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R134a Refrigerant Charge Determination Test Method

The purpose of this document is to establish guidelines for determining the critical R134a refrigerant charge for off-road, self-propelled work machines as defined in SAE J1116 and Agricultural Tractors as defined in ANSI/ASAE S390. It will develop a minimum to maximum refrigerant charge range in which the HVAC system can maintain proper operation. Operating conditions and characteristics of the equipment will influence the optimum charge. Since these conditions and characteristics vary greatly from one application to another, careful consideration should be taken to determine the optimum R134a refrigerant charge for the HVAC system.

Electronic Transmission Controls

The evolution of the automotive transmission has changed rapidly in the last decade, partly due to the advantages of highly sophisticated electronic controls. This evolution has resulted in modern automatic transmissions that offer more control, stability, and convenience to the driver. Electronic Transmission Controls contains 68 technical papers from SAE and other international organizations written since 1995 on this rapidly growing area of automotive electronics. This book breaks down the topic into two sections. The section on Stepped Transmissions covers recent developments in regular and 4-wheel drive transmissions from major auto manufacturers including DaimlerChrysler, General Motors, Toyota, Honda, and Ford. Technology covered in this section includes: smooth shift control; automatic transmission efficiency; mechatronic systems; fuel saving technologies; shift control using information from vehicle navigation systems; and fuzzy logic control.

Top Speed Test Procedure for Electric Motorcycles

This SAE Recommended Practice incorporates a track-based test procedure that produces a representative value for vehicle top speed when operating on a level paved road with a fully charged battery.

Reliability Program Standard

This SAE standard establishes the requirement for suppliers to plan a reliability program that satisfies the following three requirements: a The supplier shall ascertain customer requirements b The supplier shall meet customer requirements c The supplier shall assure that customer requirements have been met

Concepts in Turbocharging for Improved Efficiency and Emissions Reduction

Legislative requirements to reduce CO2 emissions by 2020 have resulted in significant efforts by car manufacturers to explore various methods of pollution abatement. One of the most effective ways found so far is by shortening the cylinder stroke and downsizing the engine. This new engine then needs to be boosted, or turbocharged, to create the full and original load torque. Turbocharging has been and will continue to be a key component to the new technologies that will make a positive difference in the next-generation engines of years to come. Concepts in Turbocharging for Improved Efficiency and Emissions Reduction explores the many ways that turbocharging will deliver concrete results in meeting the new realities of sustainable, green transportation.

Low-Permeation Fuel Fill and Vent Tube

This SAE Standard covers the minimum requirements for a low-permeation tubing (100 g/m2·day or less) for use as a low pressure (14.5 kPa) liquid- or vapor-carrying component for use in gasoline or diesel fuel filler, vent, and vapor systems. The construction shall be designed to be functional over a temperature range of –40 °C to 100 °C for the T1 designation, or –40 °C to 125 °C for the T2 designation.

Circuit Breakers

This SAE Standard defines the test conditions, procedures, and performance requirements for circuit breakers in ratings up to and including 50 A. The document includes automatic reset, modified reset, and manually reset types of circuit breakers for 12 V and 24 V DC electrical systems. Some circuit breakers may have dual voltage ratings (AC and DC), however, this document evaluates DC performance only.

Measuring Properties of Li-Battery Electrolyte

This SAE RP provides a set of test methods and practices for the characterization of the properties of Li-battery electrolyte. It is not within the scope of this document to establish criteria for the test results, as this is usually established between the vendor and customer.

Brake Hydraulic Component Flow Rate Measurement for High Differential Pressure (>5 bar)

This recommended practice provides a method, test set-up, and test conditions for brake hydraulic component flow rate measurement for high differential pressure (>5 bar) flow conditions. It is intended for hydraulic brake components which affect the brake fluid flow characteristics in a hydraulic brake circuit, that are part of a circuit for which the flow characteristics are important to system operation, and that are exposed to high operating pressure differentials (in the 5 to 100 bar range). Typical applications may include measurement of flow through chassis controls valve bodies, orifices in the brake system such as in flow bolts, junction blocks, and master cylinders, and through brake pipe configurations.

Qualifications for Four-Way Subbase Mounted Air Valves for Automotive Manufacturing Applications

This SAE Recommended Practice describes the requirements necessary for four-way subbase mounted, directional air-control valves to be used in automotive manufacturing applications. It includes minimum performance, operation, and physical requirements to qualify the valves for service in automotive manufacturing applications. Included are spool, poppet, and sliding disc types of air valves for pressures in a range of vacuum to 1034 kPa (150 lb/in2) gage, and temperatures from −18 to 60 °C (0 to 140 °F).

Hydraulic Motor Test Procedures

This test code describes tests for determining characteristics of hydraulic positive displacement motors as used on construction and industrial machinery as referenced in SAE J1116. These characteristics are to be recorded on data sheets similar to the one shown in Figure 1. Two sets of data sheets are to be submitted: one at 49 °C (120 °F) and one at 82 °C (180 °F).

Thermal Containment Efficiency of Sleeve Materials

This SAE Standard measures the percent thermal efficiency of materials in sleeve form used to contain heat or insulate around a hot component. The percent thermal efficiency (%TE) is determined by measuring the power difference expended by the heat source (cartridge heater) with and without the test sleeve at the specified temperature. See SAE J2302 to measure radiant heat flow of sleeves.