Accumulator injection system for an internal combustion engine
An injection system and pressure accumulator technology, applied in fuel injection devices, fuel injection devices with oil reservoirs, charging systems, etc., can solve problems such as excessive pressure fluctuations and affecting the accuracy of the injection process
Active Publication Date: 2008-07-16
GANSER HYDROMAG
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Problems solved by technology
[0011] The configuration according to DE 31 19 050 only allows the injection valve with an integrated storage chamber to form a unit together with a pump and the associated connecting line, because in many cases the storage chamber will have smaller dimensions via a relatively thin pressure line. When connecting two injection valves to a multi-cylinder pump, dynamic pressure fluctuations that are too large and not in phase with the injection process occur, which impermissibly affect the accuracy of the injection process
Method used
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[0034] FIG. 1 shows an accumulator injection system 10 , in which a high-pressure delivery device 12 is schematically shown. The high-pressure delivery device 12 is usually a high-pressure pump 12 ′, which is driven mechanically and at a fixed speed ratio by the internal combustion engine. A high-pressure compensating volume and additionally a pressure sensor for determining and regulating the system high pressure can be present in the high-pressure pump 12 ′, which are not shown in FIG. 1 . A high-pressure line system adjoins the discharge side of the high-pressure pump 12 ′ or the high-pressure delivery device 12 , which is usually secured by a high-pressure screw. The line system formed by the high-pressure line arrangement 13 comprises a fuel supply line 14 extending in the longitudinal direction (which is generally formed from a plurality of line parts 14 ″ combined in the longitudinal direction) and each injection valve 18 One fuel line 16 each, wherein there are genera...
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Disclosed is a high-pressure accumulator injection system (10) for an internal combustion engine, preferably a diesel engine. Said injection system (10) comprises a number of injection valves (18) which are connected to a high-pressure conveying device (12) via fuel pipes (16, 14). A reservoir (22) and a check valve encompassing a bypass throttle (24) that is connected in parallel are assigned to each injection valve (18). Said check valve which is assigned to each injection valve (18) and encompasses a bypass throttle (24) that is connected in parallel allows the accumulator injection system (10) to perform stable and reproducible injection processes with a favorable pressure curve during each injection process even when the discrete reservoirs (22) are provided with an unusually low volume. The reservoirs (22) can be integrated in the housing of the injection valves (18). The inventive injection system dispenses with the need for a complex common rail.
Description
technical field [0001] The invention relates to an accumulator injection system for the intermittent injection of high-pressure fuel into a combustion chamber of an internal combustion engine according to the preamble of claim 1 . Background technique [0002] An accumulator injection system of this type is known from DE 102 10 282 A1. The delivery unit delivers fuel from a fuel reservoir for feeding at least one high-pressure line leading to a cylinder of the internal combustion engine. A number of fuel injectors are supplied with fuel via the at least one high-pressure line, the fuel injectors each comprising a nozzle for supplying fuel to a combustion chamber of the internal combustion engine. The at least one high-pressure line contains line sections with which the individual fuel injectors are connected to one another. The injector body of these fuel injectors includes an integrated reservoir. The storage chambers are used instead of a common rail and each storage ch...
Claims
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IPC IPC(8): F02M63/02F02M55/04F02M63/00F02M47/02F02M55/02
CPCF02M47/027F02M55/025F02M55/04F02M63/001F02M63/0215F02M63/0225F02M2200/40
Inventor M·甘瑟
Owner GANSER HYDROMAG