公开(公告)号：US20220243644A1

公开(公告)日：2022-08-04

申请号：US17728242

申请日：2022-04-25

Applicant: Massachusetts Institute Of Technology

Inventor： Leslie Bromberg ,  Daniel R. Cohn

IPC: F02B19/12 ,  F02D19/08

Abstract: Optimized alcohol and plasma enhanced prechambers for engines powered by gasoline and other fuels are used to increase the range of prechamber operation and to reduce soot. The increased prechamber capability is employed to extend the limit of lean operation of the engines. It can also be used to extend the limit of heavy EGR operation and to enable higher RPM operation. The amount of alcohol used in the prechamber is preferably less than 2% of the fuel that is used in the engine cylinder. The alcohol for the prechamber can be entirely provided by onboard separation from a gasoline-alcohol fuel mixture.

公开(公告)号：US20220136449A1

公开(公告)日：2022-05-05

申请号：US17574057

申请日：2022-01-12

Applicant: Massachusetts Institute Of Technology

Inventor： Daniel R. Cohn ,  Leslie Bromberg

IPC: F02D19/06 ,  F02D41/00 ,  F02N11/08 ,  B60W10/08 ,  B60W30/188 ,  B60W10/10 ,  F02D19/08 ,  F02B19/12 ,  B60W10/06 ,  B60K6/46 ,  B60K6/24 ,  F02D19/12 ,  F02M25/025 ,  B60W10/26 ,  F02D29/02 ,  F02D15/00

Abstract: Spark ignition engine operation at higher RPM so as to reduce alcohol requirements in high efficiency alcohol enhanced gasoline engines is disclosed. Control of engine upspeeding (use of a higher ratio of engine RPM to wheel RPM) so as to achieve an alcohol reduction objective while limiting any decrease in efficiency is described. High RPM alcohol enhanced gasoline engine operation in plug-in series hybrid powertrains for heavy duty trucks and other vehicles is also described.

公开(公告)号：US10781760B2

公开(公告)日：2020-09-22

申请号：US16831044

申请日：2020-03-26

Applicant: Massachusetts Institute of Technology

Inventor： Leslie Bromberg ,  Daniel R. Cohn ,  John B. Heywood

IPC: F02D41/00 ,  F02B47/04 ,  F02B51/00 ,  F02D19/08 ,  F02D19/12 ,  F02D35/02 ,  F02M25/14 ,  F02M37/00 ,  F02D19/06 ,  F02B17/00 ,  F02D13/02 ,  F02D41/04 ,  F02D41/30

Abstract: Fuel management system for enhanced operation of a spark ignition gasoline engine. Injectors inject an anti-knock agent such as ethanol directly into a cylinder. It is preferred that the direct injection occur after the inlet valve is closed. It is also preferred that stoichiometric operation with a three way catalyst be used to minimize emissions. In addition, it is also preferred that the anti-knock agents have a heat of vaporization per unit of combustion energy that is at least three times that of gasoline.

公开(公告)号：US20200056557A1

公开(公告)日：2020-02-20

申请号：US16662429

申请日：2019-10-24

Applicant: Massachusetts Institute of Technology

Inventor： Leslie Bromberg ,  Daniel R. Cohn ,  John B. Heywood

IPC: F02D41/00 ,  F02B47/04 ,  F02B51/00 ,  F02D19/08 ,  F02D19/12 ,  F02D35/02 ,  F02M25/14 ,  F02M37/00 ,  F02D19/06 ,  F02B17/00 ,  F02D13/02 ,  F02D41/04 ,  F02D41/30

Abstract: Fuel management system for enhanced operation of a spark ignition gasoline engine. Injectors inject an anti-knock agent such as ethanol directly into a cylinder. It is preferred that the direct injection occur after the inlet valve is closed. It is also preferred that stoichiometric operation with a three way catalyst be used to minimize emissions. In addition, it is also preferred that the anti-knock agents have a heat of vaporization per unit of combustion energy that is at least three times that of gasoline.

公开(公告)号：US10344689B2

公开(公告)日：2019-07-09

申请号：US16170648

申请日：2018-10-25

Applicant: Massachusetts Institute of Technology

Inventor： Daniel R. Cohn ,  John B. Heywood ,  Leslie Bromberg

IPC: F02D41/30 ,  F02D41/00 ,  F02B47/04 ,  F02B51/00 ,  F02M25/14 ,  F02D19/08 ,  F02B17/00 ,  F02B7/00 ,  F02B47/00 ,  F02M25/00 ,  F02D35/02 ,  F02P5/04 ,  F02D41/38

Abstract: Fuel management system for efficient operation of a spark ignition gasoline engine. Injectors inject an anti-knock agent such as ethanol directly into a cylinder of the engine. A fuel management microprocessor system controls injection of the anti-knock agent so as to control knock and minimize that amount of the anti-knock agent that is used in a drive cycle. It is preferred that the anti-knock agent is ethanol. The use of ethanol can be further minimized by injection in a non-uniform manner within a cylinder. The ethanol injection suppresses knock so that higher compression ratio and/or engine downsizing from increased turbocharging or supercharging can be used to increase the efficiency or the engine.

公开(公告)号：US10221783B2

公开(公告)日：2019-03-05

申请号：US15919175

申请日：2018-03-12

Applicant: Massachusetts Institute of Technology

Inventor： Leslie Bromberg ,  Daniel R. Cohn ,  John B. Heywood

IPC: F02D41/00 ,  F02B47/04 ,  F02B51/00 ,  F02D19/08 ,  F02D19/12 ,  F02D35/02 ,  F02M25/14 ,  F02M37/00 ,  F02D19/06 ,  F02B17/00 ,  F02D13/02 ,  F02D41/04 ,  F02D41/30

Abstract: Fuel management system for enhanced operation of a spark ignition gasoline engine. Injectors inject an anti-knock agent such as ethanol directly into a cylinder. It is preferred that the direct injection occur after the inlet valve is closed. It is also preferred that stoichiometric operation with a three way catalyst be used to minimize emissions. In addition, it is also preferred that the anti-knock agents have a heat of vaporization per unit of combustion energy that is at least three times that of gasoline.

公开(公告)号：US09255519B2

公开(公告)日：2016-02-09

申请号：US14478069

申请日：2014-09-05

Applicant: Massachusetts Institute of Technology

Inventor： Daniel R. Cohn ,  John B. Heywood ,  Leslie Bromberg

IPC: F02M25/14 ,  F02B47/04 ,  F02B51/00 ,  F02D41/00 ,  F02D19/08 ,  F02B17/00 ,  F02B7/00 ,  F02B47/00 ,  F02M25/00

CPC classification number: F02D41/0025 ,  F02B7/00 ,  F02B17/00 ,  F02B17/005 ,  F02B47/00 ,  F02B47/04 ,  F02B51/00 ,  F02D19/08 ,  F02D19/081 ,  F02D35/027 ,  F02D41/3094 ,  F02D2041/389 ,  F02D2200/1002 ,  F02M25/00 ,  F02M25/14 ,  F02P5/045 ,  Y02T10/148

Abstract: Fuel management system for efficient operation of a spark ignition gasoline engine. Injectors inject an anti-knock agent such as ethanol directly into a cylinder of the engine. A fuel management microprocessor system controls injection of the anti-knock agent so as to control knock and minimize that amount of the anti-knock agent that is used in a drive cycle. It is preferred that the anti-knock agent is ethanol. The use of ethanol can be further minimized by injection in a non-uniform manner within a cylinder. The ethanol injection suppresses knock so that higher compression ratio and/or engine downsizing from increased turbocharging or supercharging can be used to increase the efficiency or the engine.

公开(公告)号：US20150369117A1

公开(公告)日：2015-12-24

申请号：US14807125

申请日：2015-07-23

Applicant: Massachusetts Institute of Technology

Inventor： Leslie Bromberg ,  Daniel R. Cohn ,  John B. Heywood

IPC: F02B17/00 ,  F02M25/14 ,  F02D19/08

CPC classification number: F02D41/0025 ,  F02B17/005 ,  F02B47/04 ,  F02B51/00 ,  F02D13/0215 ,  F02D19/0636 ,  F02D19/0655 ,  F02D19/0665 ,  F02D19/0671 ,  F02D19/0689 ,  F02D19/0692 ,  F02D19/08 ,  F02D19/081 ,  F02D19/084 ,  F02D19/12 ,  F02D35/027 ,  F02D41/0007 ,  F02D41/047 ,  F02D41/3094 ,  F02D2200/0406 ,  F02D2200/1002 ,  F02M25/14 ,  F02M37/0088 ,  Y02T10/148 ,  Y02T10/36

Abstract: Fuel management system for enhanced operation of a spark ignition gasoline engine. Injectors inject an anti-knock agent such as ethanol directly into a cylinder. It is preferred that the direct injection occur after the inlet valve is closed. It is also preferred that stoichiometric operation with a three way catalyst be used to minimize emissions. In addition, it is also preferred that the anti-knock agents have a heat of vaporization per unit of combustion energy that is at least three times that of gasoline.

Abstract translation: 燃油管理系统，用于增强火花点火汽油发动机的运行。 注射器将诸如乙醇之类的抗爆剂直接注入圆筒中。 优选在进气阀关闭之后进行直接喷射。 还优选使用三元催化剂的化学计量操作来最小化排放。 此外，还优选的是，所述防爆剂的每单位燃烧能的蒸发热至少是汽油的三倍。

公开(公告)号：US08857410B2

公开(公告)日：2014-10-14

申请号：US14249806

申请日：2014-04-10

Applicant: Massachusetts Institute of Technology

Inventor： Daniel R. Cohn ,  John B. Heywood ,  Leslie Bromberg

IPC: F02M25/14 ,  F02B47/00 ,  F02B7/00 ,  F02B51/00 ,  F02B47/04 ,  F02D19/08 ,  F02B17/00 ,  F02D41/00 ,  F02M25/00

CPC classification number: F02D41/0025 ,  F02B7/00 ,  F02B17/00 ,  F02B17/005 ,  F02B47/00 ,  F02B47/04 ,  F02B51/00 ,  F02D19/08 ,  F02D19/081 ,  F02D35/027 ,  F02D41/3094 ,  F02D2041/389 ,  F02D2200/1002 ,  F02M25/00 ,  F02M25/14 ,  F02P5/045 ,  Y02T10/148

Abstract: Fuel management system for efficient operation of a spark ignition gasoline engine. Injectors inject an anti-knock agent such as ethanol directly into a cylinder of the engine. A fuel management microprocessor system controls injection of the anti-knock agent so as to control knock and minimize that amount of the anti-knock agent that is used in a drive cycle. It is preferred that the anti-knock agent is ethanol. The use of ethanol can be further minimized by injection in a non-uniform manner within a cylinder. The ethanol injection suppresses knock so that higher compression ratio and/or engine downsizing from increased turbocharging or supercharging can be used to increase the efficiency or the engine.

Abstract translation: 燃油管理系统，用于火花点火汽油机的高效运行。 注射器将诸如乙醇的抗爆剂直接注入发动机气缸。 燃料管理微处理器系统控制防爆剂的注射，以便控制爆震并使在驱动循环中使用的抗爆剂的量最小化。 抗爆剂优选为乙醇。 可以通过在气缸内以非均匀的方式注入来进一步使乙醇的使用最小化。 乙醇注入抑制爆震，从而可以使用增加涡轮增压或增压的较高的压缩比和/或发动机的小型化来提高效率或发动机。

公开(公告)号：US20140216395A1

公开(公告)日：2014-08-07

申请号：US14249806

申请日：2014-04-10

Applicant: Massachusetts Institute of Technology

Inventor： Daniel R. Cohn ,  John B. Heywood ,  Leslie Bromberg

IPC: F02B17/00

CPC classification number: F02D41/0025 ,  F02B7/00 ,  F02B17/00 ,  F02B17/005 ,  F02B47/00 ,  F02B47/04 ,  F02B51/00 ,  F02D19/08 ,  F02D19/081 ,  F02D35/027 ,  F02D41/3094 ,  F02D2041/389 ,  F02D2200/1002 ,  F02M25/00 ,  F02M25/14 ,  F02P5/045 ,  Y02T10/148

Abstract: Fuel management system for efficient operation of a spark ignition gasoline engine. Injectors inject an anti-knock agent such as ethanol directly into a cylinder of the engine. A fuel management microprocessor system controls injection of the anti-knock agent so as to control knock and minimize that amount of the anti-knock agent that is used in a drive cycle. It is preferred that the anti-knock agent is ethanol. The use of ethanol can be further minimized by injection in a non-uniform manner within a cylinder. The ethanol injection suppresses knock so that higher compression ratio and/or engine downsizing from increased turbocharging or supercharging can be used to increase the efficiency or the engine.