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Neural Network Based Virtual Sensor for Throttle Valve Position Estimation in a SI Engine

SITAMS-Chellappan Kavitha
VIT University-Bragadeshwaran Ashok, Sathiaseelan Denis Ashok, Chidambaram Ramesh Kumar
Published 2019-10-11 by SAE International in United States
Electronic throttle body (ETB) is commonly employed in an intake manifold of a spark ignition engine to vary the airflow quantity by adjusting the throttle valve in it. The actual position of the throttle valve is measured by means of a dual throttle position sensor (TPS) and the signal is feedback into the control unit for accomplishing the closed loop control in order handle the nonlinearities due to friction, limp-home position, aging, parameter variations. This work aims presents a neural networks based novel virtual sensor for the estimation of throttle valve position in the electronic throttle body. Proposed neural network model estimates the actual throttle position using three inputs such as reference throttle angle, angular error and the motor current. In the present work, the dynamic model of the electronic throttle body is used to calculate the current consumed by the motor for corresponding throttle valve movement. Proposed virtual sensor is tested for the sinusoidal and random driving cycle throttle angle input using a Bosch DVE5 electronic throttle body. Estimated throttle valve angle using the…
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Snowmobile Throttle Control Systems

Snowmobile Technical Committee
  • Ground Vehicle Standard
  • J92_201906
  • Current
Published 2019-06-06 by SAE International in United States
This SAE Recommended Practice is intended to provide the minimum acceptable criteria for snowmobile hand throttle control systems. This recommendation is not intended to cover competition vehicles, nor is it intended to limit development of new and/or improved technology in controls. Although these recommendations are primarily addressed to hand-control systems using an outer flexible conduit with a multiple strand inner cable, the basic requirements of freedom of movement, strength, material, etc., will apply to any system.
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Investigation on the Transient Behavior of a Two-Wheeler Single Cylinder Engine Close to Idling with Electronic Throttle Control

Robert Bosch GmbH-Henning Heikes, Alexander Pelkmann, Alrik Barton
Published 2018-10-30 by SAE International in United States
The introduction of new emission legislation and the demand of increased power for small two-wheelers lead to an increase of technical requirements. Especially for single cylinder engines with high compression ratio the transient behavior close to idling is challenging.The demand for two-wheeler specific responsiveness of the vehicle requires low overall rotational inertia as well as small intake manifold volumes. The combination with high compression ratio can lead to a stalling of the engine if the throttle opens and closes very quickly in idle operation. The fast opening and closing of the throttle is called a throttle blip. Fast, in this context, means that the blipping event can occur in one to two working cycles.Previous work was focused on the development of a procedure to apply reproducible blipping events to a vehicle in order to derive a deeper physical understanding of the stalling events. The corresponding investigations were performed on a motorcycle with a mechanical throttle body. Based on this the present paper is focused on a comparison to a motorcycle with the same base engine…
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Closed Loop Throttle Opening Angle Estimation Strategy by Considering Torque Demands from SI Engine

Department of ECE, SITAMS, Chittoor, AP-C Kavitha
VIT University, Vellore, India-Ashok B, S Denis Ashok
Published 2018-07-09 by SAE International in United States
Electronic throttle control is extensively preferred to vary the air intake in the engine manifold for regulating the torque in order to obtain the better vehicle response, high performance in terms of improving the fuel economy and trim down the emissions of the spark ignition engines. For such type of the engine control systems the throttle angle is estimation is accomplished either by pedal follower or torque based method. This work aims to develop a throttle opening angle estimation strategy in a closed loop manner using fuzzy logic approach by considering real time internal system and driver torque demands for controlling the SI engine. In present work the torque demand from internal system such as catalyst heating, cold start assist and battery voltage compensation is estimated using fuzzy logic strategy. Such intelligent system aims to replace the lookup tables associated with those systems and reduces the calibration effort. For the estimated throttle angle the electronic throttle body is evaluated in an engine test bed simulation on Matlab Simulink platform for the various accelerator pedal inputs…
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Active Safety System Sensors

Active Safety Systems Standards Committee
  • Ground Vehicle Standard
  • J3088_201711
  • Current
Published 2017-11-30 by SAE International in United States
The current document is a part of an effort of the Active Safety Systems Committee, Active Safety Systems Sensors Task Force whose objectives are to: a Identify the functionality and performance you could expect from active safety sensors b Establish a basic understanding of how sensors work c Establish a basic understanding of how sensors can be tested d Describe an exemplar set of acceptable requirements and tests associated with each technology e Describe the key requirements/functionality for the test targets f Describe the unique characteristics of the targets or tests This document will cover items (a) and (b).
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For ’18 models, GM quietly backs diesel-with quiet new diesel

Automotive Engineering: October 2017

Paul Weissler
  • Magazine Article
  • 17AUTP10_14
Published 2017-10-01 by SAE International in United States

When Volkswagen fell afoul of U.S. and European emissions rules, it effectively stripped the U.S. car market of small turbodiesels for passenger vehicles. While Mazda is still certifying its 2.2-L Skyactiv-D for the CX-5 (now expected on sale in spring 2018), General Motors is ready to fill the void. Its all-new 1.6-L turbodiesel, a $2,200 option for the 2018 Chevrolet Cruze and Equinox and GMC Terrain, was engineered four years ago in Italy, is built in Hungary and was calibrated in Detroit for the hitherto-abandoned market.

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Active Muffler for Single Cylinder Engine, Using Electronic Throttle Control for Formula Student Cars

SRM University-Vellavedu Velumani Praveen, P Baskara Sethupathi
Published 2017-07-10 by SAE International in United States
Formula SAE is a prestigious engineering design competition, where student team design, fabricate and test their formula style race car, with the guidelines of the FSAE rulebook, according to which the car is designed, for example the engine must be a four-stroke, Otto-cycle piston engine with a displacement no greater than 710cc.According to FSAE 2017 Rule Book [1], ARTICLE 3, IC3.2 and IC3.3 state that the maximum sound level should not exceed 110 dBC at an average piston speed of 15:25 m/s (for the KTM 390 engine, which has 60 mm stroke length, the noise level will be measured at 7500 RPM) and 103 dBC at Idle RPM. So, the active muffler which works as a normal reflective muffler till the 7500 RPM range, after which an electronic controlled throttle mechanism is used to reduce the backpressure (since after 7500 RPM the noise level doesn't matter in FSAE) by using tach signal from the engine to control the throttle (two position). The electronic throttle will be controlled using an ardino board and control the backpressure,…
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SUPPLIER EYE

Automotive Engineering: May 2017

  • Magazine Article
  • 17AUTP05_08
Published 2017-05-01 by SAE International in United States

Toward a “by wire” vehicle

When President Kennedy proclaimed in 1961 that the U.S. would put a man on the moon by 1969, the engineers and scientists involved knew that building the delivery systems had to be a staged process of constant improvement. Creating the knowledge base, supplier capability, test regimens and importantly, the experience and reliability, were all tightly defined through the Mercury, Gemini and Apollo programs. Skipping a step or shortcutting any development phase would have resulted in failure.

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Robust Model-Based Discrete Sliding Mode Control of an Automotive Electronic Throttle Body

SAE International Journal of Commercial Vehicles

Michigan Tech University-Mohammad Reza Amini, Meysam Razmara, Mahdi Shahbakhti
  • Journal Article
  • 2017-01-0598
Published 2017-03-28 by SAE International in United States
Electronic throttle control is an integral part of an engine electronic control unit (ECU) that directly affects vehicle fuel economy, drivability, and engine-out emissions by managing engine torque and air-fuel ratio through adjusting intake charge flow to the engine. The highly nonlinear dynamics of the throttle body call for nonlinear control techniques that can be implemented in real-time and are also robust to controller implementation imprecision. Discrete sliding mode control (DSMC) is a computationally efficient controller design technique which can handle systems with high degree of nonlinearity. In this paper, a generic robust discrete sliding mode controller design is proposed and experimentally verified for the throttle position tracking problem. In addition, a novel method is used to predict and incorporate the sampling and quantization imprecisions into the DSMC structure.First, a nonlinear physical model for an electromechanical throttle body is derived. Parameters of the model are determined using techniques of model/parameter identification. Next, a DSMC is formulated for controlling the throttle position. The performance of the DSMC is examined under different sampling and quantization levels via…
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Cat 14M3 ‘most technologically advanced’ motor grader for construction

SAE Truck & Off-Highway Engineering: February 2017

Ryan Gehm
  • Magazine Article
  • 17TOFHP02_11
Published 2017-02-01 by SAE International in United States

Caterpillar plans to showcase 40 machines at ConExpo-Con/Agg 2017 in March, one being its new 14M3 motor grader that features a larger engine, increased power to ground, and a host of integrated technology solutions such as the newly patented Stable Blade anti-bounce system, to increase operator efficiency and boost productivity levels.

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