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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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