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    • 1. 发明公开
    • Variable injection rate high pressure fuel pump
    • 可变喷射率高压燃油泵
    • EP2243951A3
    • 2010-12-08
    • EP10007797.3
    • 2003-09-26
    • Electro-Motive Diesel, Inc.
    • Gottemoller, PaulPoola, Ramesh B.Tupek, Richard WayneGoetzke, Michael Barry
    • F02M59/16F02M59/26F02M45/06
    • F04B49/18F02M45/063F02M59/16F02M59/26
    • A high pressure fuel pump having a variable fuel injection rate, including a pump body, a pump cylinder formed in the pump body and a piston reciprocable within the pump cylinder, which defmes a pressurization chamber (120). The pump piston (106) has a reduced diameter portion which provides a primary piston (112). A piston annulus is slidably mounted thereon and provides a secondary piston (116). An annular actuation chamber (122) adjoins the secondary piston (116) opposite the pressurization chamber (120). An actuation passage is provided between a return fuel drain and the actuation chamber (122), which is selectively open or closed passively by pump piston (106) movement and/or dynamically by operation of an actuation solenoid valve (128). If the actuation chamber passage (124) is open, then during the pressurization stroke the secondary piston (116) will remain stationary relative to the pump body, but if it is closed then the secondary piston (116) must stroke in unison with the primary piston (112).
    • 一种具有可变燃料喷射速率的高压燃料泵,其包括泵体,形成在泵体中的泵缸和可在泵缸内往复运动的活塞,其限定加压室(120)。 泵活塞(106)具有减小直径的部分,其提供主活塞(112)。 活塞环可滑动地安装在其上并提供第二活塞(116)。 环形致动室(122)与加压室(120)相对地邻接次级活塞(116)。 在返回燃料排出口和致动室(122)之间提供致动通道,该致动通道被泵活塞(106)移动和/或通过操作致动电磁阀(128)动态地选择性地打开或关闭。 如果致动室通道(124)打开,则在增压冲程期间,次活塞(116)将相对于泵体保持静止,但是如果其关闭,则次活塞(116)必须与主活塞 活塞(112)。
    • 5. 发明公开
    • Variable injection rate high pressure fuel pump
    • Einpritzmenggeschwindigkeit Brennstoffhochdruckpumpe
    • EP2243951A2
    • 2010-10-27
    • EP10007797.3
    • 2003-09-26
    • Electro-Motive Diesel, Inc.
    • Gottemoller, PaulPoola, Ramesh B.Tupek, Richard WayneGoetzke, Michael Barry
    • F02M59/16F02M59/26F02M45/06
    • F04B49/18F02M45/063F02M59/16F02M59/26
    • A high pressure fuel pump having a variable fuel injection rate, including a pump body, a pump cylinder formed in the pump body and a piston reciprocable within the pump cylinder, which defmes a pressurization chamber (120). The pump piston (106) has a reduced diameter portion which provides a primary piston (112). A piston annulus is slidably mounted thereon and provides a secondary piston (116). An annular actuation chamber (122) adjoins the secondary piston (116) opposite the pressurization chamber (120). An actuation passage is provided between a return fuel drain and the actuation chamber (122), which is selectively open or closed passively by pump piston (106) movement and/or dynamically by operation of an actuation solenoid valve (128). If the actuation chamber passage (124) is open, then during the pressurization stroke the secondary piston (116) will remain stationary relative to the pump body, but if it is closed then the secondary piston (116) must stroke in unison with the primary piston (112).
    • 一种具有可变燃料喷射速率的高压燃料泵,包括泵体,形成在泵体内的泵筒和可在泵缸内往复运动的活塞,其限定加压室(120)。 泵活塞(106)具有减小的直径部分,其提供主活塞(112)。 活塞环可滑动地安装在其上并提供第二活塞(116)。 环形致动室(122)邻接与加压室(120)相对的次级活塞(116)。 致动通道设置在回流燃料排放口和致动室(122)之间,该致动室通过泵活塞(106)的运动和/或动态地通过致动电磁阀(128)的动作而被动地选择性地打开或关闭。 如果致动室通道(124)打开,则在加压行程期间,次级活塞(116)将相对于泵体保持静止,但是如果其被关闭,则第二活塞(116)必须与主要活塞 活塞(112)。
    • 6. 发明公开
    • Variable injection rate high pressure fuel pump
    • 可变喷射率高压燃油泵
    • EP1418335A3
    • 2008-04-16
    • EP03021861.4
    • 2003-09-26
    • Electro-Motive Diesel, Inc.
    • Gottemoller, PaulPoola, Ramesh B.Tupek, Richard WayneGoetzke, Michael Barry
    • F02M59/16F02M59/26F02M45/06
    • F04B49/18F02M45/063F02M59/16F02M59/26
    • A high pressure fuel pump having a variable fuel injection rate, including a pump body, a pump cylinder formed in the pump body and a piston reciprocable within the pump cylinder, which defines a pressurization chamber (120). The pump piston (106) has a reduced diameter portion which provides a primary piston (112). A piston annulus is slidably mounted thereon and provides a secondary piston (116). An annular actuation chamber (122) adjoins the secondary piston (116) opposite the pressurization chamber (120). An actuation passage (124) is provided between a return fuel drain and the ctuation chamber (122), which is selectively open or closed passively by pump piston (106) movement and/or dynamically by operation of an actuation solenoid valve (128). If the actuation chamber passage (124) is open, then during the pressurization stroke the secondary piston (116) will remain stationary relative to the pump body, but if it is closed then the secondary piston (116) must stroke in unison with the primary piston (112).
    • 一种具有可变燃料喷射速率的高压燃料泵,其包括泵体,形成在泵体中的泵缸和可在泵缸内往复运动的活塞,活塞限定加压室(120)。 泵活塞(106)具有减小直径的部分,其提供主活塞(112)。 活塞环可滑动地安装在其上并提供第二活塞(116)。 环形致动室(122)与加压室(120)相对地邻接次级活塞(116)。 在返回燃料排出口和设备室(122)之间提供致动通道(124),其通过泵活塞(106)移动被动地选择性地打开或关闭和/或通过操作致动电磁阀(128)动态地打开或关闭。 如果致动室通道(124)打开,则在增压冲程期间,次活塞(116)将相对于泵体保持静止,但是如果其关闭,则次活塞(116)必须与主活塞 活塞(112)。