在毛主席革命路线指引下,我公司在一九七四年八月至一九七五年一月曾采用优选法提出了解放牌汽车使用的231A_2G型化油器改用φ28.72毫米大喉管和1(1/8)圈油针开度的节油技术方案,取得了一定效果。但喉管缩小后,由于化油器腔体的通过面积缩小了117.35平方毫米,发动机最大功率有所下降。为了解决这个动力性和经济性的矛盾,我们又提出了将231A_2G Guided by Chairman Mao’s revolutionary line, our company applied the optimization method from August 1974 to January 1975 to introduce the 231A_2G carburetor used by Jiefangpai Automobile instead of the φ28.72 mm large throat pipe And 1 (1/8) ring oil needle opening fuel-saving technology programs, and achieved some results. However, after the throat has been reduced, the maximum engine power has decreased due to the narrowing of the passage area of ​​the carburetor chamber by 117.35 mm 2. In order to solve this dynamic and economic contradictions, we have put forward 231A_2G