SCR (selective catalytic reduction) thermal management system based on 48 V weak mixing system and emission priority control method
A technology of priority control and heating system, applied in exhaust treatment, exhaust devices, mechanical equipment, etc., can solve the problems of poor engine economy, increased fuel injection, battery scrapped, etc., to reduce emissions, improve efficiency, The effect of reducing emission non-compliance
Active Publication Date: 2018-11-06
杭州休伦科技有限公司
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Problems solved by technology
Reducing the excessive air coefficient will increase the fuel injection volume and make the engine's economy worse
At the same time, in the case of no increase in power demand, increasing the fuel injection volume will also increase the burden on other after-processing components such as DPF, increasing CO 2 emissions, which is not conducive to the reduction of carbon emission indicators for vehicle companies
The electric heating method uses battery energy, which increases the fuel consumption of the vehicle and increases the burden on the battery, which may easily lead to early scrapping of the battery
Method used
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[0033] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0034] figure 1 It is a schematic diagram of the overall structure of the embodiment of the present invention. like figure 1 As shown, the SCR thermal management system based on the 48V weak hybrid system in this embodiment includes an HCU (vehicle controller) 10, a BMS (battery management system) 20 communicating with the HCU 10, and a DCU (post-processing system controller) 30 and an ECU (Engine Controller) 40, and an SCR catal...
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The invention belongs to the technical field of SCR (selective catalytic reduction) thermal treatment for a 48 V weak mixing system engine, and particularly relates to an SCR thermal management systembased on a 48 V weak mixing system and emission priority control method. The emission priority control method comprises the following steps of calculating electric power of a current battery; calculating required torque of a current vehicle; calculating battery electric power required by a driving system according to the required torque; calculating battery electric power required by a safety system; establishing an SCR thermal model; calculating battery electric power required by an SCR heating system according to the thermal model; supplying electric power to the safety system and the heating system by the battery in priority and distributing remaining electric power to the driving system when the electric power of the battery is higher than the sum of the battery electric power required by the safety system and the heating system. With the adoption of the SCR thermal management system and the emission priority control method, electric power of the battery can be sufficiently utilized and is reasonably distributed, so that the problem that tail gas emission of the engine does not reach the standard is solved, and the crystallization phenomenon is reduced.
Description
technical field [0001] The invention belongs to the technical field of SCR heat treatment of a 48V weak-mix system engine, and in particular relates to an SCR thermal management system and an emission priority control method based on a 48V weak-mix system. Background technique [0002] The national emission requirements for diesel engines are becoming more and more stringent. The pollutants emitted, especially nitrogen oxides, are one of the key indicators for reduction. The mainstream method for reducing nitrogen oxide emissions is to use post-treatment technology to reduce NO x It is treated to reduce to nitrogen, thereby reducing the content of nitrogen oxides. The most direct method is to use an SCR system containing 32.5% urea in water as a reducing agent, inject it into the exhaust gas of the diesel engine at a certain temperature and pressure, and form NH through catalysis 3 and CO 2 , again by NH 3 and NO x react to form N 2 discharge. [0003] Urea itself will...
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Patent Timeline
Login to View More IPC IPC(8): F01N3/20
CPCF01N3/2013F01N3/2066F01N2570/14F01N2610/02Y02A50/20Y02T10/12
Inventor 王宏宇郑金平房永潘海涛郑璜英
Owner 杭州休伦科技有限公司