Refine Your Search

Topic

Author

Affiliation

Search Results

Collection

Control System Design & Calibration, 2018

2018-04-03
Separate sub-sessions cover powertrain control, calibration, and system-level optimization processes related to achieving stringent market fuel economy, emissions, performance, reliability, and quality demands. Topics include the control, calibration, and diagnostics of the engine, powertrain, and subsystems related to energy management in conventional and hybrid operation, considering the simultaneous optimization of hardware design parameters and control software calibration parameters.
Collection

Powertrain NVH, 2017

2017-03-28
The papers in this collection reflect the recent advances on the research, development and practices of Powertrain NVH treatment. The technical papers are of interest to powertrain system designers, testing specialists, NVH experts, and other individuals who evaluate and develop technologies to control powertrain NVH. The coverage includes: engine, engine subsystem and components noise and vibration; powertrain systems noise measurement and instrumentation; powertrain systems noise analysis.
Collection

Controls for Hybrids and Electric Powertrains, 2018

2018-04-03
The papers in this collection cover powertrain control processes related to achieving stringent market fuel economy, emissions, performance, reliability, and quality demands of hybrid and electric powertrains. Topics include the control, calibration, and diagnostics of the engine, powertrain, and supporting electromechanical subsystems related to energy management.
Collection

Control System Design & Calibration, 2017

2017-03-28
Separate sub-sessions cover powertrain control, calibration, and system-level optimization processes related to achieving stringent market fuel economy, emissions, performance, reliability, and quality demands. Topics include the control, calibration, and diagnostics of the engine, powertrain, and subsystems related to energy management in conventional and hybrid operation, considering the simultaneous optimization of hardware design parameters and control software calibration parameters.
Collection

Controls for Hybrids and Electric Powertrains, 2017

2017-03-28
The papers in this collection cover powertrain control processes related to achieving stringent market fuel economy, emissions, performance, reliability, and quality demands of hybrid and electric powertrains. Topics include the control, calibration, and diagnostics of the engine, powertrain, and supporting electromechanical subsystems related to energy management.
Collection

Powertrain Thermal Management: Combustion Chamber, Battery Cooling, and Engine Cooling, 2017

2017-03-28
The papers included in this collection cover modeling (zero-D, 1D, 2D, 3D CFD) and experimental papers on: combustion chamber, systems (lubrication, cooling, fuel, EGR); components (oil pumps, coolant pump, fuel injectors, compressors, turbines, turbochargers, torque converters, gear box, fans, bearings, valves, ports, manifolds, turbine housing); heat exchangers (radiators, oil coolers); aftertreatment (SCR, DOC, DOF, exhaust gas cooling); battery cooling (HEV, EV, motor/generator) and controls (passive and active).
Video

Development of a Hybrid Control Strategy for an Advanced Parallel HEV Powertrain with Two Electrical Axles

2012-05-29
This paper proposes a current limits distribution control strategy for a parallel hybrid electric vehicle (parallel HEV) which includes an advanced powertrain concept with two electrical driving axles. One of the difficulties of an HEV powertrain with two electrical driving axles is the ability to distribute the electrical current of one high voltage battery appropriately to the two independent electrical motors. Depending on the vehicle driving condition (i.e., car maneuver) or the maximization of the entire efficiency chain of the system, a suitable control strategy is necessary. We propose an input-output feedback linearization strategy to cope with the nonlinear system subject to input constraints. This approach needs an external, state dependent saturation element, which translates the state dependent control input saturation to the new feedback linearizing input and therefore preserves the properties of the differential geometric framework.
SAE MOBILUS Subscription

Transmissions and Drivelines

2010-10-01
The Transmissions and Drivelines subscription provides unlimited access to SAE Technical Papers covering ten years of global applied research, development and applications on transmissions and drivelines. The information in this resource will help you address demands to produce quiet, durable systems that run smoothly and are highly efficient. The more than 500 papers in this resource cover: Valve Bodies Torque Converters Clutches Gears Modeling and Simulation System-level Architecture
Standard

Definition and Measurement of Power Transfer Unit Speed-Dependent Parasitic Loss

2013-03-25
WIP
J3039
This SAE Recommended Practice covers power transfer units (PTUs) used in passenger car and light truck applications. PTUs may be of the chain, geared, single- or multi-axis type and may incorporate a disconnect system that is manually or electronically shifted, although other configurations are possible. The operating points (speeds, temperatures, etc.) were chosen to mirror those of the United States Environmental Protection Agency Vehicle Chassis Dynamometer Driving Schedules (DDS).
SAE MOBILUS Subscription

Advanced Hybrid Vehicle Powertrains

2010-10-01
The Advanced Hybrid Vehicle Powertrains subscription provides unlimited access to SAE Technical Papers covering over six years of global applied research, development and applications in advanced hybrid vehicle powertrains. This subscription addresses the issues of system and performance optimization and cost analysis. The more than 200 papers in this resource cover: Energy Storage Technologies and Systems Advanced System Design Optimization and Evaluation Vehicle System Modeling Developments and Advances in Components and Systems Thermal Management Fuel Economy Testing Methods Powertrain System Integration
Technical Paper

Self-Energizing Brakes

1928-01-01
280018
THE theory and characteristics of brakes of the Steeldraulic system are set forth and their application in practice is explained. Self-energizing brakes are said to be desirable because they allow large clearances, low pedal-effort and frictional coefficient and, if properly designed, give a high degree of efficiency with smooth uniform action. To accomplish these results, the controls should deliver equal and accurate actuation to all brakes at all times, be designed to minimize the possibility of becoming inoperative on account of dirt and rust, require no servicing, be noiseless and of good appearance, and remain unaffected by climatic changes. Shoe design should allow very liberal limits and tolerances in wheel, axle and drum assemblies, without causing erratic brake-action or noises. The brake hook-up should follow the simplest line and use the least number of connecting links.
Technical Paper

The deLavaud Automatic Transmission

1928-01-01
280038
MENTIONING the various attempts that have been made to secure continuous progressive changes of gear in the automobile, the author states that nothing of this sort is of value unless it is automatic. He has designed a transmission consisting of a wabble-plate which actuates six connecting-rods that operate as many roller clutches on the rear axle. Changes in speed result from varying the inclination of the wabble-plate, and this is controlled automatically through the combined effects of inertia and the reaction of resistance. This transmission has been applied to a number of cars of different weights, some of which have seen much service. The action of the various elements of the transmission is analyzed with the aid of drawings, diagrams and formulas, and the proportions that have been found most successful are stated. This transmission is combined with a gearless differential and a planetary reverse-gear.
Technical Paper

Structure of Six-Wheel Vehicles

1929-01-01
290073
RIGID six-wheel vehicles and semi-trailer combinations are classified and described as to load distribution, application of power, arrangement of spring suspension and of tires. Consideration is given to the desirability of a conventional differential between the two driving axles, and the advantages to be gained by substituting a differential in which the action is limited. The semi-trailer is said to be useful for specialized services and to compete rarely with the rigid six-wheeler. The automotive industry is said to be following in the steps of railway engineers in providing more wheels for greater loads. At the close of the paper is given a bibliography of S.A.E papers and general periodical literature referring to six-wheel vehicles.
Technical Paper

Four-Wheel Drives for Six-Wheel Chassis

1929-01-01
290074
MANY interesting problems in design are presented in the application of four-rear-wheel drive to a six-wheel vehicle. As axle design is intimately related to the rest of the chassis construction, the axle builder is concerned with the type of spring mounting, the method of taking the torque, and the distribution of the load. The author specifies a number of factors that positively must be taken into account and provided for in any construction that is to prove successful. He then shows by photographs and describes a number of rear-end four-wheel-drive constructions that have been built and put into operation.
Technical Paper

An Analysis of Tires and Wheels as Causes of “Tramp”

1933-01-01
330042
THIS paper presents the solution of the factors in tires and wheels that cause a particular type of front-end vibration termed “tramp,” which is a vertical vibration of the front axle accompanied by a small degree of simultaneous oscillation of the wheel assembly about the king pin. This vibration in turn sets up the disturbance of the body and chassis. The front-axle vibration is caused by the unbalance and variation in rolling radius of the rotating front-wheel assemblies. The theoretical action of these two factors is developed in detail and supported by experimental results. The foregoing two factors act independently. The resultant of the two periodic forces which they set up depends on their phase relationship.
Technical Paper

Independent Wheel Suspension

1933-01-01
330029
THE study of composite front axles, called fallaciously “independent wheels,” deals with the accelerations due to the inequalities of the road surface and with the resonance of the car caused by the vibrations thus produced. This study cannot be treated separately but must be taken as part of the complete problem of the resonance of the whole car to the road, according to Mr. Broulhiet. Extensive experiments have confirmed that vertical suspension, road-holding qualities, coachwork resonance and the resonance of the steering gear are all interdependent. Therefore, the problem of road resonance must be dealt with as a whole, if one wishes to grasp the problem in its complexity and have that scientific backing necessary for rapid progress in the mind of the designer. Mr. Broulhiet outlines, from personal research in this field, four basic conditions to obtain the best results. The geometry and equilibrium conditions of proposed mechanical realizations are analyzed.
Technical Paper

PROGRESS MADE IN GARAGE EQUIPMENT

1922-01-01
220025
The Chicago Service Meeting paper relates specifically to the type of garage equipment that is used to handle the motor vehicle in preparation for its repair. The devices illustrated and described are those designed to bring in disabled cars, and include wrecking cranes and supplementary axle trucks; portable cranes and jacks on casters for handling cars in a garage; presses, tire-changing equipment and wheel alignment devices; engine and axle stands; and miscellaneous minor apparatus. The different factors mentioned emphasize the great need of standardization. The thought is not to do away with a car's individuality, but to construct all parts so that cars may have efficient service to the highest degree through the agency of every serviceman.
Technical Paper

CONVEYOR EQUIPMENT IN A SMALL PRODUCTION PLANT1

1923-01-01
230052
To install conveyors in a going automobile manufacturing plant of moderate size, without interrupting production, and with a minimum amount of rearrangement of the plant and an investment commensurate with the saving to be effected, was the problem, the solution of which is herein described. The conditions that determined whether power-driven or gravity-actuated conveyors should be used are discussed and the various types required for handling raw stock, for machining operations, for sub-assemblies and for finished assemblies are indicated.
Technical Paper

SOME NOTES ON BRAKE DESIGN AND CONSTRUCTION1

1923-01-01
230040
Brakes have three functions: (a) maintaining a car at rest, (b) reducing the speed of a vehicle or bringing it to a stop and (c) holding a vehicle to a constant speed on a descending grade. The kinetic energy of a moving vehicle is directly proportional to the weight of the vehicle and to the square of its speed. The amount of heat produced in the braking surfaces of a vehicle descending a given grade for a given distance will be the same whether the speed be high or low, but the rate of heat production will vary inversely as the speed. In addition to the retarding effect of the braking system a braking effect is constantly present that depends on the tractive resistance of the vehicle at various speeds and on the engine itself. Wind resistance and the resistance of the engine when the throttle is closed also produce retarding effects that assist in the work of braking.
X