-
公开(公告)号：US10132238B2
公开(公告)日：2018-11-20
申请号：US13855363
申请日：2013-04-02
发明人： Zongxuan Sun , Ke Li , Ali Sadighi
摘要： Motion control of a hydraulic free-piston engine is achieved in order to enable advanced combustions such as low temperature combustion. To accomplish this, an active controller acts as a virtual crankshaft, which causes a piston to follow a reference trajectory using energy from a storage element. Given the periodic nature of free-piston engine motion, an advanced controller of the present invention is preferably of robust repetitive type that is capable of tracking periodic reference signals.
-
公开(公告)号：US09719474B2
公开(公告)日：2017-08-01
申请号：US14758882
申请日：2014-01-02
发明人： Zongxuan Sun , Chienshin Wu
CPC分类号： F02M63/0015 , F02M45/12 , F02M47/025 , F02M47/027 , F02M61/10 , F02M61/161 , F02M63/0068 , F02M63/0275 , F02M2547/001 , F02M2547/008
摘要： An injector is designed to provide continuously variable injection rate shaping. With a hydro-mechanical internal feedback mechanism, injector needle position can be determined by controlling a feedback valve's on/off timing. According to the needle position, an injection needle valve opening can be controlled, and then the injection flow rate can be delivered proportionally. Also in accordance with the present invention a CRDI systems are provided including injectors of the present invention, wherein results demonstrate that injector designs of the present invention not only achieve rate shaping capability but also solve the above-noted problems of the current CRDI system. Finally, an iterative learning controller has also been developed to track the desired injection rate, and an injection rate estimator is designed to realize a cycle to cycle feedback control.
-
公开(公告)号：US11078792B2
公开(公告)日：2021-08-03
申请号：US15607937
申请日：2017-05-30
发明人： Zongxuan Sun , Chen Zhang , Keyan Liu
摘要： The subject matter of this specification can be embodied in, among other things, a method for operating a hydraulic free piston engine includes receiving, at an engine controller for a hydraulic free piston engine, an energy parameter that is representative of an amount of fluid energy to be output by the engine, and a measured fluid pressure value of a fluid load of the engine, determining a piston trajectory of a piston within a hydraulic chamber of the engine, determining a fuel volume value and a servo valve actuation parameter, based on the energy parameter and the measured fluid pressure value, providing a fuel control signal to a fuel control device of the engine based on the fuel volume value, and providing, based on the servo valve actuation parameter and the piston trajectory, a servo valve control signal to a servo valve.
-
公开(公告)号：US10202897B2
公开(公告)日：2019-02-12
申请号：US14784243
申请日：2014-04-15
发明人： Zongxuan Sun , Ke Li
摘要： A free-piston (“FP”) engine is a type of internal combustion engine with no crankshaft, so that its piston trajectory is no longer constrained by the mechanical linkage. FP engines have a high potential in terms of energy saving given their simple structure, high modularity and high efficiency, among other attributes. One of the technical barriers that affect FP engine technology is a lack of precise piston trajectory control. For example, the presence of a transient period after a single combustion event can prevent the engine from continuous firing. The present subject matter provides a control scheme that can utilize a reference and control signal shifting technique to modify the tracking error and the control signal to reduce the transient period.
-
公开(公告)号：US20170350248A1
公开(公告)日：2017-12-07
申请号：US15607937
申请日：2017-05-30
发明人： Zongxuan Sun , Chen Zhang , Keyan Liu
CPC分类号： F01B11/02 , F01B11/08 , F02B71/02 , F02B71/045
摘要： The subject matter of this specification can be embodied in, among other things, a method for operating a hydraulic free piston engine includes receiving, at an engine controller for a hydraulic free piston engine, an energy parameter that is representative of an amount of fluid energy to be output by the engine, and a measured fluid pressure value of a fluid load of the engine, determining a piston trajectory of a piston within a hydraulic chamber of the engine, determining a fuel volume value and a servo valve actuation parameter, based on the energy parameter and the measured fluid pressure value, providing a fuel control signal to a fuel control device of the engine based on the fuel volume value, and providing, based on the servo valve actuation parameter and the piston trajectory, a servo valve control signal to a servo valve.
-
公开(公告)号：US20150337786A1
公开(公告)日：2015-11-26
申请号：US14758882
申请日：2014-01-02
发明人： Zongxuan Sun , Chienshin Wu
CPC分类号： F02M63/0015 , F02M45/12 , F02M47/025 , F02M47/027 , F02M61/10 , F02M61/161 , F02M63/0068 , F02M63/0275 , F02M2547/001 , F02M2547/008
摘要： An injector is designed to provide continuously variable injection rate shaping. With a hydro-mechanical internal feedback mechanism, injector needle position can be determined by controlling a feedback valve's on/off timing. According to the needle position, an injection needle valve opening can be controlled, and then the injection flow rate can be delivered proportionally. Also in accordance with the present invention a CRDI systems are provided including injectors of the present invention, wherein results demonstrate that injector designs of the present invention not only achieve rate shaping capability but also solve the above-noted problems of the current CRDI system. Finally, an iterative learning controller has also been developed to track the desired injection rate, and an injection rate estimator is designed to realize a cycle to cycle feedback control.
摘要翻译： 喷射器被设计成提供连续可变的喷射速率成形。 通过水力机械内部反馈机构，可以通过控制反馈阀的开/关定时来确定喷射器针位置。 根据针位置，可以控制注射针阀开口，然后可以成比例地输送注射流量。 根据本发明，还提供了包括本发明的喷射器的CRDI系统，其结果表明，本发明的喷射器设计不仅实现了速率整形能力，而且还解决了当前CRDI系统的上述问题。 最后，还开发了一种迭代学习控制器来跟踪所需的注入速率，并且注入速率估计器被设计成实现循环以循环反馈控制。
-
公开(公告)号：US20160032820A1
公开(公告)日：2016-02-04
申请号：US14784243
申请日：2014-04-15
发明人： Zongxuan Sun , Ke Li
CPC分类号： F02B71/00 , F01B11/00 , F02D35/023 , F02D41/009 , F02D41/1448 , F02D45/00 , F02D2200/0406 , F02D2200/1012
摘要： A free-piston (“FP”) engine is a type of internal combustion engine with no crankshaft, so that its piston trajectory is no longer constrained by the mechanical linkage. FP engines have a high potential in terms of energy saving given their simple structure, high modularity and high efficiency, among other attributes. One of the technical barriers that affect FP engine technology is a lack of precise piston trajectory control. For example, the presence of a transient period after a single combustion event can prevent the engine from continuous firing. The present subject matter provides a control scheme that can utilize a reference and control signal shifting technique to modify the tracking error and the control signal to reduce the transient period.
摘要翻译： 自由活塞（“FP”）发动机是一种没有曲轴的内燃机，因此其活塞轨迹不再受到机械联动的限制。 FP发动机具有结构简单，模块化程度高，效率高等优点，具有节能潜力。 影响FP发动机技术的技术障碍之一是缺乏精确的活塞轨迹控制。 例如，在单次燃烧事件之后的瞬态周期的存在可以防止发动机连续点火。 本主题提供了一种控制方案，其可以利用参考和控制信号移位技术来修改跟踪误差和控制信号以减少瞬态周期。
-
公开(公告)号：US20130298874A1
公开(公告)日：2013-11-14
申请号：US13855363
申请日：2013-04-02
发明人： Zongxuan Sun , Ke Li , Ali Sadighi
IPC分类号： F02B71/00
CPC分类号： F02B71/00 , F02B63/06 , F02B71/04 , F02B71/045 , F02D35/02 , F02D35/023 , F02D35/025 , F02D41/1497
摘要： Motion control of a hydraulic free-piston engine is achieved in order to enable advanced combustions such as low temperature combustion. To accomplish this, an active controller acts as a virtual crankshaft, which causes a piston to follow a reference trajectory using energy from a storage element. Given the periodic nature of free-piston engine motion, an advanced controller of the present invention is preferably of robust repetitive type that is capable of tracking periodic reference signals.
摘要翻译： 实现液压自由活塞发动机的运动控制，以实现高温燃烧，如低温燃烧。 为了实现这一点，主动控制器用作虚拟曲轴，其使活塞使用来自存储元件的能量来跟随参考轨迹。 鉴于自由活塞式发动机运动的周期性，本发明的先进控制器优选地是能够跟踪周期性参考信号的鲁棒重复类型。
-
-
-
-
-
-
-
搜索结果
8 条记录 (耗时 0.027 秒)
