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8155917 Flow diagnosis apparatus for fuel vapor purge system  
A pressure sensor senses a pressure of a fuel vapor system at a fuel vapor passage. An electronic control unit executes a post-depressurization period flow diagnosis to determine whether the fuel...
8122758 Purge valve leak diagnostic systems and methods  
A leak diagnostic system for a vehicle comprises a tank pressure module and a leak diagnostic module. The tank pressure module selectively outputs first and second fuel tank pressures when an...
8096169 Seal section assembly mechanical face seal integrity verification tool  
A test device for testing the integrity of a seal has a clear t-shaped liquid reservoir with three ends. A guide adapter is connected to the first end of the liquid reservoir and extends axially...
8087285 Apparatus and method for a seal immersion test with aerated fluid  
A test apparatus for testing fluid seals within an aerated fluid includes a container and a fluid located within the container. A plurality of seal coupons are submerged within the fluid in the...
8074627 Automotive fuel system leak testing  
Systems and methods for performing leak testing on fuel system components in hybrid vehicles during engine-off operating conditions are disclosed. For example, a fuel tank may include a pressure...
8015858 Electric radiator cap pressure tester  
The present invention a portable universal electric radiator cap pressure tester, having a multiple of common radiator cap filler necks fixed on a dash board. The fixed filler necks simulate the...
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...
7945414 Method for detecting abnormality in fluid supply line using fluid control apparatus with pressure sensor  
A method for detecting abnormality in a fluid supply line is provided that uses a fluid control apparatus with a pressure sensor so that abnormality of malfunction and sheet leaks of a plurality of...
7937988 Method and device for checking for leakage in a fuel injection valve of an internal combustion engine  
In a method and a device for testing for leakage in a fuel injection valve of an internal combustion engine, a temperature quantity is determined that characterizes the temperature of at least a...
7882728 Dual anomaly judgment device for a fuel cell  
There is provided an anomaly judgment device that is capable of detecting an abnormal state of a system highly accurately and obtaining an accurate result. The anomaly judgment device may include a...
7878046 Evaporative emission system test apparatus and method of testing an evaporative emission system  
A test apparatus for an evaporative emission system includes a source of pressure (positive or negative), a sensor for sensing the pressure generated in the evaporative emission system, and an ECU...
7860670 Device and method for detecting a leak in a cylinder of an internal combustion engine  
A device for detecting a leak in a cylinder of an internal combustion engine, the internal combustion engine including a piston in the cylinder, the piston being attached to a crankshaft, includes...
7841229 Leak detecting apparatus  
Apparatus and method for use in testing the fluid tightness of closed vessels or fluid systems, such as found in the pressurized cooling system of an internal combustion engine and the fluid...
7707872 Method for testing a hydraulic manifold  
A manufacturing process, system, and method is described that facilitates the assembly and testing of a hydraulic manifold with integral closed loop pressure sensing and feedback.
7685867 Leak diagnostic apparatus for a vaporized fuel processing system  
A leak diagnostic apparatus for a vaporized fuel processing system that purges vaporized fuel in a fuel tank of a vehicle is disclosed. The leak diagnostic apparatus comprises a leak diagnostic...
7624624 Pump assembly and method for leak detection of fluid system  
A method of detecting a leak in a fluid system, which includes a switch that changes state according to pressure in the fluid system. The method includes changing pressure in the fluid system with...
7614283 Cooling system testing apparatus and methods  
This invention describes apparatus for and methods of testing cooling systems. The apparatus and method can be used for, among other things, pressurizing the cooling system either to a positive...
7594427 Rate-based monitoring for an engine system  
Rate based monitoring includes performing test cycles on a monitored system when predetermined conditions are met. Completion of a test cycle is determined by timing a period that is at least as...
7584651 Procedure to diagnose a leak in the fuel tank in a fuel tank ventilation system  
A method of diagnosing a fuel tank leak in a fuel tank ventilation system, comprising a fuel tank, an accumulator for fuel vapors and a fuel tank ventilation valve opening out into an intake...
7581433 Cylinder leak detector  
An apparatus and method for detecting cylinder leaks in an internal combustion engine includes a hose having an end configured for communication with a spark plug hole connecting to a cylinder to...
7562559 Fuel vapor detection system for vehicles  
An electric motor or generator is used to spin the vehicle's internal combustion engine while the engine is not running, in order to draw a vacuum within the vapor control system. Vacuum bleed off...
7562561 Intake air leak determination system and method  
An intake manifold air leak determination system and method for an internal combustion engine including an intake manifold fluidly connected to a plurality of cylinders of the engine and a...
7562560 Engine off vacuum decay method for increasing pass/fail threshold using NVLD  
A technique is provided for detecting leaks in a fuel system such as an automotive fuel system. The technique complements an on-board diagnostics evaporative leak monitor that uses natural vacuum...
7519508 Method and system for setting and analyzing tubing target pressures for tongs  
A target pressure value is determined during the learning mode. Subsequent pressure values are then compared to the target value. For example, a first connection is tightened in a conventional...
7484406 Abnormality determining apparatus of fuel vapor processing system  
An abnormality determining apparatus of a fuel vapor processing system is provided. The system includes a canister for temporarily reserves fuel vapor generated within a fuel tank and a fuel vapor...
7472582 Leak diagnosis system and leak diagnosis method  
An ECU drives a pump in a first stage at a first pumping capacity. The ECU drives the pump in a second stage after the first stage at a second pumping capacity, which is lower than the first...
7472583 Evaporated fuel leakage detector for use in automotive vehicle  
A detector for detecting evaporated fuel leakage from a fuel tank is connected to the fuel tank through a canister for absorbing evaporated fuel. When an engine is not in operation, air in the fuel...
7448257 Leak check apparatus for fuel vapor processing apparatus  
A leak check apparatus performs a leak check of a fuel vapor processing apparatus based on a change in a negative pressure in a purge line during leak down. The pressure change during leak down is...
7418856 Method for checking the gastightness of a motor vehicle tank ventilation system  
The invention relates to a method for checking the gastightness of a motor vehicle tank ventilation system consisting essentially of a fuel tank, an adsorption filter, a ventilation line with a...
7401494 Valve test apparatus and methods for testing a solenoid valve or a venturi valve  
A valve test apparatus, a solenoid valve test method and a venturi valve test method are provided. The valve test apparatus may include a gas supply unit, a solenoid valve holding unit, a first...
7387014 Vacuum generator for vacuum-decay leak testing the evaporative emissions system of a motor vehicle  
A compact (e.g., hand held) vacuum generator having particular application for creating a vacuum within the evaporative emissions system (e.g., a gas tank) of a motor vehicle so that a vacuum-decay...
7383722 Fuel vapor treatment system with leak diagnosing  
A fuel vapor purge system is configured to execute a highly accurate leak diagnosis with respect to a fuel vapor leak. After the engine is stopped, the temperature of the fuel vapor rises...
7367219 Automatic control of leak test unit during testing and analysis of an engine  
A method and apparatus for developing a test for determining if an engine has oil seal leaks. The engine is charged with a predetermined pressure of air and monitored by a leak tester. A digital...
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...
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...
7360408 Method for determining a fuel pressure related fault and operating an internal combustion engine based on the fault  
The invention relates to a method for operating a combustion engine (1) comprising a fuel-driven heat engine (5), which permits a differentiation of faults during the supply of fuel. To this end,...
7350399 Leakage detecting device for evaporating fuel processing apparatus  
A leakage detecting device is connected to an evaporating fuel processing apparatus to detect leakage of evaporating fuel in a ventilation apparatus that includes an electric pump, a fuel tank, and...
7350512 Method of validating a diagnostic purge valve leak detection test  
A system and method for evaluating the integrity of a leak detection test for a purge valve of a fuel system in a vehicle reduces or eliminates false failures. The method is executed on an engine...
7347194 Leak diagnosis device  
Concentration measurement is performed multiple times from a period in which pressure in a purge device increases due to generation of fuel vapor after operation of an engine is stopped. A...
7347087 Engine oil leak test system and method  
A system and method for testing partially assembled engines for possible oil leaks. The system includes engine pressurizing devices that are automatically controlled by a controller according to a...
7347082 Method and apparatus for testing vehicle fuel system integrity  
A method and apparatus for measuring leakage of a vehicle fuel system includes providing an apparatus having a gas source, a pressure meter and a reference orifice and connecting the apparatus to...
7337652 Fuel system with leak location diagnostic features and component for same  
A leak diagnostic strategy for an engine equipped with a high pressure common rail fuel system includes a plurality of separate leak lines. Each of the leak lines is constructed and positioned to...
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...
7228851 Canister having absorbent and internal purge pump  
A canister includes a casing that has a tank port connected to a fuel tank, an atmospheric port connected to an atmospheric passage communicating with atmosphere, and a purge port connected to an...
7222742 Cap structure for a radiator used in vehicle  
A cap structure for a radiator used in vehicle is disclosed. The cap includes a main cap body, a connector shaft, and a leak-seal seat. The main cap body includes a metallic cap body and a...
7219535 Leakage diagnosis apparatus for fuel vapor purge system and method thereof  
In a fuel vapor purge system, a blocked diagnosis zone is pressurized by an air pump, a pressure in the diagnosis zone at the time when the diagnosis zone is pressurized, and an occurrence of...
7210363 Scan testable filter housing assembly for exhaust applications  
A filter housing assembly for exhaust applications and method of testing the same is provided. In one embodiment, the filter housing assembly includes a housing having a filter receiving aperture,...
7210338 Valve testing device having integrated purge circuit and method of valve testing  
A valve testing device and method for determining whether a fluid control valve, such as an automatic transmission valve, is operating acceptably. The device and method of the present invention...
7207209 Fuel evaporation gas leakage detecting system and method of detecting fuel evaporation gas leakage  
A leak detecting system detects fuel gas leakage of a fuel tank. The detecting system includes a fuel pump, a jet pump, and a bent valve, which are disposed in the fuel tank. A fuel flow path...
7204237 Evaporative system leak detection upon refueling  
A loose or missing fuel cap detection method for an evaporative emission control system of an automotive vehicle detects a loose or missing fuel cap based in part on whether fuel level changed. The...
Matches 1 - 50 out of 284 1 2 3 4 5 6 >