Effect of Oil Viscosity and Driving Mode on Oil Dilution and Transient Emissions Including Particle Number in Plug-In Hybrid Electric Vehicle

Fan, Qinhao; Wang, Yunfei; Xiao, Jun Jun; Zhi, Wang; Li, Weizi; Jia, Tian; Zheng, Bin; Taylor, R. I.

doi:10.4271/2020-01-0362

Cited by 10 publications

(8 citation statements)

References 21 publications

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“…This means there will be many more stop-starts than for conventional vehicles, potentially leading to higher levels of wear. Fan et al [27] found that when the PHEV was run in electric-only mode, the engine could still engage if accelerations were high and/or if the battery charge level became too low. The intermittent nature of engine operation can lead to lower engine oil temperatures (compared to that typical of conventional engines).…”

Section: Mild Hybrid and Phev Engine Lubricationmentioning

confidence: 99%

“…The intermittent nature of engine operation can lead to lower engine oil temperatures (compared to that typical of conventional engines). In addition, Fan et al [27] found higher levels of fuel dilution in the lubricant (more details are given in Section 5). They also noted that tailpipe emissions (NO x and PM) could be higher since the aftertreatment systems were not always at optimum operating temperature.…”

Section: Mild Hybrid and Phev Engine Lubricationmentioning

confidence: 99%

“…Fan et al [27] recently investigated the impact of oil viscosity and driving mode (hybrid versus conventional) on fuel dilution of the lubricant and emissions (including particle number) for different drive cycles (WLTC, the World-Wide Harmonized Light Duty Driving Test Cycle, and the continuous, ECE-15 portion of the New European Driving Cycle, NEDC). For hybrid operation, the state of charge of the battery was controlled at a low level (10-13%) to ensure more engine starts.…”

Section: Engine Oils For Phevs and Mhevsmentioning

confidence: 99%

“…The work showed that fuel dilution is potentially a critical issue for PHEV vehicles. The work by Fan et al [27] used Geely vehicles equipped with a 1.5 litre turbo-charged direct injection (TGDI) engine. In the work, engine oils with viscosity grade SAE 0W-20 and SAE 5W-30 were tested, and, as expected, use of the SAE 0W-20 lubricant viscosity grade gave lower fuel consumption figures.…”

Section: Engine Oils For Phevs and Mhevsmentioning

confidence: 99%

See 3 more Smart Citations

Energy Efficiency, Emissions, Tribological Challenges and Fluid Requirements of Electrified Passenger Car Vehicles

Taylor

2021

Lubricants

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The motivations for the move to electrified vehicles are discussed with reference to their improved energy efficiency, their potential for lower CO2 emissions (if the electricity system is decarbonized), their lower (or zero) NOx/particulate matter (PM) tailpipe emissions, and the lower overall costs for owners. Some of the assumptions made in life-cycle CO2 emissions calculations are discussed and the effect of these assumptions on the CO2 benefits of electric vehicles are made clear. A number of new tribological challenges have emerged, particularly for hybrid vehicles that have both a conventional internal combustion engine and a battery, such as the need to protect against the much greater number of stop-starts that the engine will have during its lifetime. In addition, new lubricants are required for electric vehicle transmissions systems. Although full battery electric vehicles (BEVs) will not require engine oils (as there is no engine), they will require a system to cool the batteries—alternative cooling systems are discussed, and where these are fluid-based, the specific fluid requirements are outlined.

show abstract

Section: Mild Hybrid and Phev Engine Lubricationmentioning

confidence: 99%

Section: Mild Hybrid and Phev Engine Lubricationmentioning

confidence: 99%

Section: Engine Oils For Phevs and Mhevsmentioning

confidence: 99%

Section: Engine Oils For Phevs and Mhevsmentioning

confidence: 99%

See 2 more Smart Citations

Energy Efficiency, Emissions, Tribological Challenges and Fluid Requirements of Electrified Passenger Car Vehicles

Taylor

2021

Lubricants

View full text Add to dashboard Cite

show abstract

“…This means there will be many more stop-starts than for conventional vehicles, potentially leading to higher levels of wear. Fan et al [22] found that when the PHEV was run in electric only mode, the engine could still engage if accelerations were high and/or if the battery charge level was too low. The intermittent nature of engine operation can lead to lower engine oil temperatures (compared to that typical of conventional engines).…”

Section: Mild Hybrid and Phev Engine Lubricationmentioning

confidence: 99%

Energy Efficiency, Emissions, Tribological Challenges and Fluid Requirements of Electrified Passenger Car Vehicles

Taylor¹

2021

Preprint

View full text Add to dashboard Cite

The motivations for the move to electrified vehicles are discussed with reference to their improved energy efficiency, their potential for lower CO2 emissions (if the electricity system is decarbonized), their lower (or zero) NOx/particulate matter (PM) tailpipe emissions, and the lower overall costs for owners. Some of the assumptions made in life-cycle CO2 emissions calculations are discussed and the effect of these assumptions on the CO2 benefits of electric vehicles are made clear. A number of new tribological challenges have emerged, particularly for hybrid vehicles that have both a conventional internal combustion engine and a battery, such as the need to protect against the much greater number of stop-starts that the engine will have during its lifetime. In addition, new lubricants are required for electric vehicle transmissions systems. Although full battery electric vehicles (BEVs) will not require engine oils (as there is no engine) they will require a system to cool the batteries – alternative cooling systems are discussed, and where these are fluid based, the specific fluid requirements are outlined.

show abstract

Impact of electric vehicles on emissions, and potential tribological issues with hybrid electric vehicles

Taylor

2024

Electric Vehicle Tribology

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Effect of Oil Viscosity and Driving Mode on Oil Dilution and Transient Emissions Including Particle Number in Plug-In Hybrid Electric Vehicle

Cited by 10 publications

References 21 publications

Energy Efficiency, Emissions, Tribological Challenges and Fluid Requirements of Electrified Passenger Car Vehicles

Energy Efficiency, Emissions, Tribological Challenges and Fluid Requirements of Electrified Passenger Car Vehicles

Energy Efficiency, Emissions, Tribological Challenges and Fluid Requirements of Electrified Passenger Car Vehicles

Impact of electric vehicles on emissions, and potential tribological issues with hybrid electric vehicles

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