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公开(公告)号：US09664093B2
公开(公告)日：2017-05-30
申请号：US14670936
申请日：2015-03-27
Applicant: Caterpillar Inc.
Inventor： Brandon Abel , David Pierpont , Adwait Joshi
CPC classification number: F01N11/005 , F01N9/005 , F01N2590/08 , F01N2900/0404 , F01N2900/1404 , F01N2900/1622 , Y02T10/47
Abstract: A method for calculating exhaust gas temperature indirectly at points in or around an engine exhaust after treatment system for use in determining an amount of unburned hydrocarbons resident therein at a given point in time.
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公开(公告)号：US20160084135A1
公开(公告)日：2016-03-24
申请号：US14492694
申请日：2014-09-22
Applicant: Caterpillar Inc.
Inventor： Aaron Harmon , Joshua Ratts , Wilce Williams , Adwait Joshi , Brandon Abel
CPC classification number: F01N9/005 , F01N3/103 , F01N3/2066 , F01N3/208 , F01N13/009 , F01N13/0097 , F01N13/011 , F01N13/017 , F01N2590/08 , F01N2610/02 , F01N2900/0412 , F01N2900/0416 , F01N2900/1402 , F01N2900/1602 , F01N2900/1616 , F01N2900/1618 , F01N2900/1621 , F02D41/0235 , F02D41/025 , F02D41/064 , F02D41/068 , F02D41/1459 , F02D2200/021 , F02D2200/0404 , F02D2200/0802 , Y02A50/2325 , Y02T10/24 , Y02T10/26 , Y02T10/47
Abstract: A system to protect an after treatment system from the effects of hydrocarbon accumulation on a catalyst. An engine system microprocessor using software estimates the amount of hydrocarbon accumulation on the after treatment system based on engine system parameters and other parameters. The accumulated hydrocarbons can cause an exothermic event if the catalyst temperature is allowed to ramp up too quickly. Similarly, accumulated hydrocarbon can temporarily reduce after treatment system performance. In the case of SCR, the microprocessor can control a reductant injector to modulate the amount of reductant being injected into the after treatment system to control the amount of ammonia slip. Alternatively or in addition to, the microprocessor can communicate with proper electronic control modules to modulate the engine system parameters such as engine speed, fuel, and back pressure to control engine exhaust flow temperature during operation of the engine system.
Abstract translation: 一种保护后处理系统免受烃积累对催化剂的影响的系统。 使用软件的发动机系统微处理器基于发动机系统参数和其他参数来估计后处理系统上的碳氢化合物积累量。 如果允许催化剂温度升高太快，累积的烃会引起放热事件。 类似地，积累的碳氢化合物可以在处理系统性能后暂时降低。 在SCR的情况下，微处理器可以控制还原剂注入器来调节注入到后处理系统中的还原剂的量以控制氨的滑移量。 或者或另外，微处理器可以与适当的电子控制模块进行通信，以调节发动机系统参数，例如发动机速度，燃料和背压，以在发动机系统运行期间控制发动机排气流量温度。
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公开(公告)号：US20160281574A1
公开(公告)日：2016-09-29
申请号：US14670936
申请日：2015-03-27
Applicant: Caterpillar Inc.
Inventor： Brandon Abel , David Pierpont , Adwait Joshi
CPC classification number: F01N11/005 , F01N9/005 , F01N2590/08 , F01N2900/0404 , F01N2900/1404 , F01N2900/1622 , Y02T10/47
Abstract: A method for calculating exhaust gas temperature indirectly at points in or around an engine exhaust after treatment system for use in determining an amount of unburned hydrocarbons resident therein at a given point in time.
Abstract translation: 一种用于在给定时间点确定其中存在的未燃碳氢化合物的量的处理系统之后的发动机排气中的周围或周围的间接计算废气温度的方法。
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公开(公告)号：US20160061134A1
公开(公告)日：2016-03-03
申请号：US14469618
申请日：2014-08-27
Applicant: Caterpillar Inc.
Inventor： Matthew P. Fletcher , Adwait V. Joshi , Matthew Mowers , Brandon Abel , Deepti Bhosekar , Karthik Jayasankaran
CPC classification number: F02D41/1446 , F01N3/18 , F02D41/0275 , F02D41/146 , F02D41/22
Abstract: An engine control system including an engine configured to generate exhaust comprising an exhaust constituent and to operate in a first operating mode or a second operating mode different from the first operating mode. The engine control system can include a plurality of sensors configured to generate temperature data corresponding to at least one of a measured exhaust temperature and an ambient temperature, and exhaust constituent data corresponding to an exhaust constituent concentration. The engine control system can include a controller operatively coupled to the plurality of sensors and the engine, and configured to receive the temperature data and the exhaust constituent data from the plurality of sensors, and change an operating state of the engine from the first operating mode to the second operating mode when the temperature data is less than a predetermined temperature threshold and the exhaust constituent data is greater than a predetermined exhaust constituent threshold.
Abstract translation: 一种发动机控制系统，其包括被配置为产生排气的发动机，所述排气包括排气成分并且在不同于所述第一操作模式的第一操作模式或第二操作模式下操作。 发动机控制系统可以包括多个传感器，其被配置为产生对应于测量的排气温度和环境温度中的至少一个的温度数据，以及对应于排气成分浓度的排气成分数据。 发动机控制系统可以包括可操作地耦合到多个传感器和发动机的控制器，并被配置为从多个传感器接收温度数据和排气构成数据，并且从第一操作模式改变发动机的运行状态 当温度数据小于预定温度阈值并且排气成分数据大于预定排气成分阈值时，到第二操作模式。
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