公开(公告)号：US20060042232A1

公开(公告)日：2006-03-02

申请号：US10918581

申请日：2004-08-13

申请人： Stephen Fulcher ,  Richard Jess ,  Patrick Risse ,  Stuart Smith ,  James Eng

发明人： Stephen Fulcher ,  Richard Jess ,  Patrick Risse ,  Stuart Smith ,  James Eng

IPC分类号： F01N3/00

CPC分类号： F02D21/10

摘要： An engine control system and method maintains an optimum exhaust fuel to air ratio in an internal combustion engine. A secondary air injection (SAI) pressure is measured in an SAI system. The SAI pressure measurement is converted into an SAI flow value. A fuel compensation value is obtained based on the SAI flow value. Fuel delivery is compensated to the engine based on the fuel compensation value. In a second embodiment, the fuel compensation value is obtained based on the SAI pressure measurement. Fuel delivery is compensated to the engine based on the fuel compensation value. In a third embodiment, a primary flow value is calculated at an air intake of the engine. A fuel compensation value is calculated based on the SAI flow and primary flow values. Fuel delivery to the engine is compensated based on the fuel compensation value.

摘要翻译： 发动机控制系统和方法在内燃机中保持最佳排气燃料与空气的比例。 在SAI系统中测量二次空气喷射（SAI）压力。 将SAI压力测量值转换为SAI流量值。 基于SAI流量值获得燃料补偿值。 基于燃料补偿值对发动机进行燃料补给。 在第二实施例中，基于SAI压力测量获得燃料补偿值。 基于燃料补偿值对发动机进行燃料补给。 在第三实施例中，在发动机的进气口处计算主流量值。 基于SAI流量和主流量值计算燃料补偿值。 基于燃料补偿值来补偿向发动机的输送。

公开(公告)号：US20070119417A1

公开(公告)日：2007-05-31

申请号：US11538085

申请日：2006-10-03

申请人： James Eng ,  William Leppard ,  Paul Najt ,  Tang-Wei Kuo

发明人： James Eng ,  William Leppard ,  Paul Najt ,  Tang-Wei Kuo

IPC分类号： F02B5/00 ,  F01L1/34 ,  F02M25/07 ,  F02B47/08

CPC分类号： 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

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20060005818A1

公开(公告)日：2006-01-12

申请号：US11064320

申请日：2005-02-23

申请人： Tang-Wei Kuo ,  Paul Najt ,  James Eng ,  Junseok Chang ,  Zoran Filipi ,  Dionissios Assanis ,  Orgun Guralp

发明人： Tang-Wei Kuo ,  Paul Najt ,  James Eng ,  Junseok Chang ,  Zoran Filipi ,  Dionissios Assanis ,  Orgun Guralp

IPC分类号： F02M25/07 ,  F02B75/02 ,  F02B3/00

CPC分类号： F02D13/0207 ,  F02B1/12 ,  F02B23/101 ,  F02B31/085 ,  F02B2023/108 ,  F02B2075/125 ,  F02D13/0246 ,  F02D13/0273 ,  F02D41/3035 ,  F02M26/01 ,  Y02T10/123 ,  Y02T10/18

摘要： 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.

公开(公告)号：US20060005806A1

公开(公告)日：2006-01-12

申请号：US10981971

申请日：2004-11-05

申请人： Tang-Wei Kuo ,  James Eng ,  Barry Brown

发明人： Tang-Wei Kuo ,  James Eng ,  Barry Brown

IPC分类号： F02B3/00 ,  F02M25/07 ,  F01L1/34

CPC分类号： 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

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20070107692A1

公开(公告)日：2007-05-17

申请号：US11398776

申请日：2006-04-06

申请人： Tang-Wei Kuo ,  Paul Najt ,  James Eng ,  Rodney Rask

发明人： Tang-Wei Kuo ,  Paul Najt ,  James Eng ,  Rodney Rask

IPC分类号： F02B5/00 ,  F02M7/00

CPC分类号： F02D41/3035 ,  F02B1/12 ,  F02B23/0672 ,  F02D13/0234 ,  F02D35/02 ,  F02D35/028 ,  F02D41/005 ,  F02D41/1467 ,  F02D2041/001 ,  Y02T10/125 ,  Y02T10/128 ,  Y02T10/18

摘要： 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.

公开(公告)号：US20070084449A1

公开(公告)日：2007-04-19

申请号：US11399640

申请日：2006-04-06

申请人： Paul Najt ,  Tang-Wei Kuo ,  James Eng ,  Rodney Rask

发明人： Paul Najt ,  Tang-Wei Kuo ,  James Eng ,  Rodney Rask

IPC分类号： F02B75/08 ,  F02F3/26 ,  F02B5/00

CPC分类号： F02F3/14 ,  F01L3/04 ,  F01L2101/02 ,  F01L2103/00 ,  F02B1/12 ,  F02B77/02 ,  F05C2251/04 ,  F05C2251/048 ,  Y02T10/128

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20060196467A1

公开(公告)日：2006-09-07

申请号：US11366217

申请日：2006-03-02

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

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

IPC分类号： F02B5/00 ,  F02M51/00 ,  F02B47/08

CPC分类号： 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

摘要： 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.

摘要翻译： 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。

公开(公告)号：US20060196469A1

公开(公告)日：2006-09-07

申请号：US11367050

申请日：2006-03-02

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

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

IPC分类号： F02D43/00

CPC分类号： F02D41/402 ,  F02B1/12 ,  F02B23/101 ,  F02B2075/125 ,  F02D9/02 ,  F02D13/0265 ,  F02D41/0002 ,  F02D41/0052 ,  F02D41/006 ,  F02D41/0065 ,  F02D41/144 ,  F02D41/3035 ,  F02D41/3047 ,  F02D41/3064 ,  F02M26/01 ,  F02M26/13 ,  Y02T10/123 ,  Y02T10/128 ,  Y02T10/18 ,  Y02T10/44 ,  Y02T10/47

摘要： A method is provided for control of a direct-injection engine operated with controlled auto-ignition (HCCI) during load transient operations between modes of lean combustion low load (HCCI/Lean) and stiochiometric combustion medium load (HCCI/Stoich.). The method includes 1) operating the engine at steady state, within a homogeneous charge compression-ignition (HCCI) load range, with fuel-air-exhaust gas mixtures at predetermined conditions, for each speed and load, and controlling the engine during changes of operating mode between one to another of the HCCI/Stoich. medium load mode and the HCCI/Lean lower load mode by synchronizing change rates of predetermined controlled inputs to the current engine fueling change rate.

摘要翻译： 提供了一种用于控制在稀燃燃烧低负载（HCCI / Lean）和诊断燃烧介质载荷（HCCI / Stoich）的模式之间的负载瞬变操作期间用受控自动点火（HCCI）操作的直接喷射发动机的方法。 该方法包括：1）在均匀充气压缩点火（HCCI）负载范围内，对于每个速度和负载，在预定条件下，以燃料 - 空气 - 废气混合物在稳定状态下操作发动机，以及在发动机变化期间控制发动机 HCCI / Stoich之间的操作模式。 通过将预定的受控输入的变化速率与当前的发动机加油变化率进行同步，来实现中负载模式和HCCI /精益低负荷模式。

公开(公告)号：US20060016422A1

公开(公告)日：2006-01-26

申请号：US10899456

申请日：2004-07-26

申请人： Tang-Wei Kuo ,  Barry Brown ,  Paul Najt ,  James Eng

发明人： Tang-Wei Kuo ,  Barry Brown ,  Paul Najt ,  James Eng

IPC分类号： F02B3/00

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。

公开(公告)号：US20060016420A1

公开(公告)日：2006-01-26

申请号：US10899442

申请日：2004-07-26

申请人： Tang-Wei Kuo ,  Barry Brown ,  Paul Najt ,  James Eng ,  David Cleary

发明人： Tang-Wei Kuo ,  Barry Brown ,  Paul Najt ,  James Eng ,  David Cleary

IPC分类号： F02B3/00

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.