A volume chamber is formed by a valve member, an inner peripheral wall of a tubular portion and a bottom portion of a stopper when the valve member is engaged with tubular portion. A communication passage communicates between the volume chamber and one of an intermediate passage of a valve body and
A volume chamber is formed by a valve member, an inner peripheral wall of a tubular portion and a bottom portion of a stopper when the valve member is engaged with tubular portion. A communication passage communicates between the volume chamber and one of an intermediate passage of a valve body and a tertiary passage of the stopper. The communication passage is formed at a location, which is spaced from a contact surface between the tubular portion and the valve member by a first predetermined distance and is also spaced from a contact surface between the bottom portion and the first urging member by a second predetermined distance.
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1. A high pressure pump comprising: a plunger that is reciprocally movable;a housing that includes: a pressurizing chamber, in which fuel is pressurized by the plunger; anda fuel passage, which guides the fuel to the pressurizing chamber;a valve body that is placed in the fuel passage and includes a
1. A high pressure pump comprising: a plunger that is reciprocally movable;a housing that includes: a pressurizing chamber, in which fuel is pressurized by the plunger; anda fuel passage, which guides the fuel to the pressurizing chamber;a valve body that is placed in the fuel passage and includes a valve seat in a wall surface of the valve body on one side of the valve body, at which the pressurizing chamber is located;a valve member that is placed in the valve body and is slidable along the valve body, wherein the valve member includes a valve head, which is seatable against the valve seat to disable flow of the fuel through the fuel passage and is also liftable away from the valve seat to enable the flow of the fuel through the fuel passage;a stopper that is placed on one side of the valve member, at which the pressurizing chamber is located, wherein the stopper includes: a tubular portion;a bottom portion that closes to fluid one end part of the tubular portion, which is opposite from the valve member; andan annular expanded portion, which extends radially outward from the bottom portion, wherein when the valve member is engaged with the other end part of the tubular portion, which is opposite from the bottom portion, the stopper covers one end part of the valve member on the one side of the valve member, at which the pressurizing chamber is located, and limits movement of the valve member in a valve opening direction thereof, so that a volume chamber is formed by the valve member, an inner peripheral wall of the tubular portion and the bottom portion;a first urging member that is placed radially inward of the tubular portion and is engaged with the valve member and the bottom portion to urge the valve member in a valve closing direction thereof;a needle that has one end part, which is engageable with the other end part of the valve member that is opposite from the stopper, wherein the needle is movable together with the valve member in a common direction at the valve opening time or the valve closing time of the valve member;a second urging member that urges the needle in the valve opening direction of the valve member; andan electromagnetic drive device that includes a coil arrangement, which attracts the needle in one of the valve closing direction and the valve opening direction of the valve member, wherein:the fuel passage includes: a primary passage that is formed on one side of the valve seat of the valve body, which is opposite from the pressurizing chamber;a secondary passage that is configured into an annular form, wherein the secondary passage is formed between the valve member and the valve seat when the valve member is lifted away from the valve seat;a tertiary passage that is formed in the expanded portion of the stopper; andan intermediate passage, which is formed between the secondary passage and the tertiary passage;the stopper includes a communication passage that communicates between the volume chamber and one of the intermediate passage and the tertiary passage; andthe communication passage is formed at a location, which is spaced from a contact surface between the tubular portion and the valve member by a first predetermined distance and is also spaced from a contact surface between the bottom portion and the first urging member by a second predetermined distance. 2. The high pressure pump according to claim 1, wherein: the valve member includes a projection, which is configured into a tubular form and projects from an outer peripheral edge of the valve head toward the stopper;when an end part of the projection on a stopper side of the projection is engaged with the other end part of the tubular portion, which is on a valve member side of the tubular portion, the volume chamber is formed; anda radial width of a wall surface of the projection, which is engageable with the tubular portion, is smaller than a radial width of a wall surface of the tubular portion, which is engageable with the projection. 3. The high pressure pump according to claim 1, wherein the communication passage and the tertiary passage are formed such that a central axis of the communication passage extends in a direction that is different from that of a central axis of the tertiary passage. 4. The high pressure pump according to claim 3, wherein the communication passage is placed such that the central axis of the communication passage intersects with the central axis of the tertiary passage. 5. The high pressure pump according to claim 2, wherein: the valve member further includes a shaft, which is connected to the valve head on the other side of the valve head opposite from the projection; andthe valve body includes a first guide portion that has a first receiving through hole, in which the shaft is slidably received. 6. The high pressure pump according to claim 1, wherein the electromagnetic drive device further includes a second guide portion that has a second receiving through hole, in which the needle is slidably received. 7. A high pressure pump comprising: a plunger that is reciprocally movable;a housing that includes: a pressurizing chamber, in which fuel is pressurized by the plunger; anda fuel passage, which guides the fuel to the pressurizing chamber;a valve body that is placed in the fuel passage and includes a valve seat in a wall surface of the valve body on one side of the valve body, at which the pressurizing chamber is located;a valve member that is placed in the valve body and is slidable along the valve body, wherein the valve member includes a valve head, which is seatable against the valve seat to disable flow of the fuel through the fuel passage and is also liftable away from the valve seat to enable the flow of the fuel through the fuel passage;a stopper that is placed on one side of the valve member, at which the pressurizing chamber is located, wherein the stopper includes: a tubular portion;a bottom portion that closes to fluid one end part of the tubular portion, which is opposite from the valve member; andan annular expanded portion, which extends radially outward from the bottom portion, wherein when the valve member is engaged with the other end part of the tubular portion, which is opposite from the bottom portion, the stopper covers one end part of the valve member on the one side of the valve member, at which the pressurizing chamber is located, and limits movement of the valve member in a valve opening direction thereof, so that a volume chamber is formed by the valve member, an inner peripheral wall of the tubular portion and the bottom portion;a first urging member that is placed radially inward of the tubular portion and is engaged with the valve member and the bottom portion to urge the valve member in a valve closing direction thereof;a needle that has one end part, which is engageable with the other end part of the valve member that is opposite from the stopper, wherein the needle is movable together with the valve member in a common direction at the valve opening time or the valve closing time of the valve member;a second urging member that urges the needle in the valve opening direction of the valve member; andan electromagnetic drive device that includes a coil arrangement, which attracts the needle in one of the valve closing direction and the valve opening direction of the valve member, wherein:the fuel passage includes: a primary passage that is formed on one side of the valve seat of the valve body, which is opposite from the pressurizing chamber;a secondary passage that is configured into an annular form, wherein the secondary passage is formed between the valve member and the valve seat when the valve member is lifted away from the valve seat;a tertiary passage that is formed in the expanded portion of the stopper; andan intermediate passage, which is formed between the secondary passage and the tertiary passage;the valve head includes a recess that is formed in a surface of the valve head on one side of the valve head, at which the stopper is located, and is recessed in a direction that is opposite from the stopper;the other end part of the first urging member, which is opposite from the bottom portion, is engaged with the recess;the valve member includes a communication passage, which communicates between the intermediate passage and the volume chamber; andthe communication passage is formed at a location, which is spaced from a contact surface between the recess and the first urging member by a first predetermined distance and is also spaced from a contact surface between the valve member and the tubular portion by a second predetermined distance. 8. The high pressure pump according to claim 7, wherein: the valve member includes a projection, which is configured into a tubular form and projects from an outer peripheral edge of the valve head toward the stopper;when an end part of the projection on a stopper side of the projection is engaged with the other end part of the tubular portion, which is on a valve member side of the tubular portion, the volume chamber is formed; anda radial width of a wall surface of the projection, which is engageable with the tubular portion, is smaller than a radial width of a wall surface of the tubular portion, which is engageable with the projection. 9. The high pressure pump according to claim 7, wherein the communication passage and the tertiary passage are formed such that a central axis of the communication passage extends in a direction that is different from that of a central axis of the tertiary passage. 10. The high pressure pump according to claim 9, wherein the communication passage is placed such that the central axis of the communication passage intersects with the central axis of the tertiary passage. 11. The high pressure pump according to claim 8, wherein: the valve member further includes a shaft, which is connected to the valve head on the other side of the valve head opposite from the projection; andthe valve body includes a first guide portion that has a first receiving through hole, in which the shaft is slidably received. 12. The high pressure pump according to claim 7, wherein the electromagnetic drive device further includes a second guide portion that has a second receiving through hole, in which the needle is slidably received. 13. The high pressure pump according to claim 1, wherein: the valve head of the valve member is engageable with the other end part of the tubular portion to form the volume chamber with the valve head of the valve member, the inner peripheral wall of the tubular portion and the bottom portion; anda wall of the valve head is continuously formed throughout the valve head to limit flow of fuel into and out of the volume chamber through the wall of the valve head when the valve head is engaged with the other end part of the tubular portion. 14. The high pressure pump according to claim 1, wherein the stopper is located only on one axial side of the valve head of the valve member, at which the pressurizing chamber is located, without extending into the other axial side of the valve head of the valve member. 15. The high pressure pump according to claim 1, wherein the valve head is circumferentially continuously engageable with the other end part of the tubular portion along an entire circumference of the valve head. 16. The high pressure pump according to claim 7, wherein: the valve head of the valve member is engageable with the other end part of the tubular portion to form the volume chamber with the valve head of the valve member, the inner peripheral wall of the tubular portion and the bottom portion; anda wall of the valve head is continuously formed throughout the valve head to limit flow of fuel into and out of the volume chamber through the wall of the valve head when the valve head is engaged with the other end part of the tubular portion. 17. The high pressure pump according to claim 7, wherein the stopper is located only on one axial side of the valve head of the valve member, at which the pressurizing chamber is located, without extending into the other axial side of the valve head of the valve member. 18. The high pressure pump according to claim 7, wherein the valve head is circumferentially continuously engageable with the other end part of the tubular portion along an entire circumference of the valve head.
Thorwirth, Erik; Eckart, Winfried; Brunner, Dominik; Heinen, Christian, Control valve, in particular for metering in a fluid for a delivery pump which is arranged downstream.
Thorwirth, Erik; Eckart, Winfried; Brunner, Dominik; Heinen, Christian, Control valve, in particular for metering in a fluid for a delivery pump which is arranged downstream.
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