In order to analyze the intake flow characteristics of a four-valve direct injection(DI) diesel engine. the experiments and numerical simulations were conducted to investigate the flow coefficient. swirl ratio and intake flow interference of the following 4 combinations of intake ports: (1) helical (left) and tangential (right). abbreviation ; (2) tangential (left) and helical (right)... https://stilleners.shop/product-category/headlight-cover/