A New Combustion System Achieving High Drive Cycle Fuel Economy Improvements in a Modern Vehicle Powertrain

Connected vehicle systems (CVS) are considered in this paper where vehicles exchange information using wireless vehicle-to-vehicle (V2V) communication. The concept of connected cruise control (CCC) is established that allows control design at the level of individual vehicles while exploiting V2V connectivity. Due to its high level of modularity the proposed design can be applied to large heterogeneous traffic systems. The dynamics of a simple CVS is analysed in detail while taking into account nonlinearities in the vehicle dynamics as well as in the controller. Time delays that arise due to intermittencies and packet drops in the communication channels are also incorporated. The results are summarised using stability charts which allow one to select control gains to maintain stability and ensure disturbance attenuation when the delay is below a critical value. ARTICLE HISTORY

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“…Data of a 2011 Chevrolet HHR vehicle [41] are shown together with the parameters used for the range policies (2)- (5).…”

Section: Appendix 1 Parameters Used In This Papermentioning

confidence: 99%

Connected cruise control: modelling, delay effects, and nonlinear behaviour

Orosz

2016

Vehicle System Dynamics

228

119

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“…Fuel economy benefits of over 16% over a US EPA City Driving Cycle with HCCI implementation on a baseline 2.3 l direct-injection (DI) engine with twin-independent variable valve timing (VVT) and exhaust gas recirculation (EGR) have been demonstrated.75 Several other studies have provided insight into the fuel economy benefits of implementing HCCI technology. 74,[76][77][78][79][80] Controlled autoignition (CAI) is another promising combustion technology that allows the full potential of HCCI to be harnessed but with fewer risks in terms of pre-ignition and engine knock. [80][81][82][83] It is worth noting that HCCI, CAI and lowtemperature combustion (LTC) modes at large lead to reduced exhaust gas temperatures, hence reducing the availability of the exhaust gas energy.…”

Section: Managing the Engine's Energy Dissipationmentioning

confidence: 99%

A review of energy consumption, management, and recovery in automotive systems, with considerations of future trends

Chiara

Canova

2013

Proceedings of the Institution of Mechanical Engineers, Part D:

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In response to the current and future energy and environment challenges, the automotive industry is strongly focusing on improving the fuel efficiency of vehicles. Although the electrification of automotive powertrains is clearly the principal path towards sustainable transportation, many opportunities still exist to improve the fuel economy of conventional vehicles. However, some of the technical solutions representing the state of the art in research and advanced development are difficult to benchmark in terms of their potential benefits for fuel consumption improvement. A greater understanding of the fuel energy utilization on the vehicle (here intended as a ‘system’ ) is therefore necessary in order to identify the readily available opportunities for efficiency improvements and, ultimately, to develop automobiles which are more fuel efficient. To this extent, this paper presents a review of the state of the art and technology trends in the field of energy management and recovery for automotive systems, with the primary focus on conventional powertrains. An understanding of the fuel energy utilization and dissipation associated with the vehicle subsystems (the engine, transmission, and chassis) is provided, as well as an overview of the opportunities and potential challenges in improving the fuel economy through system-level energy management, recovery, and harvesting. Finally, an overview of the most important solutions for managing energy dissipation, energy recovery, and harvesting is presented, discussing their potential for fuel economy improvement, technical readiness, and challenges. Wherever possible, projections on fuel economy improvements, based on either experimental data or simulations, are reported to provide opportunity for the assessment and comparison of current and future technologies.

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“…Due to the significant knock mitigation and the ability to ignite highly diluted mixtures, pre-chamber ignition is recently reconsidered for its application in highly efficient automotive SI engines. [114][115][116] The pre-chamber ignition system can be classified into passive and active systems; comprehensive reviews regarding the pre-chamber ignition technologies can be found in Toulson and Alvarez's work. 117,118 The passive pre-chamber spark plug exchanges the gas depending on the pressure difference between the ports of the orifice channels and the inner aerodynamics of the pre-chamber.…”

Section: Pre-chamber Ignitionmentioning

confidence: 99%

Future gasoline engine ignition: A review on advanced concepts

Zheng

2020

International Journal of Engine Research

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To meet the future requirements of fuel economy and exhaust emissions, high-efficiency gasoline engines tend to employ diluted combustion concepts along with intensified charge motion and stratified mixtures. Securing the ignition of such mixtures over the full engine operation range is challenging, because of the lowered mixture reactivity and increased discrepancy of stoichiometry. In recent years, increasing research efforts have been spending on innovations of ignition technologies to tackle the challenges. In this paper, the directions of ignition improvement are highlighted based on the fundamental understanding of the ignition mechanisms. The working principles of the primary types of advanced ignition systems are introduced; and relevant engine and combustion vessel test results are reviewed. The ignition systems are categorized as: (1) high-energy spark ignition, (2) pulsed nanosecond discharge ignition, (3) radio-frequency plasma ignition, (4) laser-induced plasma ignition, and (5) pre-chamber ignition. The advanced ignition systems are commented, regarding the ignition effectiveness and the implementation challenges, according to the literatures and the extensive empirical work at the authors’ laboratory.

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A New Combustion System Achieving High Drive Cycle Fuel Economy Improvements in a Modern Vehicle Powertrain

Cited by 69 publications

References 51 publications

Connected cruise control: modelling, delay effects, and nonlinear behaviour

Connected cruise control: modelling, delay effects, and nonlinear behaviour

A review of energy consumption, management, and recovery in automotive systems, with considerations of future trends

Future gasoline engine ignition: A review on advanced concepts

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