SAE J2311-1999 Automatic Transmission Hydraulic Pump Test Procedure.pdf
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1、SAE Technical Standards Board Rules provide that: “This report is published by SAE to advance the state of technical and engineering sciences. The use of this report is entirely voluntary, and its applicability and suitability for any particular use, including any patent infringement arising therefr
2、om, is the sole responsibility of the user.” SAE reviews each technical report at least every five years at which time it may be reaffirmed, revised, or cancelled. SAE invites your written comments and suggestions. QUESTIONS REGARDING THIS DOCUMENT: (724) 772-8512 FAX: (724) 776-0243 TO PLACE A DOCU
3、MENT ORDER: (724) 776-4970 FAX: (724) 776-0790 SAE WEB ADDRESS http:/www.sae.org Copyright 1999 Society of Automotive Engineers, Inc. All rights reserved.Printed in U.S.A. SURFACE VEHICLE 400 Commonwealth Drive, Warrendale, PA 15096-0001 RECOMMENDED PRACTICE Submitted for recognition as an American
4、National Standard J2311 ISSUED JAN1999 Issued1999-01 Automatic Transmission Hydraulic Pump Test Procedure 1.Scope This SAE Recommended Practice provides a method to determine the performance characteristics of the hydraulic oil pumps used in automatic transmissions and automatic transaxles. This doc
5、ument outlines the specific tests that describe the performance characteristics of these pumps over a range of operating conditions and the means to present the test data. This document is not intended to assess pump durability. 2.References 2.1Applicable Publications The following publications form
6、 a part of this specification to the extent specified herein. Unless otherwise specified, the latest issue of all publications shall apply. 2.1.1SAE PUBLICATIONS Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. SAE J1276 Standardized Fluid for Hydraulic Component Tests SAE J116
7、5 Reporting Cleanliness Levels of Hydraulic Fluids 2.1.2ISO PUBLICATION Available from ANSI, 11 West 42nd Street, New York, NY 10036-8002. ISO 4412-1 Hydraulic fluid power Test code for determination of airborne noise levels Part 1: Pumps ISO 4412-3 Hydraulic fluid power Test code for determination
8、of airborne noise levels Part 3: Pumps Method using a parallelepiped microphone array NFPA T2.6.1 Method for Verifying the Fatigue and Static Pressure Ratings of the Pressure Containing Envelope of a Metal Fluid Power Component 2.2Related Publications The following publications are provided for info
9、rmation purposes only and are not a required part of this document. 2.2.1SAE PUBLICATIONS Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001. SAE J745 Hydraulic Power Pump Test Procedure SAE J1116 Categories of Off-Road Self-Propelled Work Machines SAE J2311 Issued JAN1999 -2- 3.D
10、efinitions 3.1Actual Capacity The measured output flow at prescribed conditions of pressure, speed, and temperature. It is actual flow rate delivered from the pump discharge port while operating at the prescribed conditions. 3.2Actual Displacement See 3.23. 3.3Actual Torque The measured input torque
11、 required to operate the pump at prescribed conditions of pressure, temperature, and speed. It includes frictional losses. 3.4Aeration The mixing beyond the solution point of gas and fluid so as to provide a fluid medium having two distinct phases, namely one liquid, and one gaseous. 3.5Airborne Noi
12、se Pressure fluctuation of the ambient air surrounding a vibrating element, the magnitude of the pressure fluctuations being sufficient for the human ear to sense sound, the threshold of which is near 2.065x105 Pa. 3.6Axial Thrust Capacity An externally applied force applied to the pump assembly. It
13、 may be applied to the housing which carries the force to ground or applied to the input shaft which transmits the force to the pumping elements. 3.7Bulk Modulus The reciprocal of compressibility. A measure of fluid “ stiffness,” expressed in pressure units, defined as Differential Pressure/(Initial
14、 volume Final volume). Secant Bulk Modulus is the average between two points on the Bulk Modulus curve. The Tangent Bulk Modulus is the value at a specific point on the curve. 3.8Cavitation The formation of bubbles or vapor “cavities” in liquid when the local static pressure is reduced to or below t
15、he fluid vapor pressure. 3.9Critical Inlet That operating condition of constant speed and inlet temperature, and decreasing suction pressure artificially, that results in less than complete filling of the pumping chamber. 3.10 Direction of Rotation When viewed from the pump drive shaft end, the cloc
16、kwise (right hand) or counter- clockwise (left hand) rotation of the shaft that produces discharge from the discharge port. 3.11 Discharge Pressure The static pressure at the pump discharge port, downstream of the confluence of all pumping chambers. 3.12 Entrained Air The result of aeration. The mix
17、ture of undissolved gas, usually air, beyond the solution point, usually expressed in percent air by volume. 3.13 Erosion The damage, loss of material, or permanent deformation of pressure containing surfaces as the result of collapsing bubbles, either from aeration or cavitation. 3.14 Fluid Borne N
18、oise The oscillations of fluid static pressure resulting from fluid disturbances due to discharging pump chambers, standing waves, oscillating valves, or other disturbances. The resulting wave form has amplitude and frequency characteristics similar to airborne noise 3.15 Head Loss A loss in total e
19、nergy of a fluid in motion, usually the result of frictional losses in conduits, but often includes component losses (orifices, valves, etc.) and energy loss from work exerted on the system. Also known as “Pressure Drop.” SAE J2311 Issued JAN1999 -3- 3.16 High-Speed Fill Limit The rotative speed at
20、which the pump delivery/speed curve diverges from theoretical. It is differentiated from “Critical Inlet“ in that the inlet port is unrestricted. The divergence results from the inability of the available inlet energy to accelerate the inlet fluid to a velocity equal to the moving pump inlet chamber
21、s. “Theoretical HSFL” is calculated assuming no inlet losses. 3.17 Hydraulic Output Power The fluid power, expressed in power units, available to do useful work. See Equation 1. (Eq. 1) 3.18 Inlet Pressure The static pressure at the pump inlet port upstream of the pumping chambers. 3.19 Leakdown Rat
22、e The rate, expressed in time units, that characterizes the ability of a pump assembly with all ports closed and sealed to maintain a vacuum above a specified level. A measure of air infiltration. 3.20 Maximum Rated Pressure The maximum nominal (excludes tolerances and pulsation) discharge pressure
23、the pump is designed to operate at continuously for a specified period. 3.21 Maximum Rated Speed The maximum input speed the pump is designed to operate at continuously for a specified period. 3.22 Maximum Rated Temperature The maximum fluid temperature at the pump inlet the pump is designed to oper
24、ate at continuously for a specified period. 3.23 Measured Displacement That measured amount of volume displaced through one revolution by a positive displacement machine. The Measured Displacement does not include any losses for pump internal leakage. May also be known as “Actual Displacement”. 3.24
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