automotive transmissions

Articles About automotive transmissions


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1 CTI Symposium Raises the Bar on Transmission Technology (June 2014)

The 8th International CTI Symposium on Automotive Transmissions, HEV and EV Drives took place in Rochester, Michigan from May 12-15. The event kicked off with its popular introductory seminar "Basics and Practice of Automotive Transmissions."

2 Powder Metal Gear Technology: A Review of the State of the Art (March 2016)

During the past 10 years, the PM industry has put a lot of focus on how to make powder metal gears for automotive transmissions a reality. To reach this goal, several hurdles had to be overcome, such as fatigue data generation on gears, verification of calculation methods, production technology, materials development, heat treatment recipes, design development, and cost studies. All of these advancements will be discussed, and a number of vehicles with powder metal gears in their transmissions will be presented. How the transmissions have been redesigned in order to achieve the required stress levels while minimizing weight and inertia, thus increasing efficiency, will also be discussed.

3 Transmissions in Transition (June 2015)

Experts gathered at the 9th CTI Symposium to discuss the challenges of reducing noise, improving energy efficiency and meeting the changing demands of the marketplace

4 Automotive Adjustment (April 2019)

The automotive industry is shifting for everyone, bearings manufacturers included. Here's what you need to know to make sure you're shifting with it.

5 The One-Stop Shop for Automatic, HEV and EV Drives (April 2018)

CTI Symposium USA Examines North American Transmission Market Strategies

6 General Modeling Method of Power Losses in Transmission with Parameter Identification (October 2019)

In this paper, the models for different power loss sources in transmissions from literature are applied and compared, which form the two methods - ISO 14179-2 and the joint model to estimate the power losses in a transmission. A 2-speed transmission in an electric vehicle is used as a case study to compare the two methods and validate them with experimental data.

7 Cars with Jet Engines (June 2019)

In the late 1940s, the U.S. auto industry started an exciting experiment and spent decades on it. One result came in '63, when the Turbine was introduced by Chrysler Corp., now a part of Fiat Chrysler Automobiles (FCA). In appearance, the two-door, four-passenger car looked like a regular car, but it wasn’t. Under its sleek shell, the car had a jet engine.

8 Hands-Free Driving in the 1950s (April 2019)

Yes, the headline is correct: Autonomous vehicles are not a new idea. In fact, in the 1950s, handsfree driving so interested General Motors engineers that they designed a concept car for it. And in 1956, at its own auto show, the GM Motorama, the automaker unveiled the car, the Firebird II.

9 Validation Approach of PM Gears for e-Drive Applications (October 2019)

Key technical drivers which can be addressed by advanced PM manufacturing technologies are, for example, the need for system downsizing in transmissions and differentials, the need for developing systems with higher power density and the strong NVH (Noise Vibration Harshness) requirements - especially for electrified transmissions or e-axle solutions.

10 Compact Loaders for Compact Spaces (February 2012)

Compact loaders are employed where large machines have no access or are over dimensioned. New hydrostatic drives from ZF meet the demanding needs of this market.

11 Improved Fuel and Energy Efficiency Through Optimized Bearing Design and Selection (February 2008)

Today, better fuel economy is a main objective in the automotive development process. It remains top-of-mind with the auto industry and consumers because of costs and environmental impacts. Because the industry’s average fuel-economy standard is required to increase by 40 percent by 2020, manufacturers and engineers are working to develop fuel-efficient, environmentally friendly and reliable designs for vehicles.

12 Force Control Assists in Helicopter Transmission Overhaul (December 2017)

Oil shear brake technology is the key to quick and reliable test stand development.

13 Product News (June 2012)

The complete Product News section from the June 2012 issue of Power Transmission Engineering.

14 Net-Forged Bevel and Transmission Gears (August 2014)

What are the applications for net-forged gears. Are they used outside automotive differentials?

15 Making Sense Out of Autonomous Vehicles (March 2019)

Autonomous vehicles (AVs), in particular, are set to utilize sensors for a multiple array of new technologies. In fact, lidar sensors may be the key to unlocking the potential of driverless cars in the future.

16 Industry news (August 2016)

News from around the Industry

17 Is Splash Lubrication Compatible with Efficient Gear Units for High-Speed Applications (October 2015)

A thermo-mechanical model of a splash lubricated one-stage gear unit is presented. This system corresponds to a first step towards the design of a hybrid vehicle gearbox that can operate up to 40,000 rpm on its primary shaft. The numerical model is based on the thermal network method and takes into account power losses due to teeth friction, rolling-elements bearings and oil churning. Some calculations underline that oil churning causes a high amount of power loss. A simple method to reduce this source of power losses is presented, and its influence on the gear unit efficiency and its thermal capacity is computed.

18 Innovative Design Solves AutomotiveParts Assembly Challenge (February 2015)

Weiss North America, Inc. of Willoughby, OH has designed and produced rotary tables and other components for the automation industry for more than 45 years. When approached by Alpha Integration, Inc. of Murfreesboro, TN, a manufacturer of turnkey automated assembly, vision and testing systems, to provide a reliable turnkey solution for their 6-foot-tall automotive parts assembly machine, Weiss ‘tiered-up’ an innovative chassis and indexing table system solution.

19 How Does An Electric Motor Work (October 2016)

If you’re an electrical engineer you know how an electric motor works; if you aren’t, it can be extremely confusing. Therefore, here’s the simplified explanation (or the “how an electric motor works for dummies” version) of how a four-pole, three-phase AC induction motor works in a car.

20 Where We Stand (April 2018)

The automotive industry is on the precipice of a shift. Here's what the future looks like and what you need to know to prepare for it.

21 The Future of E-Mobility (October 2018)

Schaeffler Touts System Solutions and Electrification Advancements at Detroit Symposium

22 Influential Criteria on the Optimization of a Gearbox, with Application to an Automatic Transmission (September 2018)

In the design of an automatic transmission gearbox, the variation of one parameter can result in different system performances due to the strong interdependencies among all components. For given transmission ratios, component lifetimes and safeties, or space restrictions, improvements in efficiency, noise, and weight can be achieved.

23 Testing of Alternative Spiral Bevel and Hypoid Gear Theory (August 2014)

Following is a presentation of a gear design based upon a theoretically perfect gear technology, for which an overview is offered for consideration. What follows is a report on the design's testing and subsequent manufacture of a hypoid gear pair for a 1999 Ford Mustang.

24 How to Get the Most Realistic Efficiency Calculation for Gearboxes (April 2015)

In recent years the estimation of gearbox power loss is attracting more interest — especially in the wind turbine and automotive gearbox industry — but also in industrial gearboxes where heat dissipation is a consideration as well. As new transmissions concepts are being researched to meet both ecological and commercial demands, a quick and reliable estimation of overall efficiency becomes inevitable in designing the optimal gearbox.