Nghiên cứu mô phỏng ảnh hưởng của độ sâu trên đỉnh Piston đến các thông số vận hành của động cơ 1 xylanh sử dụng nhiên liệu CNG

NGHIEN CU'U-TRAO DOI

NGHIEN CU'U MO PH6N G AN H HU'DNG QUA DO SAU

TREN D[NH PISTON DEN GAG THONG SO VAN HANH

GUADON G G O 1 XYLANH SLP DUNG NHIEN LIEU GNG

SIMULATION STUDY ON EFFECT OF THE HIGH BOWL-IN-PI STON ON

OPERATING PARAMETERS IN CONVERTED CNG SINGLE CYLINDER ENGINE

ThS. Tran Thanh Tam\ KS. Giang Trung Hiiu\ ThS. Nguyin Minh Thang^

GS,TS. Pham Minh Tuan', TS. Tran Dang Qudc'

'Vien Co khi Dpng luc, Trucmg Dai hpc Bach khoa Ha Ngi

^Truong Dai hpc Cong nghiep Ha Npi

TOM TAT

Bdi bdo ndy trinh bdy nghien cim ve dnh hu&ng cua dp sdu phdn khoet ldm tren dinh piston

den cdc thong so van hdnh & dpng ca CNG mpt xylanh chuyen doi. Cdc ket qud thu dupe cho thdy

rdng, khi thay doi dp sdu tren dinh piston hieu sudt nhiet cua dpng ca duac cdi thien ddng ke ngay

cd khi toe dp dpng cald n = 2.400 vong/phut. Nguyen nhdn de co duac ket qua ndy la do dpng hpc

cua dong khi a ben trong xylanh da duac cdi tdng len khi tdng dp sdu phdn khoet ldm tren dinh

piston.

Tir khoa: Dp sdu tren piston; Dong hpc cua chdt khi; Thong so van hdnh; Dpng ca mpt

xylanh; Dong ca CNG chuyen doi.

ABSTRACT

This article indicates the research on effect of high bowl-in-piston on operating parameters

in converted single cylinder CNG engine. The obtained results were clearly showed as changing

in the high bowl-in-piston, the thermal efficiency were significantly improved regardless of engine

speed equal 2400 rpm. The main cause to reach these results was due to the gas flow kinetics into

cylinder was enhanced when increasing high bowl-in-piston.

Keywords: High bowl-in-piston, Gas flow kinetics, Operating parameter. Single cylinder

engine, converted CNG engine. •=

iSSN 0866 - 7056 ^

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