Urea pump, anti-blocking control method thereof, SCR device and urea injection system
A technology of urea injection system and urea pump, which is applied to the electronic control of noise reduction devices, exhaust devices, and exhaust treatment devices. loss effect
Active Publication Date: 2021-04-09
WEICHAI POWER CO LTD +1
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Problems solved by technology
[0002] At present, when the urea injection system is in normal operation, if there is blockage caused by impurities at the filter element of the urea pump and the injection system cannot work normally, the control unit will give multiple instructions to restart the urea injection system. After several instructions, the urea injection system still cannot work normally, and the control unit will send out a urea pump failure signal and limit the torque of the vehicle. To unnecessary loss, and will affect the user's use
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Embodiment Construction
[0030] One of the cores of the present invention is to provide a urea pump, so as to prevent the urea pump from being mistaken as a faulty part due to blockage of the filter element, improve the reliability of the urea pump, and improve user experience.
[0031] Another core of the present invention is to provide a urea pump anti-clogging control method comprising the above urea pump, a urea injection system and an SCR device.
[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0033] see figure 1 , figure ...
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The invention relates to a urea pump, an anti-blocking control method thereof, an SCR device and a urea injection system. The urea pump comprises a first filter device, a first differential pressure detection device and bypass pipelines; the first filter device is arranged on the urea pump pipeline, and the first differential pressure detection device is used for detecting the differential pressure of the two ends of the first filter device; the bypass pipelines are connected with the first filter device in parallel, and a control valve is arranged on the bypass pipelines; the first differential pressure detection device and the control valve are correspondingly connected with a controller of the urea pump, and the controller of the urea pump controls the control valve to be opened when the first differential pressure detection device detects that the differential pressure between the two ends of the first filter device is greater than a preset value; the bypass pipelines are connected to the two ends of the first filter device of the urea pump in parallel, when the first filter device is blocked, system pressure buildup can be conducted through the bypass pipelines, the situation that the urea pump is mistakenly regarded as a fault part due to blocking of the first filter device is avoided, unnecessary losses of a user are reduced, the reliability of the urea pump is improved, and the user experience is improved.
Description
technical field [0001] The invention relates to the technical field of diesel engine air management systems, in particular to a urea pump, an anti-clogging control method thereof, an SCR device, and a urea injection system. Background technique [0002] At present, when the urea injection system is in normal operation, if the filter element of the urea pump is blocked by impurities and the injection system cannot work normally, the control unit will give multiple instructions to restart the urea injection system. After several instructions, the urea injection system still cannot work normally, and the control unit will send out a urea pump failure signal and limit the torque of the vehicle. To unnecessary losses, and will affect the use of users. Contents of the invention [0003] The first object of the present invention is to provide a urea pump to avoid the situation that the urea pump is mistaken as a faulty part due to clogging of the filter element, improve the reli...
Claims
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IPC IPC(8): F01N3/20F01N11/00
CPCF01N3/2066F01N3/208F01N11/00F01N2610/02F01N2610/1426F01N2610/144Y02T10/12Y02T10/40
Inventor 李晓光安丽花张言库
Owner WEICHAI POWER CO LTD