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    • 56. 发明专利
    • BR9605297A
    • 1997-09-16
    • BR9605297
    • 1996-01-17
    • BOSCH GMBH ROBERT
    • WILLKE CLEMENSFRANZKE KLAUSALBRODT HARTMUTBELZNER NORBERT
    • F02M51/06F02M53/04F02M61/14F02M61/16F02M61/18
    • PCT No. PCT/DE96/00053 Sec. 371 Date Oct. 2, 1996 Sec. 102(e) Date Oct. 2, 1996 PCT Filed Jan. 17, 1996 PCT Pub. No. WO96/23968 PCT Pub. Date Aug. 8, 1996When an internal combustion engine is hot, especially in hot starting or during hot idling, outgassing of fuel occurs upstream of the injection port disk and at the injection ports; as a result, because too little fuel is supplied, the running performance is undesirably impaired. The running performance of the engine is therefore intended to be improved by preventing the development of vapor bubbles. By the provision of a transfer element, in the form of a raised body shoulder formed on the valve seat body, that reduces the heat transfer between the valve seat body and the injection port disk, it is accomplished that the injection port disk cools down as a result of the extracted heat of evaporation of the injected fuel, and thus the danger of vapor bubble development at the injection ports or upstream is reduced. The fuel injection valve is especially suitable for fuel injection systems in mixture-compressing internal combustion engines with externally supplied ignition.
    • 58. 发明专利
    • INJECTION VALVE LEAK TESTING
    • GB2247957A
    • 1992-03-18
    • GB9117377
    • 1991-08-12
    • BOSCH GMBH ROBERT
    • ALBRODT HARTMUTMAIER MARTIN
    • F02M65/00G01F23/292G01M3/28G01M15/04
    • The testing device for measurement of a hydraulic leak rate of a spraying valve (11) with a closable outlet opening(11B) includes a vessel (10) filled with an indicating liquid (12) and a device for holding the valve to be tested with the outlet opening (11B) in an inclined position pointing downward into the indicating liquid during testing, a riser tube (14) formed as a glass capillary tube connected with the vessel (10), a balancing reservoir (17) also connectable with the vessel (10) but disconnectable from the vessel (10) with a shutoff valve (15), a light source (18) positioned relative to the riser tube (14) so as to illuminate the riser tube (14) and the liquid level (M) in the riser tube (14) and a linear scanning camera (19) positioned relative to the riser tube (14) so as to observe the height (H) of the liquid level (M) in the riser tube for accurate measurement of a change in the height (H) of the liquid level M when the closed valve is pressurized. The leak rate is calculable from the change in height of the liquid level as measured accurately by the linear scanning camera, the cross sectional area of the liquid in the riser tube and the measurement time.