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

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

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。

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

IPC: F02B5/00 ,  F02M7/00

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.

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

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

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。

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

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

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。

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

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

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.

公开(公告)号：US20070107695A1

公开(公告)日：2007-05-17

申请号：US11399194

申请日：2006-04-06

Applicant: Tang-Wei Kuo ,  Paul Najt ,  James Eng ,  Rodney Rask ,  Orgun Guralp ,  Zoran Filipi ,  Dionissios Assanis ,  Mark Hoffman

Inventor： Tang-Wei Kuo ,  Paul Najt ,  James Eng ,  Rodney Rask ,  Orgun Guralp ,  Zoran Filipi ,  Dionissios Assanis ,  Mark Hoffman

IPC: F02B5/00 ,  F02M7/00

CPC classification number: F02B23/0672 ,  F02D13/0234 ,  F02D35/02 ,  F02D35/023 ,  F02D35/025 ,  F02D35/028 ,  Y02T10/125 ,  Y02T10/128 ,  Y02T10/18

Abstract: A control system and method to dynamically determine a parametric value for combustion chamber deposits (CCD), e.g. in a controlled auto-ignition engine, including in-situ evaluation of thickness of CCD, based on a sensor which monitors combustion. It includes a temperature sensor operative to monitor the combustion chamber, and a CCD parameter that is based upon a peak combustion temperature measured at a crank angle. A CCD parameter can also be determined utilizing an in-cylinder pressure monitor, wherein a combustion chamber deposit parameter is based upon crank angle location of a peak in-cylinder pressure parameter.

Abstract translation: 用于动态地确定燃烧室沉积物（CCD）的参数值的控制系统和方法，例如， 在受控自动点火发动机中，包括基于监测燃烧的传感器对CCD的厚度的原位评估。 它包括用于监测燃烧室的温度传感器和基于在曲柄角度下测量的峰值燃烧温度的CCD参数。 也可以使用缸内压力监测器来确定CCD参数，其中燃烧室沉积参数基于峰值缸内压力参数的曲柄角位置。

公开(公告)号：US20060243241A1

公开(公告)日：2006-11-02

申请号：US11386203

申请日：2006-03-22

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

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

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

CPC classification number: F02D13/0261 ,  F01L13/00 ,  F02B1/12 ,  F02B17/00 ,  F02B2075/125 ,  F02D13/0203 ,  F02D13/0207 ,  F02D13/0265 ,  F02D13/0273 ,  F02D35/023 ,  F02D35/028 ,  F02D41/0002 ,  F02D41/0052 ,  F02D41/006 ,  F02D41/3035 ,  F02D41/3064 ,  F02D41/402 ,  F02D2041/001 ,  F02M26/01 ,  Y02T10/123 ,  Y02T10/128 ,  Y02T10/18 ,  Y02T10/42 ,  Y02T10/47

Abstract: The present invention relates to methods for robust controlled auto-ignition and spark ignited combustion controls in gasoline direct-injection engines, including transients, using either exhaust re-breathing or a combination of exhaust re-compression and re-breathing valve strategy. These methods are capable of enabling engine operation with either lean of stoichiometric or stoichiometric air/fuel ratio for oxides of nitrogen (NOx) control, with varying exhaust gas recirculation (EGR) rates and throttle valve positions for knock control, and with a combination of homogeneous charge compression ignition (HCCI) and spark ignition (SI) combustion modes to optimize fuel economy over a wide range of engine operating conditions.

Abstract translation: 本发明涉及用于汽油直喷发动机中稳健的受控自动点火和火花点火燃烧控制的方法，包括使用排气再呼吸或排气再压缩和再呼吸阀策略的组合的瞬变。 这些方法能够实现发动机运行，其中氮气（NOx）控制的氧化物的化学计量或化学计量空气/燃料比为贫，具有改变的废气再循环（EGR）速率和用于爆震控制的节气门位置，以及 均质充气压缩点火（HCCI）和火花点火（SI）燃烧模式，以在广泛的发动机运行条件下优化燃油经济性。

公开(公告)号：US20060196468A1

公开(公告)日：2006-09-07

申请号：US11367047

申请日：2006-03-02

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

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

IPC: F02D43/00

CPC classification number: F02D41/3035 ,  F02B1/12 ,  F02B23/101 ,  F02B2075/125 ,  F02D13/0219 ,  F02D13/0265 ,  F02D37/02 ,  F02D41/0002 ,  F02D41/005 ,  F02D41/2416 ,  F02D41/3064 ,  F02D41/401 ,  F02D41/402 ,  F02D2041/141 ,  F02M26/01 ,  F02M26/13 ,  Y02T10/123 ,  Y02T10/128 ,  Y02T10/18 ,  Y02T10/44

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 injection timing (FI), spark timing (SI), throttle position, exhaust gas recirculation (EGR) valve setting and exhaust recompression obtained by negative valve overlap (NVO). During engine speed transients, the control inputs are synchronized to changes in the current engine speed, and also with any concurrent changes in the engine fueling rate. Inputs that are inactive during all or part of a speed change have a zero change rate while inactive. The method maintains robust auto-ignition combustion during speed transients with constant or variable fueling rates and with or without load changes.

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 至少喷气正时（FI），火花正时（SI），节气门位置，废气再循环（EGR）阀设定和通过负阀重叠（NVO）获得的排气再压缩。 在发动机转速瞬变期间，控制输入与当前发动机转速的变化同步，以及发动机加油速率的任何并发变化。 在全部或部分速度变化期间无效的输入在无效时具有零变化率。 该方法在具有恒定或可变加油速率和有或没有负载变化的速度瞬变期间保持稳定的自点火燃烧。

公开(公告)号：US20060196466A1

公开(公告)日：2006-09-07

申请号：US11367045

申请日：2006-03-02

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

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

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

CPC classification number: 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

Abstract: 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.

Abstract translation: 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。

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。