Browse Topic: Leak tests
This specification provides requirements and procedures for gas-pressure leak testing of parts
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts
This SAE Standard provides the testing and functional requirements guidance necessary for a leak detection device that uses any non-A/C refrigerant tracer gas, such as helium or a nitrogen-hydrogen blend, to provide functional performance equivalent to a refrigerant electronic leak detector. It explains how a non-refrigerant leak detector’s calibration can be established to provide levels of detection equal to electronic leak detectors that meet SAE J2791 for R-134a and SAE J2913 for R-1234yf
Lithium-ion battery systems are an energy source for a variety of electric-vehicle applications due to their high energy density and low discharge rates. Battery packs, whether made of prismatic, cylindrical, or pouch cells, are cooled by common automotive thermal management systems
The “system emissions chart” contained herein is intended to serve as a means of estimating the annual refrigerant emission rate (grams per year) from new production A/C systems equipped with specified component technologies. It provides emission values for various component technologies that are currently available, and can be expanded as new technologies are commercialized. This document provides the information to develop an Excel file template “system emissions chart” for system emission analysis. The chart includes automotive compressor technologies for conventional mobile air conditioning systems, as well as those using semi-hermetic compressors. This standard can be considered a companion document to SAE J2763. SAE J2727 estimates system emissions, taking into account production assembly variation and accounts for components that are 100% helium leak tested prior to vehicle final assembly. The results from SAE J2064 are used to better represent permeation emissions from
This SAE Standard provides testing and functional requirements to meet specified minimum performance criteria for electronic probe-type leak detectors. So they will identify smaller refrigerant leaks when servicing all motor vehicle air conditioning systems, including those engineered with improved sealing and smaller refrigerant charges to address environmental concerns and increase system efficiency. This document does not address any safety issues concerning their design or use
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts
This standard provides the testing and functional requirements guidance necessary for a leak detection device that uses any non-A/C refrigerant tracer gas, such as helium or a nitrogen-hydrogen blend, to provide functional performance equivalent to a refrigerant electronic leak detector. It explains how a non- refrigerant leak detector’s calibration can be established to provide levels of detection equal to electronic leak detectors that meet SAE J2791 for R-134a and SAE J2913 for R-1234yf
In current competitive environment automobile industry is under heavy pressure to reduce time to market. First time right design is an important aspect to achieve the time and cost targets. CAE is a tool which helps designer to come up with first time right design. This also calls for high degree of confidence in CAE simulation results which can only be achieved by undertaking correlation exercises. Fuel tank is one of the important system in vehicle. At the validation stage leak test is carried out to find the leakage in the tank. This test is regulatory requirement which also ensures that the spot weld joineries have sufficient strength. Same test was mapped in CAE and high stress locations were identified. In test, strain gauging was done at the three selected locations. Paper highlights the test vs. CAE strain correlation and its finding. The effect of thinning is also discussed for the strain correlation of fuel tank
The “System Emissions Chart” contained herein is intended to serve as a means of estimating the annual refrigerant emission rate (grams per year) from new production A/C systems equipped with specified component technologies. It provides emission values for various component technologies that are currently available, and can be expanded as new technologies are commercialized. This document provides the information to develop an Excel file template “System Emissions Chart” for system emission analysis. The chart includes automotive compressor technologies for conventional mobile air conditioning systems as well as those using semi-hermetic compressors. This standard can be considered a companion document to SAE J2763 Test Procedure for Determining Refrigerant Emissions from Mobile Air Conditioning Systems. SAE J2727 estimates system emissions, taking into account production assembly variation and accounts for components that are 100% helium leak tested prior to vehicle final assembly
This SAE Standard provides testing and functional requirements to meet specified minimum performance criteria for electronic probe-type leak detectors. So they will identify smaller refrigerant leaks when servicing all motor vehicle air conditioning systems, including those engineered with improved sealing and smaller refrigerant charges to address environmental concerns and increase system efficiency. This document does not address any safety issues concerning their design or use
This standard provides the testing and functional requirements guidance necessary for a leak detection device that uses any non-A/C refrigerant tracer gas, such as helium or a nitrogen-hydrogen blend, to provide functional performance equivalent to a refrigerant electronic leak detector. It explains how a non- refrigerant leak detector’s calibration can be established to provide levels of detection equal to electronic leak detectors that meet SAE J2791 for R-134a and SAE J2913 for R-1234yf
Thin films and vacuum technology are used frequently throughout advanced, environmentally friendly automobile manufacturing. From automotive light-weighting of conventional ICE automobiles, to hybrid and EV manufacturing, thin films deposited in vacuum systems, vacuum heat-treating, and vacuum leak testing are a major part of automotive device, component and sub-assembly manufacturing. Starting with new applications of polycarbonate glazing by plasma coating, which provides lower CO₂ emissions, greater design freedom and cost reduction through parts consolidation. For high-strength, light-weight automotive steel stampings used in chassis and body parts, wear-resistant coatings are applied in vacuum systems to provide wear protection and to extend the stamping die lifetimes. Thin film vacuum equipment is also used for the manufacturing of: control circuits, film capacitors (EVs, PHEVs and HEVs), power ICs (hybrids), sensors (air bag, tire pressure, etc.), secondary batteries (EVs
The “System Emissions Chart” contained herein is intended to serve as a means of estimating the annual refrigerant emission rate (grams per year) from new production A/C systems equipped with specified component technologies. It provides emission values for various component technologies that are currently available, and can be expanded as new technologies are commercialized. This document provides the information to develop an Excel file template “System Emissions Chart” for system emission analysis. The chart includes automotive compressor technologies for conventional mobile air conditioning systems as well as those using semi-hermetic compressors. This standard can be considered a companion document to SAE J2763 Test Procedure for Determining Refrigerant Emissions from Mobile Air Conditioning Systems. SAE J2727 estimates system emissions, taking into account production assembly variation and accounts for components that are 100% helium leak tested prior to vehicle final assembly
O-rings are regularly utilized as a means of creating a seal between two components. Since the introduction of mini-concentric fuel pressure regulators, several issues have arisen related to assembly. In many cases, severe leaks are masked by lubricants used to aid in assembly. A lubricant is required which will not mask such leaks. The purpose of this study is to determine the impact on assembly between alcohol and oil based lubricants and to determine the optimum assembly parameters when using alcohol lubricants. Several variables were identified as being major contributors to the assembly process. A total of 6 variables were chosen to be examined as well as 2 noise factors. Each variable, or factor, was assigned several levels for this experiment. Several measurables were defined outputs from the experiment. To maximize the efficiency of testing, an orthogonal array was used to structure the experiment. An L18 orthogonal array was chosen composed of 72 trials. When conducting a
This SAE Standard applies to electronic probe-type leak detectors used to service motor vehicle passenger compartment air-conditioning systems. This document does not address any safety issues concerning their design or use
Determination of appropriate leak tightness specifications for production leak testing of fuel system components has challenged the automotive industry for many years. This process has become more complicated as hydrocarbon emission regulations have been lowered (US-EPA, CARB LEVII, Euro5, etc.). Application of the equivalent channel (EC) concept can significantly simplify the process of determining leak tightness specifications. This paper describes the test procedure and results of a hydrocarbon emission study designed to define a critical geometry (known as Equivalent Channel-EC) that will plug after exposure to gasoline, resulting in no HC emission due to leaks during Vehicle SHED (Sealed Housing for Evaporative Determination) tests. This critical geometry will stop any measurable hydrocarbon leakage after enough time has elapsed for the channel to plug. Micro-channels of several diameters and lengths were tested in a Micro-SHED at 40 degrees Celsius for 24 hours. SHED tests were
This SAE Standard provides testing and functional requirements to meet specified minimum performance criteria for electronic probe-type leak detectors. So they will identify smaller refrigerant leaks when servicing all motor vehicle air conditioning systems, including those engineered with improved sealing and smaller refrigerant charges to address environmental concerns and increase system efficiency. This document does not address any safety issues concerning their design or use
This SAE Standard applies to electronic probe-type leak detectors used to identify refrigerant leakage when servicing motor vehicle air conditioning systems. This document does not address any safety issues concerning their design or use. The purpose of this SAE Standard is to establish the minimum performance criteria for electronic probe-type leak detectors
This recommended practice covers a self-contained detection system which is capable of pressurizing a closed system up to 70 psig with halogen (tracer) gas and up to 3500 psig with nitrogen
Herschel is the fourth cornerstone mission in the European Space Agency (ESA) science programme. It will perform imaging photometry and spectroscopy in the far infrared and submillimetre part of the spectrum, covering the 57-670 µm wavelength range. This successor of the Infrared Space Observatory (ISO) is scheduled to be launched by an Ariane 5 in 2007. Once operational Herschel will offer a minimum of three years of routine observations. EADS-ASTRIUM, in charge of the Extended Payload Module, has involved AIR LIQUIDE in the design and manufacturing of major components of the spacecraft cryostat: the two Helium Tanks, all Thermal Links [1.6 K - 9 K], the Optical Bench Helium Cooling Loop, the three Thermal Shields and all the Helium System Tubing from the tanks to the Cryostat Vacuum Vessel. All these elements contribute to the final aim of the system to provide the required cold environment to the Herschel Focal Plane Units. This paper presents the items provided by AIR LIQUIDE, from
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts
This SAE Recommended Practice applies to the use of generally available electronic leak detection methods to service motor vehicle passenger compartment air-conditioning systems
As the use of electronic devices in automobiles increases, the reliability of such devices is becoming increasingly important. One possible failure is due to leakage resulted from imperfect hermetical seal in mircochips and microelectronic packages. This paper presents an optical technique referred to as shearography for rapid evaluation of hermetics seals. The proposed process of leaking testing is very fast and practical
This SAE Standard applies to electronic probe-type leak detectors used to service motor vehicle passenger compartment air-conditioning systems. This document does not address any safety issues concerning their design or use
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts
This SAE Recommended Practice applies to the use of generally available electronic leak detection methods to service motor vehicle passenger compartment air conditioning systems
This SAE Standard applies to electronic probe-type leak detectors used to service motor vehicle passenger compartment air conditioning systems. This document does not address any safety issues concerning their design or use
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts
This specification provides requirements and procedures for hydraulic-pressure leak testing of parts
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