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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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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,...
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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...
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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...
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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...
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7197950 |
System for temperature-controlled testing of hydraulically actuated devices
A temperature controlled hydraulic fluid supply circuit ( 12 ) includes a first hydraulic fluid reservoir ( 18 ), that has an initial hydraulic fluid ( 20 ), and a temperature controlled housing (...
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7174773 |
Leak-testing technique for differential pressure sensor array
A leak-testing technique and apparatus for differential pressure sensor arrays is provided. A reference pressure sensor array is provided, wherein a seal is disposed between the reference pressure...
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7168302 |
Diagnostic device of evaporated fuel processing system and the method thereof
An inside of an evaporated fuel processing system including a fuel tank is closed after changing an internal pressure of the evaporated fuel processing system to a target pressure value. After the...
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7165442 |
Method of detecting a water leak in a locomotive
Disclosed herein are methods for detecting a water leak in a locomotive engine cooling system comprising numerous components, each being a potential source of leakage of water. The method typically...
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7162914 |
Method and control unit for function diagnosis of a fuel-tank venting valve of a fuel tank system in a motor vehicle in particular
In a method for testing the functional reliability of a fuel-tank venting valve which is provided in a tank system of a motor vehicle in particular, is connected to an intake manifold and is...
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7146849 |
Leakage drain
A leakage drain is used to provide an indication that leakage of a fluid has occurred within an engine. Previously, such leakage was detected by visual inspection of a retained drop at the outlet...
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7140235 |
Leak detection system for a vehicle fuel tank
A leak detection system for a vehicle fuel tank includes a sensor that is responsive to a pressure within the fuel tank and that generates a pressure signal based thereon. A control module...
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7137288 |
Fuel vapor leak check module
A fuel vapor leakage check module has a canister port which is provided so that the port can be opened to the air and is connected to the interior of a fuel tank through a canister for absorbing...
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7137293 |
Canister provided with a leak detection valve for treating evaporated fuel
A canister has: a canister body including an adsorbent case which is provided with an adsorption chamber filled with an adsorbent and a fuel steam introduction port, a purge port and an air...
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7135981 |
Fuel level variation detector for marine vehicle
A signaling device for a marine vehicle having a fuel tank, a fuel level value detected in the fuel tank, and a blower to evacuate fuel fumes. The signaling device comprises: a fuel level variation...
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7127937 |
Method for leak detection in gas feeding systems with redundant valves
A method for detecting leaks in a fuel cell system that includes a hydrogen storage tank, a primary shut-off valve and a secondary shut-off valve in a supply line. At shut-down, the primary...
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7117729 |
Diagnosis apparatus for fuel vapor purge system and method thereof
In a fuel vapor purge system, a diagnosis section inclusive of a fuel tank is pressurized from the generation of fuel vapor in the fuel tank has been finished after an operation of an engine was...
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7114372 |
Fuel vapor leak check module
A fuel vapor leak check module has a pump discharging an air through an outlet. When the fuel vapor check module is mounted on a vehicle, an outlet of the pump is opened downwardly in the gravity...
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7111498 |
Radiator inlet adapter
An inlet adapter includes a top portion threadingly engageable to a body portion, an expandable portion disposed adjacent the body portion, and a bolt threadingly engageable to the top portion, the...
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7107827 |
Fuel vapor leak check module
A fuel vapor leak check module has a pressure sensor and a pump driven by a brushless motor. The pressure sensor is disposed at a place opposite to the inlet. A sensor room in which the pressure...
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