Engine system and operating strategy for selective in situ and ex situ limiting of NOx production

• Main Author: ROBEL WADE
• Format: Patent
• Language: Chinese; English
• Published: 28.07.2020
• Subjects: BLASTING; COMBUSTION ENGINES; CONTROLLING COMBUSTION ENGINES; ENGINE PLANTS IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNALCOMBUSTION ENGINES; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES ORENGINES IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; LIGHTING; MACHINES OR ENGINES IN GENERAL; MECHANICAL ENGINEERING; STEAM ENGINES; WEAPONS

A compression ignition internal combustion engine system includes an engine and an exhaust system with an upstream exhaust conduit, a downstream exhaust conduit, and an exhaust placement mechanism formixing exhaust with fuel and air within engine cylinders. The upstream exhaust conduit has a raw exhaust inlet, a raw exhaust outlet, and a diesel exhaust fluid (DEF) inlet between the raw exhaust inlet and the raw exhaust outlet. The downstream exhaust conduit includes a bare particulate filter and a selective catalytic reduction (SCR) device. Related methodology including operating the engine in a startup mode, and in a running mode once the SCR device is warmed, is also disclosed. 一种压燃内燃式发动机系统包括发动机和排气系统，所述排气系统具有上游排气管道、下游排气管道，以及用于将排气与发动机气缸内的燃料和空气混合的排气放置机构。上游排气管道具有原始排气入口、原始排气出口，以及在原始排气入口与原始排气出口之间的柴油机排气处理液(DEF)入口。下游排气管道包括裸颗粒过滤器和选择性催化还原(SCR)装置。还公开了相关的方法，其包括在启动模式下操作发动机，以及一旦SCR装置升温就在运行模式下操作发动机。