to a control station ...
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WO/1998/009067A2 |
This invention concerns a diagnostic device for monitoring an exhaust gas return system which has elements for determining a diagnostic value (EGR_VER, EGR_DIF) of the exhaust gas return system without influencing the operation of the in...
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WO/1998/005936A1 |
A method for detecting a misfire in at least one truck or motor vehicle internal combustion engine cylinder by analysing the values (Cg, n, i) of a quantity (Cg) characteristic of combustion and generated by observing the rotation of the...
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WO/1998/004990A1 |
A modified trimmed mean filtering method and apparatus for a misfire detection includes acquiring a time-continuous series of acceleration data samples (601) representative of acceleration behavior of a reciprocating engine. And, providi...
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WO/1998/003846A1 |
A method of testing the assembled state of an internal combustion engine and quickly and accurately judging whether there is at least one fault with the assembling of the engine. While an exhaust-valve side space (100) is closed and a cr...
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