IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0213737
(2002-08-07)
|
우선권정보 |
DE-0038756 (2001-08-07) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
6 인용 특허 :
4 |
초록
▼
A high-pressure fuel accumulator for a fuel injection system of an internal combustion engine, in particular for a common-rail fuel injection system, has an elongated base body having an accumulator space for high-pressure fuel extending in the longitudinal direction of the base body, communicating
A high-pressure fuel accumulator for a fuel injection system of an internal combustion engine, in particular for a common-rail fuel injection system, has an elongated base body having an accumulator space for high-pressure fuel extending in the longitudinal direction of the base body, communicating with multiple connecting bores. A relief space connected to a low-pressure connection is provided in the base body, with a drain channel from the accumulator space opening into it. A pressure regulating valve is installed in the base body for opening and closing the drain channel.
대표청구항
▼
1. A high-pressure fuel accumulator for a fuel injection system of an internal combustion engine, comprising:an elongated base body, the elongated base body including:an accumulator space for high-pressure fuel extending in a longitudinal direction of the elongated base body, the accumulator space c
1. A high-pressure fuel accumulator for a fuel injection system of an internal combustion engine, comprising:an elongated base body, the elongated base body including:an accumulator space for high-pressure fuel extending in a longitudinal direction of the elongated base body, the accumulator space communicating with a plurality of connecting bores,a relief space connected to a low-pressure connection, anda drain channel from the accumulator space opening into the relief space; anda pressure regulating valve installed in the elongated base body for opening and closing the drain channel;wherein the pressure regulating valve includes: a valve element, a valve seat and an actuating device operable to act upon the valve element; and wherein the valve element cooperates with the valve seat, and the drain channel from the accumulator space opens into the valve seat. 2. A high-pressure fuel accumulator for a fuel injection system of an internal combustion engine, comprising:an elongated base body, the elongated base body including:an accumulator space for high-pressure fuel extending in a longitudinal direction of the elongated base body, the accumulator space communicating with a plurality of connecting bores,a relief space connected to a low-pressure connection, anda drain channel from the accumulator space opening into the relief space; anda pressure regulating valve installed in the elongated base body for opening and closing the drain channel;wherein:the accumulator space is formed by an approximately cylindrical recess in the elongated base body; andthe drain channel branches off from a first end of the approximately cylindrical recess in parallel with a central axis of the approximately cylindrical recess. 3. The high-pressure fuel accumulator as recited in claim 2, further comprising a drain line, wherein the drain line is connected to the low-pressure connection and branches off from the relief space radially to the central axis. 4. The high-pressure fuel accumulator as recited in claim 1, wherein the actuating device includes:an electromagnet including solenoids; anda magnet armature operable to be acted upon by a valve spring, wherein the magnet armature is in turn operable to act upon the valve element. 5. The high-pressure fuel accumulator as recited in claim 4, wherein the magnet armature includes an armature plate and a holding-down bolt slidably and displaceably mounted in a bore communicating with the relief space, and wherein an end of the holding-down bolt faces away from the solenoids, which solenoids are operable to act upon the valve element. 6. The high-pressure fuel accumulator as recited in claim 4, wherein the electromagnet is insertable with the armature plate into a receptacle on an end face of the elongated base body, and wherein the receptacle is sealed with a cover part. 7. A high-pressure fuel accumulator for a fuel injection system of an internal combustion engine, comprising:an elongated base body, the elongated base body including:an accumulator space for high-pressure fuel extending in a longitudinal direction of the elongated base body, the accumulator space communicating with a plurality of connecting bores,a relief space connected to a low-pressure connection, anda drain channel from the accumulator space opening into the relief space; anda pressure regulating valve installed in the elongated base body for opening and closing the drain channel;wherein the elongated base body includes a connection for supplying overflow fuel, the connection being connected by an inlet line to the relief space. 8. The high-pressure fuel accumulator as recited in claim 7, wherein:the inlet line branches off from the relief space radially to a central axis of the accumulator space. 9. A high-pressure fuel accumulator for a fuel injection system of an internal combustion engine, comprising:an elongated base body, the elongated base body including:an accumulator space for high-pressure fuel extending in a longitudinal direction of the elongated base body, the accumulator space communicating with a plurality of connecting bores,a relief space connected to a low-pressure connection, anda drain channel from the accumulator space opening into the relief space; anda pressure regulating valve installed in the elongated base body for opening and closing the drain channel;wherein:the accumulator space is formed in the elongated base body by a longitudinal bore, the longitudinal bore being sealed at a first end by a valve part inserted into the longitudinal bore; andthe valve part includes at least the drain channel, the relief space, and a section of a drain line connecting the relief space to the low-pressure connection. 10. The high-pressure fuel accumulator as recited in claim 9, wherein:the valve part has an approximately cylindrical outer jacket sealingly connected to an inside wall of the longitudinal bore. 11. A high-pressure fuel accumulator for a fuel injection system of an internal combustion engine, comprising:an elongated base body, the elongated base body including:an accumulator space for high-pressure fuel extending in a longitudinal direction of the elongated base body, the accumulator space communicating with a plurality of connecting bores,a relief space connected to a low-pressure connection, anda drain channel from the accumulator space opening into the relief space; anda pressure regulating valve installed in the elongated base body for opening and closing the drain channel;wherein the drain channel includes a throttle.
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