Development of the Combustion System for General Motors' High-Efficiency Range Extender Ecotec Small Gas Engine

Jocsak, Jeffrey; White, David J.; Armand, Cedric; Davis, Richard

doi:10.4271/2015-01-1272

Cited by 23 publications

(12 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…During the design and calibration of the engine hardware and controls, the engine was optimized to meet power and efficiency requirements [6]. The engine control strategy was optimized to use dual cam phasers with cooled external EGR to improve efficiency across the range of engine operation, particularly within the power band of 10kW to 26 kW, which comprised the majority of operation in the Volt vehicle.…”

Section: Engine Featuresmentioning

confidence: 99%

The Next Generation “Voltec” Extended Range EV Propulsion System

Conlon

Blohm

Harpster

et al. 2015

SAE Int. J. Alt. Power.

View full text Add to dashboard Cite

The Chevrolet Volt is an electric vehicle (EV) with extended-range (ER) that is capable of operation on battery power alone, and on power generated by an on-board gasoline engine after depletion of the battery charge. For 2016, GM has developed the next generation of the Volt vehicle and "Voltec" propulsion system.Building on the experience of the first generation Volt, the second generation targeted improved all-electric range, improved charge sustaining fuel economy, and improved performance. All of this was to be accomplished while maintaining the EV character of the first generation Volt which customers clearly valued.This paper describes the next generation "Voltec" system and the realized improvements in efficiency and performance. The features of the propulsion system components, including energy storage, transaxle, electric motors and power electronics, on-board charging, and engine are described and compared with the previous generation. Next, the transaxle powerflow is discussed and operation under typical driving conditions is explained. Finally, system efficiency and performance data, based on component tests, is presented and compared with the previous generation.This system includes a battery pack with greater energy density, a new transaxle with integrated power electronics and motors, and an engine with optimized displacement, direct injection, and other advanced features.As a result of these improvements, the second generation Volt vehicle is projected to achieve a 30% increase in EV range, an 11% improvement in charge sustaining label fuel economy, and improved vehicle performance both as an electric vehicle, and in extended range mode.

show abstract

Section: Engine Featuresmentioning

confidence: 99%

The Next Generation “Voltec” Extended Range EV Propulsion System

Conlon

Blohm

Harpster

et al. 2015

SAE Int. J. Alt. Power.

View full text Add to dashboard Cite

show abstract

“…So the vehicle control system of electric vehicle should provide residual driving distance, drivers can get accurate residual driving distance information real-timely. It can help drivers to manage the driving route, avoid of the residual driving distance anxiety.By analyzing the searched document, the residual driving distance of electric vehicle calculation method described in these document [11]~ [15] cannot provide the whole, suitable for engineering solution.…”

Section: ) Function Description Of Electric Vehicle Residual Drivingmentioning

confidence: 99%

Control Algorithm Development for Electric Vehicle Residual Driving Distance Based on V Model

Lu¹,

Lu²,

Li³

2019

Proceedings of the 2019 International Conference on Modeling, Simulation, Optimization and Numerical Techniques (SMONT 2019)

View full text Add to dashboard Cite

Marketing for electric vehicle is one of the solutions for solving the environment pollution and energy consumption problem. The powertrain control software of electric vehicle as one important core technology gets the attention and investment from main OEMs. The V model development flow is one mainstream software development flow. The steps, advantages and tools, development software for this development flow are introduced here. One important sub function of powertrain control software of electric vehicle, remain driving distance calculation was developed and validated based on this development flow. The tested data can show that, this EV remain driving distance algorithm can calculate accurate value all the time. This value can be a valuable reference for driver to manage route and driving method.

show abstract

“…BMW converted small-displacement two-cylinder ICE used in the BMW C650 GT scooter [21] to be offered as an option for the BMW i3, initially designed as a pure BEV. General Motors has chosen a different way by designing the Voltec powertrain [22,23], formerly known as E-Flex, which includes an all-new four-cylinder Ecotec ICE [24], exclusively for Chevrolet Volt/Opel Ampera. Voltec architecture is similar to a plug-in hybrid (PHEV), but is capable of operation on battery power alone up to 85 km, depending on the driving style, ambient temperature conditions, and climate comfort settings [23].…”

Section: Introductionmentioning

confidence: 99%

“…LPG supply. 2 ICE in Voltec is optimized to operate on three power levels: 10 kW, 17.5 kW and 26 kW[22,24]. 3 Manufacturer data not available.…”

mentioning

confidence: 99%

Empirical Study on the Efficiency of an LPG-Supplied Range Extender for Electric Vehicles

et al. 2019

View full text Add to dashboard Cite

A range extender is an auxiliary power unit, usually consisting of an internal combustion engine and an electric generator, which is used to charge a battery of an electric vehicle in order to increase its range. This paper considers a range extender supplied with liquefied petroleum gas (LPG). The aim is to provide detailed data on thermal efficiency, brake specific fuel consumption (BSFC), and unit emission of carbon dioxide (CO 2 ) in a broad spectrum of range extender operating conditions defined by rotational speed and torque. The experimental investigation has been conducted using a laboratory test stand equipped with an energy dissipation system of adjustable resistance. Measurement results, including fuel flow rate, were processed using custom algorithm for generating maps, i.e., two-dimensional dependencies of the considered parameters on the rotational speed and torque. The maps obtained for LPG supply were compared with those for gasoline supply. The results demonstrated feasibility of LPG-supplied range extender. Its BSFC and thermal efficiency were at a comparable level to those obtained for gasoline supply, but with less CO 2 emission. The empirical data collected has been adopted in the simulation of extended-range electric vehicle in a driving cycle, showing the potential of utilizing the results of this study.Energies 2019, 12, 3528 2 of 23 ( Figure 1). Their principle of operation is same as that of a standard BEVs, with the only difference being that an additional ICE acts as an on-board generator (range extender) to recharge the battery [11]. EREVs operate exclusively as BEVs when battery energy is available and have full performance in electric mode (e.g., top speed, acceleration capability) [12]. This is possible owing to EREV's electric propulsion system and battery sized in such a way that the ICE is not required for vehicle operation as long as battery energy is available [12]. It is therefore preferable to move the vehicle with the use of an electric motor only, i.e., in "zero emission" driving mode, but at the same time, the user is not afraid of running out of battery energy, and so called "range anxiety" (the term was introduced in the late 1990s [13]) is alleviated.Energies 2019, 12, x FOR PEER REVIEW 2 of 25 being that an additional ICE acts as an on-board generator (range extender) to recharge the battery [11]. EREVs operate exclusively as BEVs when battery energy is available and have full performance in electric mode (e.g., top speed, acceleration capability) [12]. This is possible owing to EREV's electric propulsion system and battery sized in such a way that the ICE is not required for vehicle operation as long as battery energy is available [12]. It is therefore preferable to move the vehicle with the use of an electric motor only, i.e., in "zero emission" driving mode, but at the same time, the user is not afraid of running out of battery energy, and so called "range anxiety" (the term was introduced in the late 1990s [13]) is alleviated.

show abstract

Development of the Combustion System for General Motors' High-Efficiency Range Extender Ecotec Small Gas Engine

Cited by 23 publications

References 15 publications

The Next Generation “Voltec” Extended Range EV Propulsion System

The Next Generation “Voltec” Extended Range EV Propulsion System

Control Algorithm Development for Electric Vehicle Residual Driving Distance Based on V Model

Empirical Study on the Efficiency of an LPG-Supplied Range Extender for Electric Vehicles

Contact Info

Product

Resources

About