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    • 1. 发明申请
    • REFORMER ENHANCED ALCOHOL ENGINE
    • 改装增强酒精发动机
    • WO2013055673A1
    • 2013-04-18
    • PCT/US2012/059332
    • 2012-10-09
    • MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    • COHN, Daniel, R.BROMBERG, Leslie
    • F02D19/08F02D19/06
    • F02B43/04C01B3/366C01B2203/1217F02D19/0655F02D19/084Y02T10/32Y02T10/36
    • Reformer-enhanced alcohol engine system. The engine system includes a spark-ignited alcohol engine having a compression ratio in the range of 13-15 and includes a turbo charger or supercharger operatively connected to the engine to provide a pressure boost of at least about 2.5 times atmospheric pressure to cylinders of the engine. A source of alcohol is provided for injection into the engine. A reformer is provided including a low-temperature reforming catalyst in a heat transfer relation with exhaust gas from the engine and arranged to receive alcohol from the alcohol source for reforming the alcohol into a hydrogen-rich gas. Means are provided for injecting the hydrogen-rich gas into the engine and a knock sensor detects knock in the engine. A fuel management control unit is provided which is responsive to the knock sensor to apportion the ratio of alcohol injected into the engine to hydrogen-rich gas injected into the engine. The engine of the invention can provide a 15-25% efficiency gain in a methanol-fueled spark ignition engine relative to a diesel engine in a typical drive cycle.
    • 改良型酒精发动机系统。 发动机系统包括具有在13-15范围内的压缩比的火花点燃酒精发动机,并且包括可操作地连接到发动机的涡轮增压器或增压器,以向气缸的气缸提供至少大约2.5倍的压力升压 发动机。 酒精提供用于注射到发动机中。 提供了一种重整器,其包括与来自发动机的废气的传热关系的低温重整催化剂,并且被配置成从醇源接收醇以将醇重整成富氢气体。 提供了用于将富氢气体注入发动机并且爆震传感器检测发动机爆震的装置。 提供了一种燃料管理控制单元,其响应于爆震传感器以将注入发动机的醇的比例分配给注入发动机的富氢气体。 本发明的发动机可以在典型的驱动循环中相对于柴油发动机在甲醇燃料的火花点火发动机中提供15-25%的效率增益。
    • 6. 发明申请
    • HIGH COMPRESSION RATIO, HYDROGEN ENHANCED GASOLINE ENGINE SYSTEM
    • 高压缩比,加氢汽油发动机系统
    • WO2003042521A2
    • 2003-05-22
    • PCT/US2002/035623
    • 2002-11-06
    • MASSACHUSETTS INSTITUTE OF TECHNOLOGYCOHN, Daniel, R.BROMBERG, LeslieRABINOVICH, AlexanderHEYWOOD, John, B.
    • COHN, Daniel, R.BROMBERG, LeslieRABINOVICH, AlexanderHEYWOOD, John, B.
    • F02D
    • F02D41/005F02B1/12F02B43/10F02B47/04F02B51/00F02D19/0644F02D19/0671F02D19/081F02D35/027F02D41/0025F02D41/0027F02D41/3023F02D2250/36F02M25/10F02M26/13Y02T10/32Y02T10/36Y02T10/47Y10S123/12
    • A hydrogen enhanced gasoline engine system using high compression ratio is optimized to minimize NOx emissions, exhaust aftertreatment catalyst requirements, hydrogen requirements, engine efficiency and cost. In one mode of operation the engine is operated very lean (equivalence ratio O = 0.4 to 0.7) at lower levels of power. Very lean operation reduces NOx to very low levels. A control system is used to increase equivalence ratio at increased torque or power requirements while avoiding the knock that would be produced by high compression ratio operation. The increased equivalence ratio reduces the amount of hydrogen required to extend the lean limit in order to avoid misfire and increases torque and power. Reduced hydrogen requirements at high power can significantly reduce the cost and size of onboard hydrogen generator technology. Increased in-cylinder turbulence and stratified hydrogen injection can be used to minimize hydrogen requirements for operation at a given equivalence ratio value. In another embodiment, vehicle NOx emissions can be suppressed to low levels and knock can be prevented by use of hydrogen enhanced exhaust gas recirculation (EGR) at all power levels with stoichiometric operation and a 3-way exhaust aftertreatment catalyst. Alternatively, EGR can be used with lean operation to keep NOx at low levels while the equivalence ratio is increased to provide higher torque and power capability. The effect of reduced peak power due to charge dilution to avoid knock can be minimized by boosting, using turbocharging or supercharging.
    • 优化了使用高压缩比的氢气增强型汽油机系统,以最大限度地减少NOx排放,废气后处理催化剂要求,氢气需求,发动机效率和成本。 在一种操作模式中,发动机在较低功率水平下运行非常稀薄(当量比O = 0.4至0.7)。 非常精益操作将NOx降低到非常低的水平。 控制系统用于在增加转矩或功率要求的同时提高当量比,同时避免由高压缩比操作产生的爆震。 增加的当量比减少了扩大稀薄极限所需的氢气量,以避免失火并增加扭矩和功率。 在大功率下降低氢气需求可显着降低机载氢发生器技术的成本和尺寸。 可以使用增加的缸内湍流和分层氢气喷射来最小化在给定的当量比值下操作的氢气需求。 在另一个实施方案中,车辆NOx排放可以被抑制到低水平,并且可以通过使用具有化学计量操作的所有功率水平的氢增强废气再循环(EGR)和三向排气后处理催化剂来防止爆震。 或者,EGR可以用于稀薄运行,以将NOx保持在低水平,同时增加当量比以提供更高的扭矩和功率能力。 通过使用涡轮增压或增压来升压,可以将由于充电稀释而引起的峰值功率降低以避免爆震的效果最小化。
    • 8. 发明申请
    • COMPACT HIGH PERFORMANCE CHEMICAL DETECTOR
    • 紧凑的高性能化学检测器
    • WO2008036439A2
    • 2008-03-27
    • PCT/US2007/068720
    • 2007-05-11
    • MASSACHUSETTS INSTITUTE OF TECHNOLOGYBROMBERG, LeslieCOHN, Daniel, R.
    • BROMBERG, LeslieCOHN, Daniel, R.
    • B01D59/44
    • G01N27/624
    • Ion mobility spectrometer. The spectrometer includes an enclosed region having a gas with a selected chemical species contained therein. An energy source ionizes the gas and the chemical species. Spaced apart electrodes generate high frequency and DC electric fields across the enclosed region and circuitry is provided for generating voltage waveforms on the electrodes. The voltage waveforms include a symmetric RF field to minimize ion loss and to prevent clustering of the ions with water molecules during an ion buildup phase. A DC and asymmetric, non-uniform RF field is provided to separate and focus the ions in the region during an ion separation phase. Finally, a changing DC or RF field causes the ionized chemical species to move to the electrodes and read-out circuitry responds to current in the electrodes to indicate the presence and/or amount of the chemical species.
    • 离子迁移谱仪。 光谱仪包括具有包含其中选择的化学物质的气体的封闭区域。 能量源使气体和化学物质离子化。 隔开的电极在封闭区域产生高频和直流电场,并且提供用于在电极上产生电压波形的电路。 电压波形包括对称RF场,以最小化离子损失,并防止在离子累积阶段期间离子与水分子的聚集。 提供DC和非对称的不均匀RF场以在离子分离阶段期间分离和聚焦该区域中的离子。 最后,变化的DC或RF场导致电离化学物质移动到电极,并且读出电路对电极中的电流进行响应以指示化学物质的存在和/或量。