Wetting of intake manifold

Claim 1

In an automotive internal combustion engine having an intake manifold for delivering a fuel charge to an intake valve, said manifold having walls subject to becoming fuel dry upon reacceleration of the automobile and thereby causing lag in engine operation, a charge-forming device for delivering a combustible charge of fuel and air to the intake manifold, said device including an accelerating pump unit having an outlet passage for pumped liquid fuel and a charge forming chamber for mixing liquid fuel with air, said outlet passage leading to said chamber, said pump including a bore and a piston in the bore, said piston having means for connection to throttle linkage of the engine so the liquid fuel is forced into said outlet passage upon accelerating movement of the throttle, means forming a second passage intersecting said outlet passage and receiving liquid fuel therefrom, an open conduit connected at one end to said second passage to receive liquid fuel upon operation of the pump, a nozzle in said intake manifold positioned to spray liquid fuel in said manifold toward said intake valve, the other end of the conduit being connected to and delivering fuel to the nozzle whereby operation of the accelerating pump delivers liquid fuel directly to the intake manifold to counteract dry wall and overcome lag in operation of the engine.