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    • 12. 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。
    • 17. 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。