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1. 发明申请

WO2015052575A1 EXHAUST GAS CONTROL APPARATUS FOR AN INTERNAL COMBUSTION ENGINE AND CORRESPONDING CONTROL METHOD 审中-公开
标题翻译：用于内燃机的排气控制装置和相应的控制方法
公开(公告)号：WO2015052575A1
公开(公告)日：2015-04-16
申请号：PCT/IB2014/002124
申请日：2014-10-01
申请人： TOYOTA JIDOSHA KABUSHIKI KAISHA
发明人： NAKAI, Keigo , OTA, Hirohiko
IPC分类号： F01N3/20
CPC分类号： F01N3/208 , F01N2610/02 , F01N2900/1808 , F01N2900/1811 , F01N2900/1821 , Y02T10/24
摘要： An engine (1) is equipped with an SCR catalyst (41), a urea addition valve (230) that adds aqueous urea solution to an exhaust passage (28), a pressure sensor (260) that detects a pressure of aqueous urea solution in the urea addition valve (230), and a control device (80) that controls an amount of aqueous urea solution added by the urea addition valve (230). The control device (80) performs an addition amount correction process for correcting an amount of the aqueous urea solution added from the urea addition valve (230) such that the urea addition amount increases as the rate of decrease in the pressure of aqueous urea solution after the opening of the urea addition valve (230) decreases. The control device (80) reduces an increase correction amount for the amount of the urea added through the addition amount correction process as a temperature of a leading end of the urea addition valve (230) decreases.
摘要翻译：发动机（1）配备有SCR催化剂（41），将尿素水溶液添加到排气通路（28）的尿素添加阀（230），检测尿素水溶液的压力的压力传感器（260）尿素添加阀（230）和控制装置（80），其控制由尿素添加阀（230）加入的尿素水溶液的量。控制装置（80）进行用于校正从尿素添加阀（230）中添加的尿素水溶液的量的添加量校正处理，使得尿素添加量随着尿素水溶液的压力下降的速度增加，尿素加压阀（230）的开度减小。当尿素添加阀（230）的前端的温度降低时，控制装置（80）减少通过加法量校正处理所加入的尿素量的增加校正量。

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