Browse Topic: Transmission valves

Items (16)
Find
Progress in Demonstration Prototypes Using the Continuously Variable Planetary Technology in a C-Class RWD Car and a Fork Lift Truck2015-01-110404/14/2015
In order to introduce Dana's Variglide Continuously Variable Planetary (CVP) technology to the mobility industry, Dana has produced demonstrator transmissions for use in a rear wheel drive C-class car and in a fork lift truck. The intention is to illustrate how the CVP can be combined with conventional transmission technology to produce either a continuously variable transmission with the ratio range comparable to that of the latest step ratio transmissions, or used in a simple IVT configuration for off-highway applications. The co-axial design of the CVP allows it to package well into current drivetrain solutions. The ratio control of the device is fast, precise, and stable and the CVP does not require high power consumption for clamping. Multiple power flow configurations of the CVP are shown to blend well with current conventional transmission technology as well as future hybrid configurations.
Sexton, Patrick, Smithson, Robert A., McIndoe, Gordon
Technical Paper
General Motors Hydra-Matic & Ford New FWD Six-Speed Automatic Transmission Family2007-01-109504/16/2007
The Hydra-Matic 6T70 is General Motors first model of a new, two-variant front wheel drive (FWD) six speed automatic transmission family. The second variant is a higher capacity model, the 6T75. The transmission was co-developed with Ford Motor Company. The 6F50 is the Ford variant that aligns with the GM 6T70 transmission. Approximately eighty five percent of the hardware is shared or common between the GM and Ford transmission variants. Ford will also have a higher capacity variant the 6F55 to align with the GM 6T75. The first GM application is the Saturn Aura for the 2007 Model Year. The Ford Edge and Lincoln MKX in MY 2007 will be the first applications for the 6F50. While the Hydra-Matic and Ford FWD six-speed family was designed with two variants in mind, the designed in modularity requires only changes to the second and third axis and case housings depending on specific torque requirements. This modular design enables a tremendous amount of part sharing. Modularity minimizes
Lewis, Charles, Bollwahn, Bryce
Technical Paper
Advances in Automatic Transmission Cleanliness2001-01-037203/05/2001
This paper presents the rationale and underlying logic for automatic transmission filtration contaminant control (ATFCC). This approach relies upon an integrated filtration system as opposed to simply sandwiching in a piece of filter media or metal screen in the traditional transmission oil sump area. Most significantly, quantitative filtration system design and specification will result from implementation of a thorough ATFCC approach. A new transmission filter test procedure is also presented which closely represents the field operation of these types of filters. Test results are presented which compare the new test procedures results' with more traditional Multipass Filter test results.
Eleftherakis, John G., Khalil, Abrahim, Parnell, Doug, Bill, Pizzo, Haggard, Dan
Technical Paper
Optimizing Automatic Transmission Filtration1999-01-000403/01/1999
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
Technical Paper
Saturn Transmission Family; Product and Process Flexibility by Design91193909/01/1991
The Saturn vehicle concept evolved from efforts to derive a domestically produced “small car” that would make use of innovative design and manufacturing techniques (1). Within this framework a new transmission family was developed based on a reassessment of the fundamentals involving design and manufacturing.
Kosin, John F., Maguire, Joel M., Oniga, Louis B.
Technical Paper
Development of a Laboratory Test Contaminant for Transmissions90056102/01/1990
This paper details an extensive study that was performed to define, quantify, and describe the contaminant found in automotive type transmissions. The results from the study were used to manufacture a new commercially available test contaminant that simulates the contaminant found in high mileage transmissions. The study was undertaken because no commercially available contaminant existed to test transmission related components, especially valves, pumps and filters. Most accepted test contaminants such as AC Fine or Course Test Dust were known not to give representative contaminant related results. The study consisted of collecting 29 oil samples from various mileage vehicles. The particle size distribution, gravimetric level, and chemical composition were found from the samples. Correlation of this data back to the actual materials of manufacture found that four different base stock materials were contributing over 90% (by weight) of the contaminant found in vehicles with 70,000 to
Eleftherakis, John G., Khalil, Abrahim
Technical Paper
The FR35-Reliability and Productivity for the Quarrying and Mining Industries85080504/01/1985
A new Fiatallis 5.4 m3 (7.0 yd3) Four Wheel Drive Loader has been developed to replace the 945-B. The features and component selection were influenced by world-wide performance and reliability requirements. This paper summarizes the development program and reviews the major features of the FR35 Wheel Loader.
Lorenc, Don, Condra, James
Technical Paper
Electronic Controls for Bus, Truck and Off–Highway Vehicle Transmissions82090902/01/1982
Most bus, truck and off-highway vehicle automatic transmissions today have hydraulic controls similar to the type used on automobile transmissions. Because the number of transmission applications is increasing rapidly and customer demands for improved vehicle performance, greater durability and better reliability are growing, present hydraulic controls are being pushed to their capacity. Overall transmission performance can be improved by replacing hydraulic controls with electrohydraulic controls which incorporate microcomputer-based electronics for intelligence, but continue to employ hydraulics for power to apply the clutches in the transmission. Important benefits available with a microcomputer-based controls system include: shift point optimization, improved shift point accuracy, transmission-application customization, mechanical linkage elimination, improved fuel economy, and overall powertrain optimization.
Harmon, Kenneth B., Struthers, Keith D.
Technical Paper
ELECTRONICS ON A JOHN DEERE SCRAPER80067504/01/1980
The JD862 Scraper uses armrest mounted electrical switches to control the transmission and scraper functions. A microprocessor based transmission controller provides different shifting sequences for different operating requirements. This controller also includes on-board diagnostics to monitor for electrical failures and can immediately react to reduce the effect of a failure. An electronically controlled elevator provides infinitely variable elevator speeds.
Gruben, Wayne E., Heino, Dean L.
Technical Paper
Expanding the Versatility of the Powershift Transmission by Incorporating Electrohydraulic Control Systems79088402/01/1979
In many powershift transmission applications such as cranes, excavators, articulated vehicles, vehicles with multiple transmissions, and vehicles with remote mounted transmissions, mechanical linkage systems normally used to operate the control valve become impractical and/or expensive. After evaluating these various applications it was determined that an electrohydraulic control system has a multitude of advantages over its mechanical counterpart. With these objectives in mind Funk Manufacturing has designed and developed a series of electrohydraulic control systems which function in concert with the Funk Shift-0-Matic transmissions. The control valve and some of the control systems are briefly described in this paper.
Jones, William R., Harris, Robert W.
Technical Paper
The 1978 Chrysler Torque Converter Lock-Up Clutch78010002/01/1978
A torque converter lock-up clutch was introduced by Chrysler Corporation in a majority of its passenger cars in the 1978 model year. The lock-up clutch improves fuel economy by eliminating torque converter slip in direct gear above a predetermined speed. The clutch and its controls were designed to fit within the confines of the existing transmission. The development of the clutch was primarily concerned with achieving adequate endurance life, good shift quality and isolation of torsional vibrations.
Blomquist, A. P., Mikel, S. A.
Technical Paper
Automatic Shift Control for Heavy Duty Transmissions72075302/01/1972
Through the years, changes have occurred in vehicle design that have necessitated a re-evaluation of transmission shift systems. Vehicle trends have been towards increased size, articulation, and multi-power usage. Mechanical linkages for these vehicles have become costly to design and build, and are troublesome to maintain due to wear, improper adjustment, and damage. In 1968 an electric shift control concept was introduced for the off-highway heavy duty transmission market to eliminate the problems associated with mechanical, hydraulic, and air linkages. This system consisted primarily of three components: shift tower, wiring harness, and range selector control valve body. Now a new electronic shift control has been developed which enables the transmission with electric shift to achieve the optimum in fully automatic operation. The electronic control ensures that all shifts occur at optimum speeds, eases driver operation, and provides a unit that is precise, reliable, maintenance
Schmidt, J. W.
Technical Paper
Current Design of Valve Body and Governor Systems62010101/01/1962
Hewitt, D. C., Leonard, R. L
Technical Paper
DESIGNING AN AUTOMATIC TRANSMISSION FLUID59019701/01/1959
This paper covers the steps involved in designing an automatic transmission fluid which is aimed at the, service station and original fill markets. A discussion of the design targets together with component selection from the standpoint of fluid performance is presented. Also included is a review of the test facilities we have used in developing the data needed for finalizing on a formulation.
BOZZELLI, A. J.
Technical Paper
Chrysler Torque Flite Transmission58001801/01/1958
THIS paper describes the Chrysler TorqueFlite transmission, a 3-speed unit with torque converter. The discussion includes details of the push-button controls of the automatic transmission, operation of the transmission and hydraulic controls, power transmission through the gearbox, and design of several of the components. The authors think that the TorqueFlite offers to a greater degree the advantages of automatic transmission: ease of operation and maximum power over a wide range of car speeds.
Jeffe, S. D., Cartwright, B. W.
Technical Paper
HYDRA-MATIC TRANSMISSION TRUCKING54020901/01/1954
EDWARDS, W. W.
Technical Paper
Items per page:
1 – 16 of 16