公开(公告)号：US09850812B2

公开(公告)日：2017-12-26

申请号：US14506766

申请日：2014-10-06

Applicant: Wisconsin Alumni Research Foundation

Inventor： Rolf Deneys Reitz ,  Reed M. Hanson ,  Derek A. Splitter ,  Sage Kokjohn

IPC: F02D41/00 ,  F02B69/02 ,  F02B1/14 ,  F02M43/00 ,  F02D41/08 ,  F02D41/30 ,  F02D19/08 ,  F02D13/02 ,  F02B17/00 ,  F02M69/04 ,  F02D11/10

CPC classification number: F02B69/02 ,  F02B1/14 ,  F02B17/005 ,  F02D11/105 ,  F02D13/0234 ,  F02D19/081 ,  F02D41/0002 ,  F02D41/0025 ,  F02D41/006 ,  F02D41/08 ,  F02D41/3017 ,  F02D2041/001 ,  F02D2041/0022 ,  F02D2041/3052 ,  F02M43/00 ,  F02M69/044 ,  F02M69/046 ,  Y02T10/18 ,  Y02T10/36 ,  Y02T10/42 ,  Y02T10/47

Abstract: A compression ignition (diesel) engine uses two or more fuel charges during a combustion cycle, with the fuel charges having two or more reactivities (e.g., different cetane numbers), in order to control the timing and duration of combustion. By appropriately choosing the reactivities of the charges, their relative amounts, and their timing, combustion can be tailored to achieve optimal power output (and thus fuel efficiency), at controlled temperatures (and thus controlled NOx), and with controlled equivalence ratios (and thus controlled soot). At low load and no load (idling) conditions, the aforementioned results are attained by restricting airflow to the combustion chamber during the intake stroke (as by throttling the incoming air at or prior to the combustion chamber's intake port) so that the cylinder air pressure is below ambient pressure at the start of the compression stroke.

公开(公告)号：US10794340B2

公开(公告)日：2020-10-06

申请号：US15960735

申请日：2018-04-24

Applicant: Wisconsin Alumni Research Foundation

Inventor： Sage Kokjohn ,  David Wickman ,  Flavio Dal Forno Chuahy

IPC: F02M31/08 ,  F02B17/00 ,  F02B45/00 ,  F02D19/06 ,  F02D41/00 ,  F02B51/00

Abstract: A first engine fuel, for example diesel fuel, is reformed (preferably via steam reforming) to produce syngas for use as a second engine fuel, with the fuels then both being used in an internal combustion engine to perform Reactivity Controlled Compression Ignition (RCCI). The syngas is produced and supplied to the engine as a supercritical fluid, thereby avoiding the pumping losses that would occur if syngas was pressurized for supply/injection. The reforming is done by a reformer which is provided as a unit with the engine (e.g., both the engine and reformer are onboard a vehicle), thereby effectively allowing use of a single fuel for RCCI engine operation.

公开(公告)号：US12209532B2

公开(公告)日：2025-01-28

申请号：US18176787

申请日：2023-03-01

Applicant: Wisconsin Alumni Research Foundation

Inventor： Harsh Darshan Sapra ,  Sage Kokjohn ,  Randy Hessel ,  Eri Amezcua Cuellar ,  David Rothamer

IPC: F02B9/04 ,  F02B43/12 ,  F02B69/04 ,  F23Q7/00

Abstract: A compression ignition engine provides a main injector and a second pilot injector producing a spray passing over an igniter producing a pilot flame assisting in ignition of the main injector spray.

公开(公告)号：US20190323459A1

公开(公告)日：2019-10-24

申请号：US15960735

申请日：2018-04-24

Applicant: Wisconsin Alumni Research Foundation

Inventor： Sage Kokjohn ,  David Wickman ,  Flavio Dal Forno Chuahy

IPC: F02M31/08 ,  F02B17/00 ,  F02B45/00 ,  F02B51/00 ,  F02D19/06 ,  F02D41/00

Abstract: A first engine fuel, for example diesel fuel, is reformed (preferably via steam reforming) to produce syngas for use as a second engine fuel, with the fuels then both being used in an internal combustion engine to perform Reactivity Controlled Compression Ignition (RCCI). The syngas is produced and supplied to the engine as a supercritical fluid, thereby avoiding the pumping losses that would occur if syngas was pressurized for supply/injection. The reforming is done by a reformer which is provided as a unit with the engine (e.g., both the engine and reformer are onboard a vehicle), thereby effectively allowing use of a single fuel for RCCI engine operation.

公开(公告)号：US20150034045A1

公开(公告)日：2015-02-05

申请号：US14506766

申请日：2014-10-06

Applicant: Wisconsin Alumni Research Foundation

Inventor： Rolf Deneys Reitz ,  Reed M. Hanson ,  Derek A. Splitter ,  Sage Kokjohn

IPC: F02B69/02 ,  F02B17/00 ,  F02B1/14

CPC classification number: F02B69/02 ,  F02B1/14 ,  F02B17/005 ,  F02D11/105 ,  F02D13/0234 ,  F02D19/081 ,  F02D41/0002 ,  F02D41/0025 ,  F02D41/006 ,  F02D41/08 ,  F02D41/3017 ,  F02D2041/001 ,  F02D2041/0022 ,  F02D2041/3052 ,  F02M43/00 ,  F02M69/044 ,  F02M69/046 ,  Y02T10/18 ,  Y02T10/36 ,  Y02T10/42 ,  Y02T10/47

Abstract: A compression ignition (diesel) engine uses two or more fuel charges during a combustion cycle, with the fuel charges having two or more reactivities (e.g., different cetane numbers), in order to control the timing and duration of combustion. By appropriately choosing the reactivities of the charges, their relative amounts, and their timing, combustion can be tailored to achieve optimal power output (and thus fuel efficiency), at controlled temperatures (and thus controlled NOx), and with controlled equivalence ratios (and thus controlled soot). At low load and no load (idling) conditions, the aforementioned results are attained by restricting airflow to the combustion chamber during the intake stroke (as by throttling the incoming air at or prior to the combustion chamber's intake port) so that the cylinder air pressure is below ambient pressure at the start of the compression stroke.

Abstract translation: 压缩点火（柴油）发动机在燃烧循环期间使用两个或更多个燃料充电，其中燃料电荷具有两个或更多个反应性（例如，不同的十六烷值），以便控制燃烧的时间和持续时间。 通过适当地选择电荷的反应性，它们的相对量和它们的时间，可以调节燃烧以在受控的温度（和因此控制的NOx）下实现最佳的功率输出（并且因此燃料效率），并且具有受控的当量比（和 从而控制煤烟）。 在低负载和空载（空转）条件下，通过在进气冲程期间限制气流到燃烧室（通过在燃烧室的进气口处或在燃烧室的进气口之前节流进入的空气）来实现上述结果，使得气缸空气压力 在压缩冲程开始时低于环境压力。