GB981601A - Improvements in and relating to apparatus for cleaning the nozzle bodies of the injectors of compression ignition internal combustion engines - Google Patents

Abstract

981,601. Cleaning nozzle bodies. LESLIE HARTRIDGE Ltd. Aug. 2, 1961 [Aug. 2, 1960], No. 26723/60. Heading F2N. Apparatus for cleaning the nozzle bodies of the injectors of compression-ignition internalcombustion engines comprises a cleaning nozzle 8 adapted to receive a nozzle body x, means for forcing cleaning liquid through the nozzle body by way of the cleaning nozzle, means for supplying compressed air to the cleaning nozzle so that the air passes through the nozzle body, a valve 19 adapted to control the flow of compressed air to the cleaning nozzle and a pump 47 adapted, when operated, to force liquid through the cleaning nozzle, and means for bringing about operation of the pump and for opening and closing the valve. As shown, the nozzle 8 is secured to a tee-union 6 held in the base of a bowl 2 supported by a dished base 1, and having an integral bar 18. Laterally-spaced fingers 66 urged towards each other by a spring 67 and arranged one on either side of a vertical dolly 12 are pivoted on a bracket carried by a transverse shaft 15 rotated by a handle 17 and mounting lobes 31, 55 for operation respectively of the valve 19 and of the pump. An air pipe 35 is joined to a connector 34 at the base of the valve, and the two-ways 37, 41 of the connector lead respectively to a fume aspirator tube 38 having a discharge nozzle 39 in an exhaust pipe 40 and to a pipe 42 joined to the one side 43 of the union 6; the pump 47 is joined by a pipe 61 to the other side 62 of the union and by a pipe 59 to a filter 60. In cleaning a nozzle body, the domed, transparent cover 71 is raised and the body is located on the nozzle 8. The cover is lowered and the lever 17 moved downwardly so that the fingers 66 are splayed by the upper cone of the dolly 12 and are then allowed to approach each other to contact and lie on opposite sides of the nozzle body near to a shoulder y of the body or a shoulder on an adaptor previously applied to the body; when the fingers are in position further movement of the bracket 64 is prevented by a stop 77 but the shaft continues to turn by virtue of a spring connection 69 between the bracket and the shaft. The lobe 31 opens the valve 19 so that compressed air passes to the nozzle body and then closes, after which the lobe 55 causes the pump piston 48 to be depressed and force liquid through the nozzle body. The lever is allowed to return to a vertical position so that the lobe 31 re-opens the valve 19 to cause a second stream of air to pass to the nozzle body and to allow the fingers 66 to release the body. Liquid trapped in the bowl drains through a screen 5a into the base 1. A nozzle body may be cleaned in the reverse direction by using a cleaning nozzle in the form of a cup.