Patent GB-753178-A (GB)
Title: Improvements in systems constituted by an internal combustion engine provided with astarter and with a carburetter including an auxiliary starting carburetter device controlled by thermosensitive means
Inventor: MENNESSON ANDRE LOUIS
IPC: F02M1/04
Filed: 1954-06-25
Abstract: 753,178. Spray carburetters. SOLEX. June 25, 1954 [July 23, 1953], No. 18725/54. Class 7(3) [Also in Group XXXV] The carburetter and' starter are conjointly controlled. The carburetter includes an auxiliary starting device controlled by thermosensitive means this auxiliary starting device comprising distributing valve means including locking means for holding the valve means in closed position which locking means are automatically brought out of action when the throttle valve of the carburetter is moved in the opening direction, and between the throttle valve and the distributing valve means a transmission is provided such that the throttle is slightly pushed back by a push piece movable together with the distributing valve means in the opening direction against the action of resilient means from its maximum closing position when the distributing valve means are brought into a position such that fuel is fed towards the induction pipe of the engine, and a unidirectional trip transmission device so provided between the control means of the starter and the throttle valve such that when the starter control means are actuated from their position of rest in the direction foroperating the starter the throttle valve is first moved in the opening direction against the action of the resilient return means until the throttle valve is released by the push piece thus leaving the thermosensitive means capable of bringing the distributing valve means into the position corresponding to the temperature of the thermosensitive means after which when the starter control means are further 'moved in the same direction first the throttle valve is released and left free to come back into its correct position then the starter is operated the starter control means being then allowed to come back to its position of rest without causing the partly open position occupied by the throttle valve to be modified. As shown the distributing valve 16 of an auxiliary starting carburetter is controlled by a bimetallic strip 30 when the distributing valve is in a position in which fuel is fed to the induction pipe the throttle valve is slightly moved in the opening direction by means of a cam 25 on the distributing valve shaft. The cam operates the throttle valve through the medium of a roller 26 and bent lever 27 when a starter control 4 is operated first the throttle valve is opened to a degree at least equal to that necessary for starting from the coldest possible temperature by means of a pawl 38 This is necessary since the roller 26 may co-operate with a recess 33 in the cam to lock the distributing valve. The bimetallic strip not being strong enough to rotate the cam against the opposition of the roller 26. The distributing valve is then moved by the bimetallic 'strip into a position corresponding to the temperature of the surrounding atmosphere. Next the pawl disengages from the arm 34 and the throttle valve is left free to come back into its correct position determined by the cam 25. Then the starter (for instance of the electrical type) is operated. The distributing valve may either connect the starting carburetter to a passage 18 or to this passage and a passage 19. Air heated by the exhaust gases of the engine acts on the bimetallic strip 30.