| 摘要 |
1514229 IC engine air-fuel mixture induction systems GENERAL MOTORS CORP 3 July 1975 [19 July 1974] 28012/75 Heading F1B In an I.C. engine fuel and air induction system, a throttle plate 22 is provided with bores 104, 106 having counter-rotating throttle valves 112, 114 and with a fuel supply orifice 162 through which air flows from the bores 104, 106 via passages 168 and through which fuel is injected in a conical spray 103 from a nozzle 86 having a pintle (100), Fig. 6 (not shown). When the throttle valves 112, 114 are closed, a sonic air-flow exists through the orifice 162 to optimize idle fuel mixing but with lower vacuum downstream of the orifice 162, there is non-sonic flow therethrough. The throttle valves are actuated by a link (156) Fig. 2 (not shown) which rotates a bell-crank 148 to which is pivoted a link 134 which engages levers 128, 140. To supply lubricant to mix with the air and fuel, bores 170, (172) Fig. 3 (not shown) are connected to a groove 176 via passages 174, (178).
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