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Số người truy cập: 75,104,053

  Technique of Biogas-HHO Gas Supply for SI Engine
Tác giả hoặc Nhóm tác giả:  Bui Van Ga, Bui Thi Minh Tu, Truong Le Bich Tram, Bui Van Hung
Nơi đăng: International Journal of Engineering Research & Technology (IJERT); Số: Vol. 8 Issue 05;Từ->đến trang: 669-674;Năm: 2019
Lĩnh vực: Khoa học công nghệ; Loại: Bài báo khoa học; Thể loại: Quốc tế
TÓM TẮT
The paper presents a new technique to control the air-fuel ratio of a SI engine fueled with biogas-HHO gas based on the simulation of pressure variation in the intake manifold. With a fi-correction valve integrated into the conventional gaseous fuel supplying valve, the equivalence ratio of the mixture can be controlled in a narrow gap around the stoichiometric value. The fi-correction valve is in action under the effect of vacuum which decreases as decreasing of engine speed or/and increasing of flow obturation. Without fi-correction valve, the equivalence ratio of biogas-HHO gas fueling engine decreases significantly as increasing of engine speed. In this case, with the same gas supply condition, the suitable mixture for low engine speed becomes too poor at high engine speed; conversely, optimal mixture for high engine speed becomes too rich at low engine speed. The compact gaseous fuel supplying kit included a mixer, a main fuel injection valve and a fi-correction valve can provide a stable equivalence ratio at any engine speed regimes. This new concept of air-fuel ratio control can overcome the inconveniences of the conventional system and it has demonstrated as an appropriate technique for biogas-HHO gas supplying to SI engine in practice.
ABSTRACT
The paper presents a new technique to control the air-fuel ratio of a SI engine fueled with biogas-HHO gas based on the simulation of pressure variation in the intake manifold. With a fi-correction valve integrated into the conventional gaseous fuel supplying valve, the equivalence ratio of the mixture can be controlled in a narrow gap around the stoichiometric value. The fi-correction valve is in action under the effect of vacuum which decreases as decreasing of engine speed or/and increasing of flow obturation. Without fi-correction valve, the equivalence ratio of biogas-HHO gas fueling engine decreases significantly as increasing of engine speed. In this case, with the same gas supply condition, the suitable mixture for low engine speed becomes too poor at high engine speed; conversely, optimal mixture for high engine speed becomes too rich at low engine speed. The compact gaseous fuel supplying kit included a mixer, a main fuel injection valve and a fi-correction valve can provide a stable equivalence ratio at any engine speed regimes. This new concept of air-fuel ratio control can overcome the inconveniences of the conventional system and it has demonstrated as an appropriate technique for biogas-HHO gas supplying to SI engine in practice.
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