GB426632A - Suction actuated governors for internal combustion engines - Google Patents

Abstract

426,632. Spray carburetters. SOC. GENERALE DES CARBURATEURS ZENITH, 10, Rue Petitot, Geneva, Switzerland. Sept. 7, 1933, No. 24848. Convention date, Sept. 8, 1932. [Class 7 (iii)] A spiral spring 15 or a weight rotates the throttle spindle 6 and valve 5 towards the open position to an amount determined by the engagement of a screw 11 on the spindle with the end of a slot 10 in the hub of a loosely mounted control lever 8 by which the valve may be closed positively. Adjacent the spring 15, there is secured to the spindle a vane 22 dividing a sector shaped chamber 19 in two compartments 20, 21 communicating respectively through a port 27 with the induction pipe beyond the throttle valve and through a port 26 with the atmosphere or carburetter side of the throttle valve. The spring 15 and port 27 are so proportioned that excessive engine speed causes sufficient suction on the vane to close the throttle valve and this closure is rendered independent of the throttle valve position by varying the ratio of the cross-sections of the passages connecting the compartments 20, 21 with the induction pipe on the one hand and with the atmosphere or carburetter side of the throttle valve on the other hand. A passage 28 connects the suction chamber 20 through the spindle 6 to a slot 29 of varying width in the wall of the chamber 19 or the port 27, Fig. 6, communicates with a chamber 31 communicating by a series of ports 34 adjacent the throttle valve with the induction pipe, the position of the valve determining the number of ports affected by suction behind it. The Specification as open to inspection under Sect. 91 describes also a construction in which a piston controlling the vent of the float chamber is actuated by the suction beyond the throttle as modified by the suction in front thereof, this latter suction being controlled by the co-operation of a tapering slot in the throttle spindle with a passage communicating with the suction side of the piston. In other constructions, the piston controls a fuel valve between the float chamber and the nozzle or varies the suction in fuel passages leading to the nozzle. This subject-matter does not appear in the Specification as accepted.