FUEL INJECTION PUMP

• Main Authors: KRIEGER, KLAUS, RUESSELER, KARL-FRIEDRICH, SCHARF, MICHAEL
• Format: Patent
• Language: English; French; German
• Published: 27.10.1993
• Edition: 5
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MECHANICAL ENGINEERING; SUPPLYING COMBUSTION ENGINES IN GENERAL, WITH COMBUSTIBLEMIXTURES OR CONSTITUENTS THEREOF; WEAPONS

PCT No. PCT/DE90/00906 Sec. 371 Date Jul. 22, 1991 Sec. 102(e) Date Jul. 22, 1991 PCT Filed Nov. 24, 1990 PCT Pub. No. WO91/10055 PCT Pub. Date Jul. 11, 1991.A fuel injection pump having a speed governor which is housed in a pump body under a control pressure and which actuates an injection quantity control element, and a hydraulic injection timing mechanism which is connected with the pump body and which adjusts the start of injection (SB) to "early" with increasing pressure in the pump body, and to "late" with decreasing pressure. For the implementation of a load-dependent start of delivery (LFB), a governor sleeve of the speed governor governs in a load dependent manner, a relief throttle in the pump body, which, depending on the displacement setting of the governor sleeve, uncovers a varying cross-sectional throttle area to an outlet bore. In order to achieve clean exhaust gas in all load ranges, the relief throttle is designed so that the uncovered cross-sectional area of the throttle in a displacement setting (VL) assumed by the governor sleeve at full load, is zero or is very small, and that in a part load setting (TL) it is large, and that in a no-load or idling setting (NL) it is again smaller. Thus, the start of injection (SB) at no-load as opposed to part load, is adjusted once more to "early", albeit not so early as in the full load case.