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Power supply system of heavy-duty car SCR system

A technology of SCR system and power supply system, which is applied in the direction of electric control of exhaust treatment device, exhaust treatment, mechanical equipment, etc. It can solve the problems that the SCR system cannot work normally and affects the normal use of vehicles, and achieves simple structure and reliability High, the effect of small circuit changes

Inactive Publication Date: 2016-08-24
SINO TRUK JINAN POWER
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

In the actual use process, it is easy to happen that the SCR system cannot work normally, which affects the normal use of the vehicle

Method used

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  • Power supply system of heavy-duty car SCR system

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Embodiment Construction

[0015] In order to facilitate those skilled in the art to better understand the present invention, the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. The following is only exemplary and does not limit the protection scope of the present invention.

[0016] like figure 1 As shown, the power supply system of the heavy-duty vehicle SCR system of the present invention includes a DCU1, a urea pump 2, a urea nozzle 3, a storage battery 4, a main power switch 5, other electrical equipment 6, a relay 7 and a controller 8 for controlling the relay. The timer 8 is provided with a timer. After the DCU1, urea pump 2, and urea nozzle 3 are connected in parallel, their power supply pins are connected to the positive pole of the storage battery 4 through a relay 7, and the power supply pins of other electrical equipment 6 are connected through the main power switch. 5 is connected to the positive pole of th...

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Abstract

The invention discloses a power supply system of a heavy-duty car SCR system. The power supply system comprises a DCU, a urea pump, a urea nozzle, a storage battery, a battery main switch and other electric equipment and further comprises a relay and a controller controlling the relay. A timer is arranged inside the controller. The DCU, the urea pump and the urea nozzle are connected in parallel, and then the power supply pin ends of the DCU, the urea pump and the urea nozzle are connected to a positive electrode of the storage battery through the relay. The power supply pin end of the other electric equipment is connected to the positive electrode of the storage battery through the battery main switch. The relay and the battery main switch are connected in parallel. The DCU, the urea pump, the urea nozzle and the other electric equipment are connected in parallel, and then the ground pin ends of the DCU, the urea pump, the urea nozzle and the other electric equipment are jointly connected to a negative electrode of the storage battery. After the battery main switch is turned off, it can also be ensured that the DCU, the urea pump and the urea nozzle are delayed to be powered on for a certain period of time, and urea backflow is controlled to be completed. The power supply system is simple in structure, high in reliability and suitable for large-scale application and popularization in the field of heavy-duty cars, circuits of the finished car are changed slightly, and the heavy-duty car can be conveniently refitted and upgraded.

Description

technical field [0001] The invention relates to a power supply system of a heavy-duty vehicle SCR system, in particular to a power supply system with adjustable power-off delay time. Background technique [0002] At present, our country's regulations are more and more strict on the exhaust emission of heavy-duty vehicles, and the emission of automobile exhaust has become an important standard to measure the quality of automobiles. In order to meet the National IV and higher emission requirements, the current heavy-duty vehicles mostly use the selective catalytic redox system (SCR system) to treat the exhaust gas. The electronic control part of the SCR system includes DCU, urea pump and urea nozzle. The characteristics of the SCR system determine that when the vehicle is stopped and the engine is turned off, urea is required to return to ensure normal operation at the next startup. If the driver cuts off the main switch of the battery immediately after the engine is turned ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01N3/20F01N9/00
CPCF01N3/2073F01N3/208F01N2240/04Y02A50/20Y02T10/12Y02T10/40
Inventor 翟霄雁郭庆波肖景文黄少文刘浩
Owner SINO TRUK JINAN POWER
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