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| Number | Title | Issue Date |
| 7963149 | Method and device for determining hydraulic leakage rate in liquid-conveying sections, in particular, injection valves of internal combustion engines A method and device for determining the hydraulic leakage rate of liquid-conveying parts, in particular injection valves for internal combustion engines, place the liquid-conveying part into a test body, and the liquid-conveying part is charged with a test liquid un... | 06/21/2011 |
| 7832256 | Method and apparatus for detecting the presence or absence of fluids in a pipeline A method and apparatus for detecting the presence or absence of an undesirable fluid, such as water, in a pipeline and for removing the undesirable fluid are disclosed. A detecting substance, for example, sugar, naphthalene or a pigmented solid is carried by a sweep... | 11/16/2010 |
| 7367220 | Engine oil leak test method with EGR valve leak offset A method for pressure testing an engine to detect possible oil seal leaks. The engine is charged with a predetermined pressure while air pressure is also applied to an exhaust gas recirculation (EGR) valve intake port to offset leakage inherent in the EGR valve. The... | 05/06/2008 |
| 7360401 | Leak detector for evaporated fuel An evaporated fuel leak detector detects leakage of an evaporated fuel generated in a fuel tank. The detector includes: a differential pressure valve, a pump for sucking a detection port side to reduce pressure on a fuel tank side, and pressure detection means for d... | 04/22/2008 |
| 7231813 | Leak detector for evaporated fuel An evaporated fuel leak detector detects leakage of an evaporated fuel generated in a fuel tank. The detector includes: a differential pressure valve, a pump for sucking a detection port side to reduce pressure on a fuel tank side, and pressure detection means for d... | 06/19/2007 |
| 7204132 | Method for determining valve degradation A system and method for determining valve degradation is presented. According to the method, valve timing can be adjusted in a number of ways to improve the possibility of detecting a degraded valve. ... | 04/17/2007 |
| 7165446 | Failure diagnostic apparatus for fuel vapor purge system and fuel vapor purge apparatus and combustion engine having failure diagnostic apparatus After a reference pressure using a reference hole is measured, a pressure in an evaporation path is measured. An ECU conducts failure diagnosis using, as a determination pressure for diagnosing presence/absence of a failure, a value obtained by correcting the refere... | 01/23/2007 |
| 7120565 | Method and apparatus for determining figure The present invention aims to provide apparatus and method for determining non-circular figure to drill boring holes having a regular N-polygonal cross sections while retaining the advantage of the turning operation. For boring a boring hole (H) with a cross-section... | 10/10/2006 |
| 7104121 | Valve seat gauging system A gauging system for checking a valve seat and a valve guide of an engine part, the system comprising: a gauge support mountable to a stable platform; a gauge which, in use, depends from the gauge support and has a... | 09/12/2006 |
| 7080551 | Fluid volume measuring apparatus with bubble in fluid A fluid volume measuring apparatus for measuring volume of fluid flowing out of a measured object includes a passage member that defines a measurement passage. The measurement passage is filled with fluid, which is capable of moving in the measurement passage in acc... | 07/25/2006 |
| 7073485 | Engine management An engine management system for an internal combustion engine, which has at least one cylinder pressure sensor and at least one engine actuator, includes a data processor arranged to receive and process cylinder pressure data from the cylinder pressure sensor and th... | 07/11/2006 |
| 6968733 | Digital compression gauge There is provided a compression gauge assembly for diagnosing pressure variances of an engine cylinder(s). The gauge assembly comprises a gauge sensor in communication with the engine cylinder(s). The gauge sensor is operative to detect compression stroke pressures ... | 11/29/2005 |
| 6935156 | Characterization of process pressure sensor A pressure sensor of a process device, is characterized by applying a plurality of pressures to the process sensor. Outputs of the plurality of pressures are received. A compensation relationship is determined based upon the pressure sensor output. The characterizat... | 08/30/2005 |
| 6910369 | Apparatus for detecting compression top dead center of an engine An apparatus for detecting a compression top dead center phase includes an external driving portion for driving a crankshaft of an engine, a phase sensor for detecting a top dead center phase of the crankshaft, which corresponds to a top dead center position of a sp... | 06/28/2005 |
| 6857308 | Valve technology A fluid flow control valve is provided with means for detecting and quantifying valve seat leakage when the valve is in its closed position. Any fluid leaking past the seat flows through an orifice of known, fixed dimensions present downstream of the seat when the v... | 02/22/2005 |
| 6763703 | Method and device for determining leaks at the seal of a valve There is described herein a method and a device for determining leaks at the seal of a valve or a valve rod, in particular of a process valve so that an indication that the valve-rod seal needs changing can then be obtained in good time. In order to determine the le... | 07/20/2004 |
| 6714876 | Control system A control system for a gas sensor element capable of lessening the effect of variations in sensor properties among gas sensor elements as well as the effect of environmental factors, such as temperature and humidity, to thereby accurately detect variation in the con... | 03/30/2004 |
| 6679111 | Malfunction diagnostic apparatus for evaporated fuel purge system The present invention provides a malfunction diagnostic apparatus for an evaporated fuel purge system in an internal combustion engine, capable of detecting abnormalities such as looseness or clogging in the purge line between a purge valve and an engine ... | 01/20/2004 |
| 6530277 | Diagnostic system for a valve that can be actuated by a position controller via a drive A diagnostic system for a valve (2) that can be actuated by a position controller via a drive. The diagnostic system includes a device (14) provided for recording, storing, and evaluating, body sound spectra on the valve. In order to enable a valve to be ... | 03/11/2003 |
| 6516251 | Automated vehicle shutdown sequence The present invention provides a system for automatically shutting down a vehicle. The system includes a vehicle system for performing a vehicle function such as brakes for performing braking of the vehicle. A vehicle control system controls the vehicle s... | 02/04/2003 |
| 6463795 | Method for testing an internal combustion engine for assembly and/or manufacturing faults A method for testing an internal combustion engine for assembly and manufacturing faults. In methods of this type, the torque of an electric traction motor has hitherto been determined, specific torque values being an indication of faulty engines. So that... | 10/15/2002 |
| 6405419 | Engine valve and seat burnishing system An arrangement for exercising (or burnishing) the intake and exhaust valves in the cylinder head of an internal combustion engine employs a plurality of out-of-phase eccentric cams coupled to a source of rotatory motion. The eccentric cams engage with res... | 06/18/2002 |
| 6370944 | Fluid leak finder for a vehicle A fluid leak finder device for a vehicle for finding oil leaks preferably in an engine of a vehicle. The fluid leak finder device for a vehicle includes an air-regulating container having top, bottom, and side walls; and also includes a plurality of condu... | 04/16/2002 |
| 6279383 | Method and apparatus for detecting leakage A method of, and apparatus for, determining leakage in a valve or the like which is not dependent on bulk modulus of the fluid is described. The test apparatus includes a pressure transducer which measures the change in pressure along a length of pipe (XY... | 08/28/2001 |
| 6272904 | Driver controlled air system moisture removal and pre-trip inspection system An apparatus for operator controlled purging of the tanks of a pressurized air reservoir of a vehicle air system comprises an air actuated normally closed drain valve mounted to an underside of each tank, a source of pressurized air engaged to each drain ... | 08/14/2001 |
| 6257050 | Evaporative fuel leak diagnosing apparatus An evaporative fuel leak diagnosing apparatus for an internal combustion engine, which can detect a pressure of concern with high accuracy with a structure implemented inexpensively while ensuring high accuracy for the detection of fuel vapor. The apparat... | 07/10/2001 |
| 6050135 | Spark plug port compression cap The disclosed invention is an inexpensive, simple and reusable device to aid in setting the spark plug timing of an internal combustion engine by allowing one person to detect a piston's top dead center. In function, the detector is sealably inserted into... | 04/18/2000 |
| 5945593 | Method for selectively testing for leakage of combustion chambers of cylinders of internal combustion engines The invention relates to a method for selectively testing leakage of combustion chambers in cylinders of internal combustion chambers when the engine is operated with the combustion process suppressed. The internal combustion engine is provided with means... | 08/31/1999 |
| 5786531 | Compression ratio measurement Internal combustion engine cylinder compression ratio measurement is provided by applying a train of pressure pulses to an engine cylinder, measuring time rate of change in pressure within the cylinder and estimating a volume of air within the cylinder fr... | 07/28/1998 |
| 5756888 | Compression stroke indicator A compression stroke indicator including an indication mechanism adapted to signal a user upon the application of pressure thereto. Further provided is an elongated elastomeric hose connected at a first end thereof to the indication mechanism. Also includ... | 05/26/1998 |
| 5635630 | Leak detection assembly An assembly for testing an evaporative emission control system of an automotive vehicle which controls emission of volatile fuel vapors. The assembly is used to determine if a leak is present in a portion of the system which includes a vapor collection ca... | 06/03/1997 |
| 5585549 | Rapid life test system for engine cylinder block A system for hydrostatically testing a cylinder block for an internal combustion engine simulates the gas loads imposed upon the cylinder block when the engine is firing. The system includes an engine cylinder block having multiple cylinders, with pressur... | 12/17/1996 |
| 5569841 | Cylinder combustion gas leakage testing A leakage tester for identifying defective piston assemblies in a diesel engine includes an adapter fitting for connection to a compression relief valve port on a selected diesel engine cylinder, a fixed length of air conduit having a preselected inside d... | 10/29/1996 |
| 5533384 | Apparatus for inspecting an engine valve seat An apparatus for measuring the ovality, concentricity and runout of an engine valve seat which is comprised of a datum plate, an air gage head, a pot master, a compressed air source, a signal processing device, and a display unit. The compressed air sourc... | 07/09/1996 |
| 5531100 | Method of detecting a leaky exhaust valve The invention is directed to a method of checking the tightness of exhaust valves of an internal combustion engine with the aid of an apparatus. The apparatus includes a device for forming a value LU for the uneven running of the engine and a device for m... | 07/02/1996 |
| 5495749 | Leak detection assembly A leak detection assembly for an evaporative emission control system in an automotive vehicle including a fuel tank, a canister for collecting volatile fuel vapors from the fuel tank, a purge valve disposed between the canister and an intake manifold of a... | 03/05/1996 |
| 5417109 | Methods and apparatus for testing engines Methods and apparatus are disclosed for testing an internal combustion engine having one or more cylinders each of which has a reciprocable piston which defines a variable volume combustion chamber in communication with intake and exhaust ports that are o... | 05/23/1995 |
| 5404750 | Method for detecting leaky injection valves in an internal combustion engine The invention is directed to a method for detecting leaky injection valves for an internal combustion engine. The method applies for the start operation under pregiven conditions wherein all cylinders are ignited, even those where there is no injection. A... | 04/11/1995 |
| 5372031 | Device for vacuum testing of closed systems The vacuum tester has a housing which is small enough to be held in one hand in which is contained a small vacuum pump, an activator switch and a vacuum gauge. A non-return flap valve, or check valve, is disposed between the vacuum pump and the vacuum gau... | 12/13/1994 |
| 5365773 | Engine blowby measuring apparatus An apparatus for measuring gaseous blowby a piston of an operating internal combustion engine. The apparatus have a heating and filtering system which function to increase the accuracy of the resultant measurements. The orientation of the conduit, flow me... | 11/22/1994 |
