Zhang, Y., Zhao, H., Ojapah, M. and Cairns, A. (2011) 'Experiment and analysis of a direct injection gasoline engine operating with 2-stroke and 4-stroke cycles of spark ignition and controlled auto-ignition combustion'. SAE Technical Papers.

Chen, T., Xie, H., Li, L., Yu, W., Li, Z. and Zhao, H. (2011) 'Continuous load adjustment strategy of a gasoline HCCI-SI engine fully controlled by exhaust gas'. SAE Technical Papers.

Lee, CY., Zhao, H. and Ma, T. (2011) 'Pneumatic regenerative engine braking technology for buses and commercial vehicles'. SAE International Journal of Engines, 4 (3). pp. 2687 - 2698. ISSN: 1946-3936

Zhao, H., Psanis, C., Ma, T., Turner, J. and Pearson, R. (2011) 'Theoretical and experimental studies of air-hybrid engine operation with fully variable valve actuation'. International Journal of Engine Research, 12 (6). pp. 527 - 548. ISSN: 1468-0874

Herfatmanesh, MR., Zhao, H. and Ganippa, L. (2011) 'In-cylinder studies of split injection in a single cylinder optical diesel engine', inInternal Combustion Engines: Improving Performance, Fuel Economy and Emissions. pp. 99 - 109.

Zhang, Y., Zhao, H., Ojapah, M. and Cairns, A. (2011) 'Analysis of CAI/HCCI combustion in a 2-stroke poppet valve engine'. Institution of Mechanical Engineers - Internal Combustion Engines: Improving Performance, Fuel Economy and Emissions. pp. 127 - 134.

Ojapah, M., Zhang, Y., Zhao, H. and Ganippa, L. (2011) 'Particulate matter emission from different combustion modes in a 2/4 stroke switchable direct injection gasoline engine', inInternal Combustion Engines: Improving Performance, Fuel Economy and Emissions. pp. 75 - 83.

Xia, J., Luo, KH. and Zhao, H. (2011) 'Dynamic large-eddy simulation of droplet effects on a reacting plume in countercurrent configuration'. Combustion Science and Technology, 183 (5). pp. 487 - 518. ISSN: 0010-2202

Yang, C. and Zhao, H. (2011) 'In-cylinder studies of CAI/HCCI combustion with negative valve overlap in a direct injection gasoline optical engine'. Combustion Science and Technology, 183 (5). pp. 467 - 486. ISSN: 0010-2202

Zhao, H., Psanis, C. and Ma, T. (2011) 'Analysis of an air hybrid engine concept with an energy recovery valve'. International Journal of Vehicle Design, 55 (1). pp. 49 - 75. ISSN: 0143-3369

Herfatmanesh, MR., Zhao, H. and Ganippa, L. (2011) 'In-cylinder studies of split injection in a single cylinder optical diesel engine'.Conference on Internal Combustion Engines - Improving Performance, Fuel Economy and Emissions. London, ENGLAND. 1 - 30 November. Elsevier. pp. 99 - 109.

Zhang, Y., Zhao, H., Ojapah, M. and Cairns, A. (2011) 'Effects of injection timing on CAI operation in a 2/4-stroke switchable GDI engine'. SAE Technical Papers.

Cairns, A., Zhao, H., Zhang, Y. and Ojapah, M. (2011) 'Experiment and Analysis of a Direct Injection Gasoline Engine Operating with 2-stroke and 4-stroke Cycles of Spark Ignition and Controlled Auto-Ignition Combustion'.JSAE ANNUAL CONGRESS. SAE International. ISSN: 0148-7191

Chen, T., Xie, H., Li, L., Yu, W., Li, Z. and Zhao, H. (2011) 'Continuous load adjustment strategy of a gasoline HCCI-SI engine fully controlled by exhaust gas'.SAE 2011 World Congress & Exhibition. SAE International. ISSN: 0148-7191

Ojapah, M., Zhang, Y., Zhao, H. and Ganippa, L. (2011) 'Particulate matter emission from different combustion modes in a 2/4 stroke switchable direct injection gasoline engine'.Conference on Internal Combustion Engines - Improving Performance, Fuel Economy and Emissions. London, ENGLAND. 1 - 30 November. Elsevier. pp. 75 - 83.

Bai, SZ., Zhao, H. and Li, GX. (2010) 'Two-dimensional gas-phase temperature measurements in engine using laser-induced phosphorescence thermometry'. Ranshao Kexue Yu Jishu/Journal of Combustion Science and Technology, 16 (6). pp. 515 - 518. ISSN: 1006-8740

Yang, CH. and Zhao, H. (2010) 'In-cylinder studies of hybrid combustion in a direct injection single-cylinder optical engine'. International Journal of Engine Research, 11 (6). pp. 515 - 531. ISSN: 1468-0874

Zhang, Y., Zhao, H., Xie, H. and He, BQ. (2010) 'Variable-valve-actuation-enabled high-efficiency gasoline engine'. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 224 (8). pp. 1081 - 1095. ISSN: 0954-4070

Li, N., Xie, H. and Zhao, H. (2010) 'Effect of the temperature inhomogeneity on the auto-ignition based on an exhaust gas management gasoline engine'. Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics, 31 (8). pp. 1419 - 1422. ISSN: 0253-231X

Diez, A. and Zhao, H. (2010) 'Effect of the dwell angle of split injection in a single-cylinder optical diesel engine'. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 224 (6). pp. 815 - 828. ISSN: 0954-4070

Yang, C., Theinnoi, K., Hemmings, S., Megaritis, A., Tsolakis, A. and Zhao, H. (2010) 'Periodically Regenerating Diesel Particulate Filter with Hydrogen Addition: Towards a Fuel Reformer – Diesel Engine Aftertreatment System'.FISITA 2010 World Automotive Congress. Budapest, Hungary. 30 - 4 June. Woodhead Publishing Limited. pp. 235 - 244.

Tongroon, M. and Zhao, H. (2010) 'Combustion characteristics of CAI combustion with alcohol fuels'.SAE 2010 World Congress & Exhibition: Kinetically Controlled CI Combustion and Controls. SAE International. pp. Paper number 2010-01-0843 - Paper number 2010-01-0843. ISSN: 0148-7191 Open Access Link

Diez, A. and Zhao, H. (2010) 'Investigation of split injection in a single cylinder optical diesel engine'.SAE World Congress and Exhibition. Detroit, MI, USA. 12 SAE International. ISSN: 0148-7191 Open Access Link

Lee, CY., Zhao, H. and Ma, T. (2010) 'A low cost air hybrid concept'. Oil and Gas Science and Technology - Revue d'IFP Energies Nouvelles, 65 (1). pp. 19 - 26. ISSN: 1294-4475 Open Access Link

Lee, CY., Zhao, H. and Ma, T. (2010) 'A low cost air hybrid concept'. Oil and Gas Science and Technology, 65 (1). pp. 19 - 26. ISSN: 1294-4475

Lee, CY., Zhao, H. and Ma, T. (2010) 'The performance characteristics of an production oriented air hybrid powertrain'. SAE Technical Papers, 3 (1). pp. 609 - 619. ISSN: 0148-7191

Li, N., Xie, H., Shen, M. and Zhao, H. (2010) 'CFD study on effects of thermal and residual gas inhomogeneous distribution on auto-ignition of gasoline HCCI combustion'.SAE 2010 World Congress & Exhibition. SAE International. ISSN: 0148-7191

Zhao, H. (2009) 'Advanced direct injection combustion engine technologies and development: Diesel engines'. Cambridge, UK: Woodhead Publishing Limited. ISSN 10: 1 84569 744 8 ISSN 13: 978 1 84569 744 0

Zhao, H. (2009) 'Overview of gasoline direct injection engines', inAdvanced Direct Injection Combustion Engine Technologies and Development: Gasoline and Gas Engines. pp. 1 - 19.

Zhao, H. (2009) 'Direct injection gasoline engines with autoignition combustion', inAdvanced Direct Injection Combustion Engine Technologies and Development: Gasoline and Gas Engines. pp. 133 - 165.

Zhao, H. (2009) 'Advanced direct injection combustion engine technologies and development: Gasoline and gas engines'. Cambridge, UK: Woodhead Publishing Limited. ISSN 10: 1 84569 389 2 ISSN 13: 978 1 84569 389 3

Yang, C., Zhao, H. and Megaritis, A. (2009) 'Investigation of CAI Combustion with Positive Valve Overlap and Enlargement of CAI Operating'.SAE World Congress 2009. Detroit, USA. 20 - 23 April. SAE International. ISSN: 0148-7191

Yang, C., Zhao, H. and Megaritis, A. (2009) 'In-cylinder studies of CAI Combustion with Negative Valve Overlap and Simultaneous Chemiluminescence Analysis'.SAE World Congress 2009. Detroit, USA. 20 - 23 April. SAE International. ISSN: 0148-7191

Zhao, H. and Ganippa, L. (2009) 'Laser Induced Incandescence (LII)', in Lackner, M. (ed.) Laser diagnostics in combustion. pp. 77 - 118. ISBN 10: 3902655038. ISBN 13: 9783902655035.

Bai, S., Li, G., Zhao, H. and Williams, DJR. (2009) 'Experiment Study of Stratified Combustion at Different Boost Pressure'.Asia-Pacific Power and Energy Engineering Conference (APPEEC). Wuhan, PEOPLES R CHINA. 1 - 31 March. IEEE. pp. 280. ISSN: 2157-4839

Kalian, N., Zhao, H. and Yang, C. (2009) 'Effects of spark-assistance on controlled auto-ignition combustion at different injection timings in a multicylinder direct-injection gasoline engine'. International Journal of Engine Research, 10 (3). pp. 133 - 148. ISSN: 1468-0874

Jagus, K., Jiang, X., Dober, G., Greeves, G., Milanovic, N. and Zhao, H. (2009) 'Assessment of large-eddy simulation feasibility in modelling the unsteady diesel fuel injection and mixing in a high-speed direct-injection engine'. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 223 (8). pp. 1033 - 1048. ISSN: 0954-4070

Lee, CY., Zhao, H. and Ma, T. (2009) 'Analysis of a cost effective air hybrid concept'.SAE World Congress & Exhibition. SAE International. ISSN: 0148-7191

Zhao, H. and He, BQ. (2008) 'High efficiency and low emission powertrain technologies for passenger cars'. Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines), 26 (SUPPL.). pp. 68 - 76. ISSN: 1000-0909

Kalian, N., Zhao, H. and Qiao, J. (2008) 'Investigation of transition between spark ignition and controlled auto-ignition combustion in a V6 direct-injection engine with cam profile switching'. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 222 (10). pp. 1911 - 1926. ISSN: 0954-4070 Open Access Link

Kalian, N. and Zhao, H. (2008) 'Effects of extended exhaust and intake duration on CAI combustion in a multi-cylinder di gasoline engine'. Institution of Mechanical Engineers: Combustion Engines and Fuels Group - Internal Combustion Engines: Performance, Fuel Economy and Emissions. pp. 303 - 315.

McWilliam, L., Megaritis, A. and Zhao, H. (2008) 'Experimental Investigation of the Effects of Combined Hydrogen and Diesel Combustion on the Emissions of a HSDI Diesel Engine'.SAE International Powertrains, Fuels and Lubricants Congress. Shanghai, China. 25 - 25 June. SAE International. ISSN: 0148-7191

Li, Y., Zhao, H. and Brouzos, N. (2008) 'CAI combustion with methanol and ethanol in an air-assisted direct injection SI engine'.SAE International Powertrains, Fuels and Lubricants Congress. Shanghai, China. 23 SAE International. ISSN: 0148-7191 Open Access Link

Cao, L., Zhao, H. and Jiang, X. (2008) 'Analysis of controlled auto-ignition/HCCI combustion in a direct injection gasoline engine with single and split fuel injections'. Combustion Science and Technology, 180 (1). pp. 176 - 205. ISSN: 0010-2202 Open Access Link

Zhao, H. and Zhang, S. (2008) 'Quantitative measurements of in-cylinder gas composition in a controlled auto-ignition combustion engine'. Measurement Science and Technology, 19 (1). pp. 015409 - 015409. ISSN: 0957-0233

Gill, K. and Zhao, H. (2008) 'In-cylinder studies of fuel injection and combustion from a narrow cone fuel injector in a high speed single cylinder optical engine'.2008 SAE International Powertrains, Fuels and Lubricants Congress. SAE International. ISSN: 0148-7191

Martins, M. and Zhao, H. (2008) '4-stroke multi-cylinder gasoline engine with controlled auto-ignition (CAI) combustion: A comparison between naturally aspirated and turbocharged operation'.2008 SAE Brasil Congress and Exhibit. SAE International. ISSN: 0148-7191

Li, Z., Xie, H. and Zhao, H. (2008) 'Studies of the control of in-cylinder inhomogeneities in a 4VVAS gasoline engine'.SAE World Congress & Exhibition. SAE International. ISSN: 0148-7191

Zhou, N., Xie, H., Li, N., Chen, T. and Zhao, H. (2008) 'Study on layered close loop control of 4-Stroke Gasoline HCCI engine equipped with 4VVAS'.SAE World Congress & Exhibition. SAE International. ISSN: 0148-7191

Zhao, H. (2007) 'Four-stroke CAI engines with residual gas trapping', inHCCI and CAI Engines for the Automotive Industry. Elsevier. pp. 103 - 135. ISBN 13: 9781845691288.

Zhao, H. (2007) 'Outlook and future directions in HCCI/CAI engines', inHCCI and CAI Engines for the Automotive Industry. Elsevier. pp. 507 - 509. ISBN 13: 9781845691288.