This is the latest version of this item.

Abstract

In order to achieve carbon neutrality by decreasing Carbon Dioxide (CO2) emissions, Oxy-Fuel Combustion (OFC) technology with Carbon Capture and Storage (CCS) is becoming a hot topic in the field of Internal Combustion Engine (ICE). However, almost no research has been reported about the implementation of OFC in dual-injection Spark Ignition (SI) engine. This article presents a numerical study about the effects of Water Injection (WI) strategies on OFC in a dual-injection Spark Ignition (SI) engine, with Gasoline Direct Injection (GDI), Port Fuel Injection (PFI) and P50-G50 (50% PFI and 50% GDI) three injection strategies. The results show that compared to Conventional Air Combustion (CAC), there is a significant increase in BSFC under OFC. θ_F is significantly prolonged, and the spark timing is obviously advanced. The θ_C of PFI is a bit shorter than that of GDI and P50-G50. There is a small benefit to BSFC under low R_wf. However, with the further increase of R_wf from 0.2 to 0.9, there is an increment of 4.29%, 3.6% and 3.77% in BSFC for GDI, P50-G50 and PFI, respectively. As t_WI postpones to around -30 °CA under the conditions of R_wf ≥ 0.8, BSFC has a sharp decrease of more than 6 g/kWh, and this decline is more evident under GDI injection strategy. The variation of Pmax and φ_CA50 is less affected by T_WI compared to the effects of R_wf or t_WI. BSFC just has a small decline with the increase of T_WI from 298K to 368K regardless of the injection strategy. Consequently, it is feasible to implement appropriate WI strategies to control OFC characteristics in a dual-injection SI engine, but the benefit in fuel economy is limited.

Available Versions of this Item

• Numerical study on the effects of intake charge on oxy-fuel combustion in a dual-injection spark ignition engine at economical oxygen-fuel ratios. (deposited 10 Jun 2021 10:01)
  • Numerical study on the effects of intake charge on oxy-fuel combustion in a dual-injection spark ignition engine at economical oxygen-fuel ratios. (deposited 18 Jun 2021 11:20) [Currently Displayed]