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    Method for transition between controlled auto-ignition and spark ignition modes in direct fuel injection engines
    3.
    发明授权
    Method for transition between controlled auto-ignition and spark ignition modes in direct fuel injection engines 有权
    直喷式发动机控制自动点火和火花点火模式之间转换的方法

    公开(公告)号：US07370616B2

    公开(公告)日：2008-05-13

    申请号：US11367045

    申请日：2006-03-02

    申请人： Tang-Wei Kuo ,  Zongxuan Sun ,  Jun-Mo Kang ,  James A. Eng ,  Chen-Fang Chang ,  Barry L. Brown ,  Paul M. Najt ,  Man-Feng Chang

    发明人： Tang-Wei Kuo ,  Zongxuan Sun ,  Jun-Mo Kang ,  James A. Eng ,  Chen-Fang Chang ,  Barry L. Brown ,  Paul M. Najt ,  Man-Feng Chang

    IPC分类号： F02B17/00 ,  F02B5/00 ,  F02M25/07 ,  F01L1/34

    CPC分类号： F01L1/344 ,  F01L13/0015 ,  F02B1/12 ,  F02B17/005 ,  F02D11/10 ,  F02D13/0207 ,  F02D13/0219 ,  F02D13/0265 ,  F02D41/005 ,  F02D41/3035 ,  F02D41/3064 ,  F02D41/402 ,  F02D2041/001 ,  Y02T10/128 ,  Y02T10/18 ,  Y02T10/42

    摘要： A method is provided for control of transition between combustion modes of a direct-injection engine operable in a homogeneous charge compression ignition (HCCI) mode at lower loads and a spark ignition flame propagation (SI) mode at higher loads. The engine includes a variable valve actuation system including two-step high and low lift valve actuation and separate cam phasing for both intake and exhaust valves. The method includes operating the engine at steady state, with fuel-air-exhaust gas mixtures at predetermined conditions, for each speed and load, and controlling the engine during mode changes between the HCCI mode and the SI mode by switching the exhaust and intake valves between low lift for HCCI operation and high lift for SI operation. High load may be an SI throttled mode with an intermediate unthrottled mode (SI/NTLC} in which transition between HCCI and SI/NTLC modes requires switching only the exhaust valve lift and transition between SI/NTLC and SI throttled modes requires switching only the intake valve lift, with predetermined phase adjustments in the valve timing phasing.

    摘要翻译： 提供了一种用于控制在较低负载下以均质充气压缩点火（HCCI）模式操作的直喷式发动机的燃烧模式之间的过渡和在较高负载下的火花点火火焰传播（SI）模式下的过渡的方法。 发动机包括可变气门驱动系统，其包括两步高和低升程气门致动以及用于进气门和排气门的单独的凸轮定相。 该方法包括：对于每个速度和负载，在预定条件下以稳定状态操作发动机，并且在HCCI模式和SI模式之间的模式转换期间通过切换排气和进气门来控制发动机 在HCCI操作的低电梯和SI操作的高电梯之间。 高负载可能是具有中间非节流模式（SI / NTLC）的SI节流模式，其中HCCI和SI / NTLC模式之间的转换只需要切换排气门升程，SI / NTLC和SI节流模式之间的转换只需要切换进气 气门升程，在气门正时相定相调整。

    Method for mid load operation of auto-ignition combustion
    7.
    发明授权
    Method for mid load operation of auto-ignition combustion 有权
    自动点火燃烧中负荷运行方法

    公开(公告)号：US06994072B2

    公开(公告)日：2006-02-07

    申请号：US10997661

    申请日：2004-11-24

    申请人： Tang-Wei Kuo ,  Barry L. Brown ,  James A. Eng ,  Paul M. Najt

    发明人： Tang-Wei Kuo ,  Barry L. Brown ,  James A. Eng ,  Paul M. Najt

    IPC分类号： F02B17/00

    CPC分类号： F02D41/3047 ,  F02B1/12 ,  F02B17/005 ,  F02B23/101 ,  F02B2075/125 ,  F02D13/0207 ,  F02D13/0242 ,  F02D13/0265 ,  F02D13/0273 ,  F02D41/006 ,  F02D41/402 ,  F02D2041/001 ,  F02M26/01 ,  F02M26/13 ,  Y02T10/123 ,  Y02T10/18 ,  Y02T10/42 ,  Y02T10/47

    摘要： A method is disclosed for expanding the mid load operation limit in a four-stroke gasoline direct-injection controlled auto-ignition combustion engine. A system is employed for variably actuating the intake and exhaust valves and for operating the valves with an exhaust re-compression or exhaust re-breathing valve strategy. A spark plug is provided. A fuel injector having multiple injection capability is employed. A first fuel charge is injected into the combustion chamber to form a lean air-fuel mixture. A second fuel charge is injected into the combustion chamber to form a stratified air-fuel mixture having an ignitable mixture located near the spark plug. The ignitable mixture is ignited at the spark gap, thereby causing spark-ignition combustion that causes a sufficient increase in chamber pressure and temperature to trigger auto-ignition of the lean air-fuel mixture, resulting in the obtaining of a higher engine load before a pressure rise rate in the combustion chamber exceeds a prescribed threshold value.

    摘要翻译： 公开了一种用于扩大四冲程汽油直喷式自动点火内燃机的中负荷运行极限的方法。 采用系统来可变地致动进气门和排气门，并且用排气再压缩或排气再呼吸阀策略操作阀。 提供火花塞。 采用具有多个喷射能力的燃料喷射器。 将第一燃料装料注入到燃烧室中以形成稀薄的空气 - 燃料混合物。 第二燃料装料被注入到燃烧室中以形成具有位于火花塞附近的可燃混合物的分层空气 - 燃料混合物。 可点燃的混合物在火花隙处点燃，从而引起火花点火燃烧，导致室压力和温度的充分增加，以引起稀空燃混合物的自动点火，导致在一个 燃烧室内的压力上升率超过规定的阈值。

    Valve and fueling strategy for operating a controlled auto-ignition four-stroke internal combustion engine
    8.
    发明授权
    Valve and fueling strategy for operating a controlled auto-ignition four-stroke internal combustion engine 有权
    用于操作受控自动点火四冲程内燃机的阀和加油策略

    公开(公告)号：US07152559B2

    公开(公告)日：2006-12-26

    申请号：US10899442

    申请日：2004-07-26

    申请人： Tang-Wei Kuo ,  Barry L. Brown ,  Paul M. Najt ,  James A. Eng ,  David J. Cleary

    发明人： Tang-Wei Kuo ,  Barry L. Brown ,  Paul M. Najt ,  James A. Eng ,  David J. Cleary

    IPC分类号： F02B3/04 ,  F02M25/07

    CPC分类号： F02D13/0207 ,  F02B1/12 ,  F02B2075/027 ,  F02B2075/125 ,  F02D13/0238 ,  F02D13/0242 ,  F02D13/0273 ,  F02D41/402 ,  Y02T10/123 ,  Y02T10/18 ,  Y02T10/42 ,  Y02T10/44

    摘要： Part load operating point for a controlled auto-ignition four-stroke internal combustion engine is reduced without compromising combustion stability through a valve control operative to establish low pressure conditions within the combustion chamber into which fuel and exhaust gases are introduced. Combustion chamber pressures during the intake cycle are controlled lower as engine load decreases. Combusted gases are recirculated into the combustion chamber through a variety of internal and external recirculation mechanizations. A split-injection fuel control is implemented during low part load operation whereas a single-injection fuel control is implemented during intermediate and high part load operation. Split-injections are characterized by lean fuel/air ratios and single-injections are characterized by either lean or stoichiometric fuel/air ratios. Controlled autoignition is thereby enabled through an extended range of engine loads while maintaining acceptable combustion stability and emissions.

    摘要翻译： 受控自动点火四冲程内燃机的部分负载工作点在不损害燃烧稳定性的情况下被减少，通过阀门控制来操作，以便在引入燃料和废气的燃烧室内建立低压条件。 进气循环期间的燃烧室压力随着发动机负荷的降低而受到控制。 燃烧的气体通过各种内部和外部再循环机械化再循环进入燃烧室。 在低部分负载操作期间实施分体喷射燃料控制，而在中部和高部分负载操作期间实施单次喷射燃料控制。 分离注射的特征在于贫燃料/空气比，单次注射的特征在于稀燃或化学计量的燃料/空气比。 因此，通过扩展的发动机负载范围能够实现受控自燃，同时保持可接受的燃烧稳定性和排放。

    Valve and fueling strategy for operating a controlled auto-ignition four-stroke internal combustion engine
    9.
    发明授权
    Valve and fueling strategy for operating a controlled auto-ignition four-stroke internal combustion engine 有权
    用于操作受控自动点火四冲程内燃机的阀和加油策略

    公开(公告)号：US07021277B2

    公开(公告)日：2006-04-04

    申请号：US10899456

    申请日：2004-07-26

    申请人： Tang-Wei Kuo ,  Barry L. Brown ,  Paul M. Najt ,  James A. Eng

    发明人： Tang-Wei Kuo ,  Barry L. Brown ,  Paul M. Najt ,  James A. Eng

    IPC分类号： F02B3/04 ,  F02M25/07

    CPC分类号： F02D13/0215 ,  F02B1/12 ,  F02B2075/027 ,  F02B2075/125 ,  F02D13/0219 ,  F02D13/0265 ,  F02D13/0273 ,  F02D41/3041 ,  F02D41/402 ,  F02M26/01 ,  Y02T10/123 ,  Y02T10/18 ,  Y02T10/44

    摘要： Part load operating point for a controlled auto-ignition four-stroke internal combustion engine is reduced without compromising combustion stability through load dependent valve controls and fueling strategies. Optimal fuel economy is achieved by employing negative valve overlap to trap and re-compress combusted gases below a predetermined engine load and employing exhaust gas re-breathing above the predetermined engine load. Split-injection fuel controls are implemented during low and intermediate part load operation whereas a single-injection fuel control is implemented during high part load operation. Split-injections are characterized by lean fuel/air ratios and single-injections are characterized by either lean or stoichiometric fuel/air ratios. Controlled autoignition is thereby enabled through an extended range of engine loads while maintaining acceptable combustion stability and emissions at optimal fuel economy.

    摘要翻译： 受控自动点火四冲程内燃机的零件负载工作点在不影响通过负载相关阀控制和加油策略的燃烧稳定性的同时减少。 通过使用负阀重叠来捕获并重新压缩低于预定发动机负荷的燃烧气体并且使用在预定发动机负载上方重新呼吸的排气来实现最佳燃料经济性。 在低和中间部分负载操作期间实施分体喷射燃料控制，而在高部分负载操作期间实施单次喷射燃料控制。 分离注射的特征在于贫燃料/空气比，单次注射的特征在于稀燃或化学计量的燃料/空气比。 因此，通过扩展的发动机负载范围可实现受控自燃，同时在最佳燃油经济性的同时保持可接受的燃烧稳定性和排放。