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公开(公告)号：US20060005804A1
公开(公告)日：2006-01-12
申请号：US10997661
申请日：2004-11-24
Applicant: Tang-Wei Kuo , Barry Brown , James Eng , Paul Najt
Inventor： Tang-Wei Kuo , Barry Brown , James Eng , Paul Najt
IPC: F02B17/00
CPC classification number: 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
Abstract: 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.
Abstract translation: 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。
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12.发明申请Valve 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门策略公开(公告)号：US20050000478A1
公开(公告)日：2005-01-06
申请号：US10611845
申请日：2003-07-01
Applicant: Tang-Wei Kuo , Barry Brown , James Eng , Paul Najt
Inventor： Tang-Wei Kuo , Barry Brown , James Eng , Paul Najt
CPC classification number: F02D13/0215 , F02B1/12 , F02B41/00 , F02B75/02 , F02B2075/027 , F02B2075/125 , F02D13/0246 , F02D13/0265 , F02D13/0273 , F02D41/3035 , F02D2041/001 , F02D2200/0406 , F02D2200/0414 , F02M26/01 , Y02T10/18
Abstract: Low 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 sub-atmospheric pressure conditions within the combustion chamber into which fuel and exhaust gases are introduced.
Abstract translation: 用于受控自动点火四冲程内燃机的低负载工作点被减少，而不会通过阀控制而不损害燃烧稳定性，该阀控制用于在引入燃料和废气的燃烧室内建立次大气压力条件。
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公开(公告)号：US20070119417A1
公开(公告)日：2007-05-31
申请号：US11538085
申请日：2006-10-03
Applicant: James Eng , William Leppard , Paul Najt , Tang-Wei Kuo
Inventor： James Eng , William Leppard , Paul Najt , Tang-Wei Kuo
CPC classification number: F01L1/34 , F02D13/0265 , F02D35/023 , F02D35/028 , F02D41/0052 , F02D41/006 , F02D41/3035 , F02D41/40 , F02D2041/001 , F02M26/01 , Y02T10/128 , Y02T10/18 , Y02T10/47
Abstract: Operation of a homogeneous charge compression ignition engine is adapted to fuel variations. A variable valve actuating system is employed to effect conditions conducive to homogeneous charge compression ignition operation. Nominal valve timing is selected and adjustments thereto are made based on deviations in combustion phasing from a desired combustion phasing. Fuel delivery timing and quantity are adjusted once valve timing authority limits are reached to achieve further combustion phasing improvement.
Abstract translation: 均质充气压缩点火发动机的操作适于燃料变化。 采用可变阀致动系统来实现有利于均匀充气压缩点火操作的条件。 选择标称气门正时，并根据期望的燃烧定相的燃烧定相的偏差进行调节。 一旦达到阀门限位限制，燃油分配时间和数量就进行了调整，以达到进一步的燃烧阶段改进。
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Patent Agency Ranking
公开(公告)号：US20060005818A1
公开(公告)日：2006-01-12
申请号：US11064320
申请日：2005-02-23
Applicant: Tang-Wei Kuo , Paul Najt , James Eng , Junseok Chang , Zoran Filipi , Dionissios Assanis , Orgun Guralp
Inventor： Tang-Wei Kuo , Paul Najt , James Eng , Junseok Chang , Zoran Filipi , Dionissios Assanis , Orgun Guralp
CPC classification number: F02D13/0207 , F02B1/12 , F02B23/101 , F02B31/085 , F02B2023/108 , F02B2075/125 , F02D13/0246 , F02D13/0273 , F02D41/3035 , F02M26/01 , Y02T10/123 , Y02T10/18
Abstract: A method is disclosed for expanding the mid load range of a four-stroke gasoline direct-injection controlled auto-ignition combustion engine. The engine includes at least one cylinder containing a piston reciprocably connected with a crank and defining a variable volume combustion chamber including an intake valve controlling communication with an air intake and an exhaust valve controlling communication with an exhaust outlet. A system is employed for variably actuating the intake and exhaust valves. The valve actuating system is employable to operate the intake and exhaust valves with an exhaust re-compression or an exhaust re-breathing valve strategy. A reservoir chamber in communication with the combustion chamber is provided for temporary holding of residual burned gas. Residual burned gas in the combustion chamber and the exhaust outlet enters into the reservoir chamber and then loses thermal energy while in the reservoir chamber before being drawn back into the combustion chamber.
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公开(公告)号：US20060005806A1
公开(公告)日：2006-01-12
申请号：US10981971
申请日：2004-11-05
Applicant: Tang-Wei Kuo , James Eng , Barry Brown
Inventor： Tang-Wei Kuo , James Eng , Barry Brown
CPC classification number: F02D13/0207 , F01L13/0015 , F02B1/12 , F02B17/005 , F02B23/101 , F02B2023/108 , F02B2075/125 , F02D13/0246 , F02D13/0253 , F02D13/0265 , F02D13/0273 , F02D41/0002 , F02D41/006 , F02D41/008 , F02D41/3035 , F02D2041/001 , F02D2041/002 , F02M26/01 , Y02T10/123 , Y02T10/128 , Y02T10/18 , Y02T10/47
Abstract: A method is disclosed for controlling the air-fuel ratio in a four-stroke gasoline direct-injection controlled auto-ignition combustion. The engine is operated with two sequential pairs of expansion and contraction strokes during two revolutions of the engine crank, the two revolutions defining a combustion cycle. A system is employed for variably actuating the intake and exhaust valves and adjusting the flow of air and burned gases entering the combustion chamber. Adjusting the flow affects the resulting air-fuel ratio in the combustion chamber. The valve actuating system is employable to operate the intake and exhaust valves with an exhaust re-compression or an exhaust re-breathing valve strategy. Either valve strategy affects the air-fuel ratio in the cylinder and causes a proportion of burned gases from previous combustion cycles to be retained in the cylinder to provide the necessary conditions for auto-ignition of the air-fuel mixture.
Abstract translation: 公开了一种用于控制四冲程汽油直喷式自动点火燃烧中的空燃比的方法。 发动机在发动机曲柄两转期间以两对连续的膨胀和收缩行程操作，两圈限定燃烧循环。 采用系统来可变地致动进气门和排气门并调节进入燃烧室的空气和燃烧气体的流动。 调节流量会影响燃烧室内的空燃比。 阀致动系统可用于利用排气再压缩或排气再呼吸阀策略操作进气门和排气门。 任一阀门策略影响气缸中的空燃比，并且使来自先前燃烧循环的燃烧气体的比例保持在气缸中，以提供空燃混合物的自动点燃的必要条件。
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公开(公告)号：US20070107692A1
公开(公告)日：2007-05-17
申请号：US11398776
申请日：2006-04-06
Applicant: Tang-Wei Kuo , Paul Najt , James Eng , Rodney Rask
Inventor： Tang-Wei Kuo , Paul Najt , James Eng , Rodney Rask
CPC classification number: F02D41/3035 , F02B1/12 , F02B23/0672 , F02D13/0234 , F02D35/02 , F02D35/028 , F02D41/005 , F02D41/1467 , F02D2041/001 , Y02T10/125 , Y02T10/128 , Y02T10/18
Abstract: A method and apparatus for controlling engine operation to compensate for effects of combustion chamber deposits (CCDs) on combustion in a controlled auto-ignition engine is presented. Control methodologies comprise operation of variable valve actuation, fuel injection, spark timing, and intake air and coolant temperature to dynamically compensate for the effect of CCDs. A sensitivity to core gas temperature and chamber wall thermal conditions is shown, which is correlatable to in-cylinder CCD formation. Intake charge or coolant temperature control can be used to compensate for CCD effects. An engine control scheme relies upon a parametric input that quantifies instantaneous CCD formation in the combustion chamber. The result is further applicable to control pre-ignition in a conventional spark-ignition engine.
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17.发明申请Method to improve combustion stability in a controlled auto-ignition combustion engine 有权改善受控自动点火内燃机燃烧稳定性的方法公开(公告)号：US20070084449A1
公开(公告)日：2007-04-19
申请号：US11399640
申请日：2006-04-06
Applicant: Paul Najt , Tang-Wei Kuo , James Eng , Rodney Rask
Inventor： Paul Najt , Tang-Wei Kuo , James Eng , Rodney Rask
CPC classification number: F02F3/14 , F01L3/04 , F01L2101/02 , F01L2103/00 , F02B1/12 , F02B77/02 , F05C2251/04 , F05C2251/048 , Y02T10/128
Abstract: A method to control combustion in an HCCI engine, to mitigate effects of combustion chamber deposits is detailed. The method comprises applying a specific surface coating to a combustion chamber surface. The surface coating has thermal properties substantially similar to the combustion chamber deposits. The thermal properties preferably include a) thermal conductivity, b) heat capacity, and c) thermal diffusivity. Applying a surface coating results in a reduction of combustion variability due to variation in combustion chamber deposits, and an improvement on combustion stability at low loads due to reduced heat loss. A preferred thermally insulating surface coating includes thermal parameters of a heat capacity in a range of 0.03×106 J/m3-K to 2.0×106 J/m3-K; a thermal conductivity in a range of 0.25 W/m-K to 2.5 W/m-K; and, a thermal diffusivity in a range of 1×10−7 m2/s to 8×10−6 m2/s.
Abstract translation: 详细描述了一种控制HCCI发动机燃烧的方法，以减轻燃烧室沉积物的影响。 该方法包括将特定的表面涂层施加到燃烧室表面。 表面涂层具有与燃烧室沉积物基本相似的热性质。 热性质优选包括a）热导率，b）热容量，和c）热扩散率。 施加表面涂层导致由于燃烧室沉积物的变化而导致的燃烧变异性的降低，以及由于热损失减少而在低负载下的燃烧稳定性的改善。 优选的绝热表面涂层包括在0.03×10 -6 / K 3 -K至2.0×10 -6 / V范围内的热容的热参数 > J / m 3 -K; 在0.25W / m-K至2.5W / m-K的范围内的热导率; 并且在1×10 -7 / 2至8×10 -6 / 2范围内的热扩散率 / s。
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18.发明申请Load transient control methods for direct-injection engines with controlled auto-ignition combustion 有权对具有可控自动点火燃烧的直喷发动机的负载瞬态控制方法公开(公告)号：US20060196467A1
公开(公告)日：2006-09-07
申请号：US11366217
申请日：2006-03-02
Applicant: Jun-Mo Kang , Chen-Fang Chang , Zongxuan Sun , Tang-Wei Kuo , James Eng , Barry Brown , Paul Najt , Man-Feng Chang
Inventor： Jun-Mo Kang , Chen-Fang Chang , Zongxuan Sun , Tang-Wei Kuo , James Eng , Barry Brown , Paul Najt , Man-Feng Chang
CPC classification number: F02B47/08 , F02B1/12 , F02B23/101 , F02B2075/125 , F02B2275/14 , F02D9/02 , F02D13/0215 , F02D13/0219 , F02D13/0265 , F02D41/0052 , F02D41/006 , F02D41/0065 , F02D41/107 , F02D41/126 , F02D41/3035 , F02D41/3064 , F02D41/402 , F02D2041/001 , F02D2041/141 , F02D2200/0614 , F02M26/01 , F02M26/13 , Y02T10/123 , Y02T10/128 , Y02T10/18 , Y02T10/47
Abstract: A direct injection controlled auto-ignition engine is operated at steady state, within a homogeneous charge compression-ignition (HCCI) load range and with fuel-air-diluent mixtures at predetermined conditions, for each speed and load, of engine control inputs, including at least fueling mass flow rate, injection timing (FI), spark timing (SI) and exhaust recompression obtained by negative valve overlap (NVO). During load change rates below a predetermined threshold, SI, FI and NVO change rates are synchronized to current changes in the fueling mass flow rate. For fast load increases above the threshold, the cylinder charge is temporarily enriched by increasing the percentage of residual gas or reducing the percentage of fresh air mass in the charge sufficiently to maintain auto-ignition temperature during the load change. This may be done by delaying NVO action for a predetermined speed-dependent number of engine cycles. At very low loads, stable fuel rate reduction may require an alternate method involving deceleration fuel cut-off followed by a step change during refire.
Abstract translation: 直喷式控制自动点火发动机在均匀充气压缩点火（HCCI）负载范围内以及燃料 - 空气 - 稀释剂混合物在预定条件下对于发动机控制输入的每个速度和负载运行，包括 至少燃料质量流量，喷射正时（FI），火花正时（SI）和通过负阀重叠获得的排气再压缩（NVO）。 在负载变化率低于预定阈值时，SI，FI和NVO变化率与加油质量流量当前的变化同步。 对于快速负载增加超过阈值，通过增加残余气体的百分比或减少充电中的新鲜空气质量百分比来充分地保持气缸充量，以在负载变化期间保持自燃温度，从而暂时增加气瓶充量。 这可以通过将NVO动作延迟到预定的速度相关数量的发动机循环来完成。 在非常低的负载下，稳定的燃油速率降低可能需要一种替代方法，包括减速燃料切断，然后在重新启动期间改变阶跃。
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