Criteria

Text:
Display:

Results

Viewing 1 to 30 of 4275
2015-06-08 ...
  • June 8-9, 2015 (8:30 a.m. - 4:30 p.m.) - Troy, Michigan
Training / Education Classroom Seminars
The advent of digital computers and the availability of ever cheaper and faster micro processors have brought a tremendous amount of control system applications to the automotive industry in the last two decades. From engine and transmission systems, to virtually all chassis subsystems (brakes, suspensions, and steering), some level of computer control is present. Control systems theory is also being applied to comfort systems such as climate control and safety systems such as cruise control or collision mitigation systems. This seminar begins by introducing the highly mathematical field of control...
2014-12-11
Event
With the integration of many subsystems, modeling, simulation and systems engineering take on a more important role in the design/development of new vehicle technology
2014-12-11
Event
Power electronics, especially advanced technologies such as GaN, GAAs, and SiC, offer great advantages in increasing the overall system efficiency of xEV systems. This session will explore various technologies and the benefits/challenges facing them.
2014-11-11
Technical Paper
2014-32-0071
Christian Schweikert, David Witt, Dirk Schweitzer, Marco Nicolo, Liu Chen
Abstract The market potential for products such as scooters and small motorcycles is already self-sustaining. However, other applications for small engines can be more fragmented with a wide variety of requirements for the engine control unit. Consequently, the engine control unit can be designed to accommodate more features than are necessary for a given application to cover a broader market. The flip side of this approach is to design the engine control unit for a limited application reducing the market size. Neither approach creates a cost efficient product for the producer. It either supplies the market with an electronic control unit that has features not being utilized (wasted costs) or a unit that has limited capabilities reducing the economies of scale (higher costs). When these designs are developed using discrete components these inefficiencies are exacerbated. Integration of these functions at the semiconductor level can mitigate these costs, improve the thermal performance and expand the functional capabilities to include additional vehicular control aspects in the electronic control unit.
2014-10-23
WIP Standard
ARP1199C
This Aerospace Recommended Practice provides technical and application information needed by the designers of aircraft electric systems and support equipment for the selection of overcurrent protective devices. It provides definitions to permit comparisons of various electric circuit protective devices. Included also are recommended procedures for periodic inspection.
2014-10-13
Technical Paper
2014-01-2590
Yuanzhe Zhong, Sahil Sane
Abstract Electronic controls in internal combustion engines require an in-cylinder combustion sensor to produce a feedback signal to the ECU (Engine Control Unit). Recent research indicated that the ion current sensor has many advantages over the pressure transducer, related mainly to lower cost. Modified glow plugs in diesel engines, and fuel injectors in both gasoline and diesel engines can be utilized as ion current sensors without the addition any part or drilling holes in the cylinder head needed for the pressure transducer. Multi sensing fuel injector (MSFI) system is a new technique which instruments the fuel injector with an electric circuit to perform multiple sensing tasks including functioning as an ion sensor in addition to its primary task of delivering the fuel into the cylinder. It is necessary to fundamentally understand MSFI system. In this study the author will firstly explore the influence of piston motion (as one side of variable capacitance) on the ion sensor signal through modeling and simulation, and then look into the origin of the MSFI signal of fuel injection; and finally the author will look at how to analyze MSFI signal to duplicate the injection command profile for on-board diagnostics (OBD).
2014-10-13
Technical Paper
2014-01-2584
Krisada Wannatong, Sompach Kongviwattanakul, Thananchai Tepimonrat, Thanadech Priroon
Abstract End of line test (EOL) of Engine Control Units (ECU) is the process of ECU functions validation before releasing ECUs to the car assembly process. Examples of ECU function that need to be validated are idle control, air path control and faults manager function. To perform EOL, a vehicle and a chassis dynamometer are used to enable control functions validation inside the ECU. However, this poses high operating cost and long setup time. This paper presents the development of Hardware-in-the-Loop (HiL) system, which imitates real vehicle behavior on a chassis dynamometer. The diesel high pressure pump model was developed using an empirical dynamic modeling approach. The engine model was developed using AVL BOOST RT software, an engine cycle simulation modeling approach. The vehicle model was developed using AVL CRUISE software. In order to interface the engine and vehicle models with the ECU, HiL system was implemented. In the new EOL process, the vehicle was operated following the Extra Urban Driving Cycle (EUDC) including short engine idling time.
2014-10-13
Technical Paper
2014-01-2707
Brian C. Kaul, Benjamin J. Lawler, Charles E.A. Finney, Michelle L. Edwards, Robert M. Wagner
Abstract Advances in engine controls and sensor technology are making advanced, direct, high-speed control of engine combustion more feasible. Control of combustion rate and phasing in low-temperature combustion regimes and active control of cyclic variability in dilute SI combustion are being pursued in laboratory environments with high-quality data acquisition systems, using metrics calculated from in-cylinder pressure. In order to implement these advanced combustion controls in production, lower-quality data will need to be tolerated even if indicated pressure sensors become available. This paper examines the effects of several data quality issues, including phase shifting (incorrect TDC location), reduced data resolution, pressure pegging errors, and random noise on calculated combustion metrics that are used for control feedback. Symbolic data analysis is an effective technique for identifying underlying patterns in noisy data, and has been applied to cyclic variability of dilute SI combustion, identifying deterministic effects that underlie the stochastic variations that are present.
2014-10-13
Technical Paper
2014-01-2613
Mario Farrugia, Andrew Briffa, Michael Farrugia
Abstract A conversion to LPG of a SI engine that was originally carbureted gasoline is reported in this work. The conversion was implemented on a 1988 Skoda 120L with a 1174cc rear engine. The conversion to run on Liquefied Petroleum Gas (LPG) was carried out using a programmable Engine Control Unit (ECU) that operated a single point fuel injection system. The LPG used was a commercially available mixture of butane and propane. The fuel injection system was designed to operate with the LPG in the liquid state. A circulating pump was used to maintain availability of LPG in liquid state at the inlet to the fuel injector. This made possible the use of similar fuel injection parts as in a gasoline system. Injection of the fuel in the liquid state provided cooling to the intake air as measured during driving of the vehicle and also on chassis dynamometer runs. Engine power output measured on the chassis dynamometer showed equal power between gasoline and LPG around mid RPM of 2500 RPM with a slight decline (4%) in power of the LPG system at 5000 RPM.
2014-10-13
Technical Paper
2014-01-2894
Boru Jia, Zhengxing Zuo, Huihua Feng, Guohong Tian, A. P. Roskilly
Abstract The free-piston engine generator (FPEG) is a novel type of energy conversion device; it integrates a two stroke combustion engine and a linear electric machine into a single unit. As an alternative to conventional engines, the FPEG is a promising power generation system due to its simplicity and high thermal efficiency and has attracted considerable research interests recently. This paper presents the development for a spark-ignited free-piston engine generator prototype, and the design of major sub-systems is introduced. The electrical linear machine is operated as a motor to start the engine and switched to a generator after successful ignition. Ignition is one of the most crucial problems for the generating process, thus a unique control sub-system to generate ignition signals at the correct ignition timing based on the piston position was completed. Then experiments of the starting process were carried out with the prototype. The results indicate that with a fixed motor force of 110N, the maximum in-cylinder gas pressure can reach 12 bar and the compression ratio can reach 8:1.
2014-10-09
Event
Early exhaust valve opening (EEVO) is a strategy to increase turbine out temperatures (TOT) for exhaust aftertreatment thermal management; however, it also results in an increase in the required fueling to maintain a particular brake torque. This study outlines experimental results of the impact of EEVO on exhaust temperature (measured at the turbine outlet) and required fueling. Several EEVO sweeps were performed on a diesel engine using a fully-flexible variable valve actuation (VVA) system. Experimental data was taken at three speed/load conditions with varied fuel injection and air handling parameters. EEVO was studied for nominal exhaust valve opening (EVO) timing to 90 crank angles early. The results show that TOT is observed to increase by 30C to 80C. However, brake thermal efficiency (BTE) reductions observed are between 10-20% from the BTE at nominal valve timing. It is shown that while EEVO negatively affects the power output during the expansion stroke, at a constant brake torque (with additional fueling), EEVO has no significant effect on the gross indicated power.
2014-10-09
Event
Cylinder deactivation (CDA) at idle conditions results in a reduction in air-to-fuel ratio, and heat transfer surface area. This enables an increase in exhaust temperature for aftertreatment thermal management, and an increase in efficiency via reduced pumping and heat transfer losses. This study focuses on the impact of 3-cylinder CDA on exhaust temperature and efficiency at both loaded and unloaded idle conditions. At the loaded condition, deactivating 3 cylinders provides an increase in exhaust temperature from about 200C (6-cylinders) to approximately 300C (3-cylinders), with no fuel economy penalty. Additionally, at the unloaded condition, CDA provides an increase in exhaust temperature of about 20C, from about 117C to about 135C, with a fuel consumption reduction of 15%-26%.
2014-10-09
Event
This session covers advanced technologies and analysis/design/testing techniques related to powertrain performance, emissions, and electronic controls. It includes both system-level and component-level contents such as engine system design and integration optimization. Typical topics include emissions, fuel economy, combustion, air charging, EGR systems, fuel systems, valvetrains, engine brakes, waste heat recovery, calibration, steady-state and transient performance, engine/powertrain/drivetrain controls, model-based controls, sensors, OBD, and HIL. The topics of engine applications cover on-road, off-road, heavy-duty, and light-duty.
2014-10-09
Event
This session covers advanced technologies and analysis/design/testing techniques related to powertrain performance, emissions, and electronic controls. It includes both system-level and component-level contents such as engine system design and integration optimization. Typical topics include emissions, fuel economy, combustion, air charging, EGR systems, fuel systems, valvetrains, engine brakes, waste heat recovery, calibration, steady-state and transient performance, engine/powertrain/drivetrain controls, model-based controls, sensors, OBD, and HIL. The topics of engine applications cover on-road, off-road, heavy-duty, and light-duty.
2014-10-09
Event
This session covers advanced technologies and analysis/design/testing techniques related to powertrain performance, emissions, and electronic controls. It includes both system-level and component-level contents such as engine system design and integration optimization. Typical topics include emissions, fuel economy, combustion, air charging, EGR systems, fuel systems, valvetrains, engine brakes, waste heat recovery, calibration, steady-state and transient performance, engine/powertrain/drivetrain controls, model-based controls, sensors, OBD, and HIL. The topics of engine applications cover on-road, off-road, heavy-duty, and light-duty.
2014-09-30
Technical Paper
2014-01-2421
Massimiliano Ruggeri, Carlo Ferraresi, Luca Dariz, Giorgio Malaguti
Abstract Functional safety requirements and solutions are more expensive when it comes to lower cost machines with less power but same functionalities with respect to big machines. The paper will show a real Electronic Control Unit (ECU) design of a machine controller, controlling both engine working point, transmission, and other utilities like PTO, 4WD, brakes and Differential Lock; the ECU was designed in accordance to ISO 25119 regulation, to meet AgPL = C or even D for some functionalities. The unit is a fully redundant electronic control unit with two CAN networks and some special safe state oriented mechanism, that allow the Performance Level C with less software analysis requirements compared with traditional solutions. All safety critical sensors are redounded and singularly diagnosable, all command effects are directly observable and most of commands are directly diagnosable. With a minimum extra-cost the hardware category for the most critical controls was brought to the category 4, thus theoretically allowing the Performance Level D achievement.
2014-09-30
Technical Paper
2014-01-2399
Michael Sprengel, Monika Ivantysynova
Abstract A novel Blended Hydraulic Hybrid transmission architecture is presented in this paper with benefits over conventional designs. This novel configuration combines elements of a hydrostatic transmission, a parallel hybrid, and a selectively connectable high pressure accumulator using passive and actively controlled logic elements. Losses are reduced compared to existing series hybrid transmissions by enabling the units to operate efficiently at pressures below the current high pressure accumulator's pressure. A selective connection to the high pressure accumulator also allows for higher system precharge which increases regenerative braking torque and energy capture with little determent to system efficiency. Finally operating as a hydrostatic transmission increases transmission stiffness (i.e. driver response) and may improve driver feel in certain situations when compared to a conventional series hybrid transmission. To explore the novel blended hybrid architecture six transmissions were modeled and simulated.
2014-09-30
Technical Paper
2014-01-2324
Antoine Delorme, Jason L. Robert, William Eli Hollowell, Andre M. Strobel, Jason T. Krajewski
Abstract In the recent years, Automated Manual Transmissions have become more popular for class 8 heavy trucks. Besides the benefits of smoother gear changes and reduced driver fatigue, AMTs can also greatly reduce fuel consumption by using optimized shifting strategies and advanced controls. The Detroit DT12 AMT demonstrated its ability to save fuel over a standard AMT, due in part to its eCoast feature. eCoast relies on intelligent and advanced electronic controls to safely allow the vehicle to coast on downgrades. While the engine is idling, the drag parasitic energy losses are decreased and the vehicle can fully use its momentum to travel further up and down hill. As one could expect, the type of route profile can greatly affect the fuel savings due to eCoast, since more hilly terrains might offer more opportunities to activate eCoast than flatter roads. In addition, when combined with different vehicle and driving parameters such as vehicle weight and driver desired cruise set speed, the fuel consumption reduction of eCoast is always there, but becomes a more complicated function.
2014-09-28
Technical Paper
2014-01-2527
Gunn Hwang, Axel Freiwald, Hyun-Sik Ahn
Abstract Currently major investments by Tier1 and vehicle manufacturers are made to implement and optimize safety critical automotive systems according to the ISO standard 26262 “Road vehicles functional safety”. The ISO 26262 standard describes methods to detect the safety critical faults of a system designed according to the rules of functional safety, but it does not describe how an actual implementation shall look like. Development of ISO 26262 standard compliant systems concentrates on optimizing and improving cost and performance in a competitive environment. More competitive and practical implementations use fewer additional hardware and software resources for safety control and error detection and have higher performance with less overhead. Microcontrollers already have implemented many safety related hardware functions, so called safety mechanisms to mitigate safety critical risks. Depending on how these safety mechanisms are used, functional safety compliant system can get optimized for cost and performance.
2014-09-28
Technical Paper
2014-01-2524
Chendi Sun, Xiaofei Pei
Abstract This paper presents how hardware-in-the-loop (HIL) simulations have been used for testing during the development of ABS (Anti-lock Braking System). The Labcar system of ETAS is a popular tool for HIL tests. The vehicle model which is built in Matlab/Simulink is downloaded to run in RTPC (Real-time PC). The Labcar software, Integration Platform (IP), can configure boards which is a link between the model and ABS ECU. In this paper, a classical logic threshold control algorithm is adopted in ABS ECU. Through Labcar Experiment Environment (EE) various parameters can be monitored and modified conveniently. The HIL test of ABS ECU is implemented on high or low - adhesion road respectively. The results show that, although response lag exists in the hydraulic braking system, the curves of velocity and pressure in wheel cylinders can be close to those on real road with proper adjustment of control parameters. So HIL simulations are invaluable, when considering the short development time required in the automotive industry.
2014-09-25
Standard
J2399_201409
Adaptive cruise control (ACC) is an enhancement of conventional cruise control systems that allows the ACC-equipped vehicle to follow a forward vehicle at a pre-selected time gap, up to a driver selected speed, by controlling the engine, power train, and/or service brakes. This SAE Standard focuses on specifying the minimum requirements for ACC system operating characteristics and elements of the user interface. This document applies to original equipment and aftermarket ACC systems for passenger vehicles (including motorcycles). This document does not apply to heavy vehicles (GVWR > 10,000 lbs. or 4,536 kg). Furthermore, this document does not address other variations on ACC, such as "stop & go" ACC, that can bring the equipped vehicle to a stop and reaccelerate. Future revisions of this document should consider enhanced versions of ACC, as well as the integration of ACC with Forward Vehicle Collision Warning Systems (FVCWS).
Viewing 1 to 30 of 4275

Filter

  • Range:
    to:
  • Year: