Abstract
Gasoline direct injection (GDI) engines are currently the dominant powertrains for passenger cars. With the implementation of increasingly stringent fuel consumption and emission regulations worldwide, GDI engines are facing challenges owing to high particulate matter emissions and a tendency to knock, leading to a change in the research and design (R&D) issues compared with those in the twentieth century. This paper reviews the progress in research regarding GDI engine technologies over the past 20 years, focusing on combustion system configurations, and also highlights common issues in GDI R&D, including pre-ignition and deto-knock, soot formation and PM emissions, injector deposits and gasoline compression ignition (GCI). First, an overview of recent developments in the field as driven by regulations is provided, following which progress in injection and combustion systems is examined. Third, the review addresses the occurrence and mechanism of deto-knock and considers means of suppressing this phenomenon. The fourth section discusses soot formation mechanisms and particulate matter emission characteristics of GDI engines and describes the application of gasoline particulate filter (GPF) after-treatment. The subsequent section summarizes studies regarding injector deposit formation, as well as pioneering research into GCI combustion modes. Finally, a summary and future prospects for GDI engine technologies are provided.
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Abbreviations
- AI:
-
Artificial intelligence
- BDC:
-
Bottom dead center
- BMEP:
-
Brake mean effective pressure
- BSFC:
-
Brake specific fuel consumption
- BTE:
-
Brake thermal efficiency
- CAFC:
-
Corporate average fuel consumption
- CGPF:
-
Coated gasoline particulate filter
- CTE:
-
Coefficient of thermal expansion
- COV:
-
Coefficient of variance
- CR:
-
Compression ratio
- DI:
-
Direct injection
- DISI:
-
Direct injection spark ignition
- DPF:
-
Diesel particulate filter
- EGR:
-
Exhaust gas recirculation
- EIVC:
-
Early intake valve closing
- GCI:
-
Gasoline compression ignition
- GDCI:
-
Gasoline direct compression ignition
- GDI:
-
Gasoline direct injection
- GPF:
-
Gasoline particulate filter
- HCCI:
-
Homogeneous charge compression ignition
- ITE:
-
Indicated thermal efficiency
- LIVC:
-
Late intake valve closing
- LSPI:
-
Low-speed pre-ignition
- MPCI:
-
Multiple premixed compression ignition
- MPI:
-
Multiple point injection
- NA:
-
Natural aspirated
- NEDC:
-
New European driving cycle
- PFI:
-
Port fuel injection
- PM:
-
Particulate matter
- PN:
-
Particle number
- PPCI:
-
Partially premixed compression ignition
- RCM:
-
Rapid compression machine
- RON:
-
Research octane number
- SMD:
-
Sauter mean diameter
- SPCCI:
-
Spark-controlled compression ignition
- TDC:
-
Top dead center
- THC:
-
Total hydrocarbon
- TWC:
-
Three way catalyst
- VCR:
-
Variable compression ratio
- VVT:
-
Variable valve timing
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Acknowledgements
The authors acknowledge the China National Natural Science Foundation Project “Formation and Evolution of PM from GDI Engines: From Primary Particles to Secondary Aerosols” (Grant No. 51636003), and the National Key R&D Plan Project “Integration Technology of PM Capture and Clean Emissions for GDI Vehicles” (Grant No. 2017YFC02110004). The authors also wish to thank their colleagues Prof. Jianxin Wang and Prof. Zhi Wang as well as Ph.D. students Shuai Liang, Zhou Zhang, Wenbin Zhang, Zexian Guo and Hengjie Guo for their contributions to this review.
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Shuai, S., Ma, X., Li, Y. et al. Recent Progress in Automotive Gasoline Direct Injection Engine Technology. Automot. Innov. 1, 95–113 (2018). https://doi.org/10.1007/s42154-018-0020-1
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DOI: https://doi.org/10.1007/s42154-018-0020-1