Browse Topic: Transmission valves

Items (8)

Assessing the Likelihood of Binding in Distorted Stepped Radius Cylinder Bores

2014-01-0395

04/01/2014

Interference assessments of a stepped-radius power-train component moving within a deformed stepped bore often arise during engine and transmission development activities. For example, when loads are applied to an engine block, the block distorts. This distortion may cause a cam or crankshaft to bind or wear prematurely in its journals as the part rotates within them. Within an automatic transmission valve body, care must be taken to ensure valve body distortion under oil pressure, assembly, and thermal load does not cause spool valves to stick as they translate within the valve body. In both examples, the mechanical scenario to be assessed involves a uniform or stepped radius cylindrical part maintaining a designated clearance through a correspondingly shaped but distorted bore. These distortions can occur in cross-sections (“out-of-round”) or along the bore (in an “s” or “banana” shaped distortions). To assess clearance in a deformed (stepped or uniform) bore, a new optimization

Aluru, Kiranmaye, Geist, Bruce, Resh, William

Dana

13OFHD0613_0906/13/2013

Innovation that addresses global megatrends Government regulation and continued high fuel prices have driven a multitude of technologies proposed for the off-highway market, which include everything from hybrids and alternative fuels to advanced lightweight materials and emissions controls. Dana strongly believes in the continued development of new technologies-a belief reflected by the $161 million we spent on engineering in 2012. As we develop new technologies, we use analysis of megatrends that allow us to predict market trends and requirements on a global and regional basis and then use these predictions to target our R&D spending

Constand, George

Forging ahead in metal forming

AUTODEC03_0612/01/2003

Crude though the means may have been, humans began making and shaping metal several millennia ago. It's a cleaner and more refined undertaking today. In many places, making metal automotive parts remains a dirty business with the same type of smoke and grime that have marked the industry since its inception. Those are not Metaldyne places. The Michigan-based company is putting great emphasis on clean and efficient manufacturing as it tries to get more value-add business from OEMs

Ponticel, Patrick

Optimizing a tractor frame for improved cabin NVH

OFHSEP00_0309/01/2000

To address an aging agricultural workforce and modern ergonomic guidelines, researchers at Doshisha University and Kubota modeled medium- and large-sized agricultural tractors to reduce vibration and noise and increase comfort. New emphasis is being placed on agricultural vehicles for improved safety, comfort, and functionality. The monocoque-type frame of today's tractors consists of the engine, power transmission case, and differential case in modular assemblies. Main vibration sources are the engine, drive system, and exhaust system. Vibrations travel into the cabin through the frame and are amplified when transmissions from excitation sources coincide with the natural frequency of the frame. To decrease vibration and noise of the tractor, it is necessary to improve the dynamic characteristics of the frame. From measuring tractor part vibration characteristics and cabin noise characteristics, researchers at Doshisha University and Kubota Corp. determined that the bending mode of the

Optimizing Automatic Transmission Filtration

1999-01-000403/01/1999

The increasing focus on automotive automatic transmission contamination levels needs to result in both dramatic manufacturing system changes and transmission filtration needs. This paper focuses on defining and quantifying automatic transmission contaminant levels and the filtration needed to remove this contaminant. Specific data are presented which quantify the particle count and gravimetric level of transmissions oil samples. The debris found from numerous used filter analyses is also presented. Representative transmission valve contaminant sensitivity data is then shown which highlights the deleterious effect contaminant has on transmission valve operation. This paper concludes with the particle removal efficiency of common transmission sump filters being shown to be unable to remove many of the most damaging particles which result in transmission valve sticking, wear, and general shift quality degradation. Recommendations for correcting this situation are presented

Eleftherakis, John G., Khalil, Ibrahim

Alloy 6020: A Lead-Free Aluminum Alloy Featuring “A” Rated Machinability

98045902/23/1998

In 1990, the development efforts at ALCOA's Massena Operations began with the objective to create a free machining alloy that would be comparable to a lead bearing alloy, 6262, in strength, machinability, corrosion resistance, anodizing, brazing, and welding responses while eliminating the health and environmental concerns associated with lead. The results from years of controlled experimentation was a 1996 patented and registered 6020 alloy (nominal 1.1% Sn addition) which proved all of the objectives were met and the machinability performance was enhanced over the “B” rated 6262 product. Proclaimed as the fastest growing new product in automotive and miscellaneous applications the full cold finished product line in T8, T9 and T651 tempers excel in markets where 6262, 6061, 2011 aluminum alloys and 12L14 steels are used today. The automotive applications include ABS manifolds, brake parts, A/C components, transmission valves and transmission sleeves. More recent development activities

Spillard, Colleen M.

High-Precision Cutting Tool Systems for the Manufacture of World-Class Powertrain Components

90176609/01/1990

HIGH PRECISION CUTTING TOOL SYSTEMS FOR THE MANUFACTURE OF WORLD-CLASS POWERTRAIN COMPONENTS - Emphasis on: Illustrations of quality enhancing, yet cost saving machining. Developing cutting tool systems for engine components, such as valve train, camshaft, crankshaft, cylinder bore and connecting rods. Developing cutting tool systems for transmission cases and transmission valve bodies. Flexible manufacturing, high speed machining, predictable cutting performance, a minimum of machine down time - challenges to be met only by tooling systems suppliers. Advanced cutting tool materials. Tooling accessories as part of improving machine tool accuracy. Outlining a quality machining periphery and recommending optimum machining parameters

Erdel, Bert P.

Computerized Testing of Automatic Transmission Main Control Assemblies

660121

02/01/1966

A new method of testing Automatic Transmission Main Control Assemblies has been developed which provides increased reliability in transmission valve body testing. This method employs an electro-hydraulic test stand sequenced by an IBM 1710 computer system. The computer controls the test cycle, accurately compares test values against test specification parameters, records all test values, and determines whether the transmission Main Control meets all specifications

Hughes, E. J., Boston, G. O., Diddens, P. A.

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