CN212716834U

CN212716834U - Urea supply system, engine tail gas treatment system and tractor

Info

Publication number: CN212716834U
Application number: CN202021717597.9U
Authority: CN
Inventors: 许力强; 穆文彬; 田丹
Original assignee: Beijing Foton Cummins Engine Co Ltd
Current assignee: Beijing Foton Cummins Engine Co Ltd
Priority date: 2020-08-17
Filing date: 2020-08-17
Publication date: 2021-03-16
Anticipated expiration: 2030-08-17

Abstract

The utility model provides a urea feed system and engine exhaust gas treatment system, tractor, wherein urea feed system includes main urea case, at least one vice urea case and controller, main urea case is linked together through urea pump and SCR aftertreatment ware, every vice urea case all with main urea case intercommunication, the setting of vice urea case highly is higher than main urea case sets up the height, main urea case with be provided with the on-off valve between the vice urea case, the controller respectively with the urea pump with on-off valve electric connection is used for control the action of urea pump and the break-make of on-off valve. The utility model discloses an add vice urea case, increase urea reserve volume to improve whole car duration and conveying efficiency.

Description

Urea supply system, engine tail gas treatment system and tractor

Technical Field

The utility model relates to a vehicle manufacturing technical field, it is concrete, relate to urea feed system and engine exhaust processing system, tractor.

Background

At present, with the continuous upgrading of diesel engine vehicle type emission regulations, the emission limit of NOx is increasingly strict, a SCR carrier postprocessor needs to be matched on a diesel engine power system to meet the strict NOx emission requirement, a reactant is urea according to the requirement of an SCR system, so a urea box needs to be correspondingly equipped to store urea solution when the whole vehicle system is matched, and the urea consumption and the fuel consumption of products in the four countries are about 5-10% according to statistics (according to actual application road conditions), so a driver needs to supplement enough urea solution to the urea box irregularly to ensure the normal operation of the whole vehicle (the OBD fault can cause the torsion limitation of the whole vehicle and the failure of the whole vehicle due to the lack of urea).

According to the rapid economic development of the current country, the competition of various transportation industries is gradually increased, the requirement on the transportation efficiency is gradually improved, before the SCR system is introduced, the transportation efficiency and the mileage of the whole vehicle are only dependent on the volume of a fuel tank, the larger the fuel tank is, the larger the mileage can be, the shorter the time spent in one-way transportation is, and the transportation efficiency is further improved. However, under the current trend of emission regulations, the transportation efficiency and the endurance mileage of the whole vehicle also need to consider the volume of the urea tank.

According to practical application conditions, a tractor of part 6x4/6x2 is provided with a fuel tank module, a storage battery module, a gas storage barrel module, a urea tank module and an exhaust system module at the bottom of a frame, due to the limitation of the length of the frame, the space on two sides of the bottom of the frame is limited, the volume of the urea tank is limited, the proportion of the fuel tank and the urea tank is far less than 5%, and the cruising ability of the whole tractor is seriously influenced.

Problem to among the prior art, the utility model provides a through addding vice urea case, increase urea reserve volume to improve whole car duration and conveying efficiency's urea feed system and engine exhaust gas treatment system, tractor.

SUMMERY OF THE UTILITY MODEL

To the problem among the above-mentioned prior art, the utility model provides a urea feed system and engine exhaust gas treatment system, tractor through addding vice urea case, increases urea reserve volume to improve whole car duration and conveying efficiency.

In a first aspect, the utility model provides a urea feed system, including main urea case, at least one vice urea case and controller, main urea case is linked together through urea pump and SCR aftertreatment ware, every vice urea case all with main urea case intercommunication, the setting height of vice urea case is higher than the setting height of main urea case, main urea case with be provided with the on-off valve between the vice urea case, the controller respectively with the urea pump with on-off valve electric connection is used for control the action of urea pump and the break-make of on-off valve.

In one embodiment, the urea supply system further comprises a first liquid level meter disposed within the main urea tank, the first liquid level meter being electrically connected to the controller.

The beneficial effects of adopting the above embodiment are: the first liquid level meter is used for monitoring the height of the liquid level in the main urea box and transmitting a first monitoring signal to the controller.

In one embodiment, the urea supply system further comprises a second liquid level meter disposed within the secondary urea tank, the second liquid level meter being electrically connected to the controller.

The beneficial effects of adopting the above embodiment are: the second liquid level meter is used for monitoring the height of the liquid level in the auxiliary urea box and transmitting a second monitoring signal to the controller.

In a second aspect, the present invention provides an engine exhaust gas treatment system, comprising the above urea supply system.

In one embodiment, the engine exhaust treatment system further comprises an exhaust monitoring device disposed on an exhaust pipe of the engine and electrically connected to the controller.

The beneficial effects of adopting the above embodiment are: the tail gas monitoring device is used for monitoring the concentration of the tail gas in the exhaust pipe and transmitting a third monitoring signal to the controller.

The third aspect, the utility model provides a tractor, including above-mentioned engine exhaust treatment system.

In one embodiment, the tractor further comprises a frame and a cab disposed at a front end of the frame, the secondary urea tank being disposed on the frame rearward of the cab.

The beneficial effects of adopting the above embodiment are: the space behind the cab is fully utilized, and the space utilization rate is high.

In one embodiment, the tractor further comprises a compartment disposed on the frame, the cab and the compartment are spaced apart, and the auxiliary urea tank is located between the cab and the compartment.

The beneficial effects of adopting the above embodiment are: the original redundant space between the cab and the carriage is fully utilized, and the space utilization rate is high.

In one embodiment, the controller is an in-vehicle electronic ECU.

The beneficial effects of adopting the above embodiment are: facilitating control of the urea supply system.

In one embodiment, the main urea tank and the auxiliary urea tank are both made of high density polyethylene.

The beneficial effects of adopting the above embodiment are: and (4) corrosion resistance.

Compared with the prior art, the utility model has the advantages of:

(1) and the auxiliary urea box is additionally arranged, so that the urea reserve amount is increased, and the cruising ability and the transportation efficiency of the whole vehicle are improved.

(2) The liquid level heights in the main urea box and the auxiliary urea box are monitored in real time through the first liquid level meter and the second liquid level meter.

(3) And monitoring the content of the tail gas in the exhaust pipe in real time through a tail gas monitoring device.

The technical features mentioned above can be combined in various suitable ways or replaced by equivalent technical features as long as the purpose of the invention is achieved.

Drawings

The present invention will be described in more detail hereinafter based on embodiments and with reference to the accompanying drawings. Wherein:

FIG. 1 shows a schematic of a tractor construction;

in the drawings, like parts are provided with like reference numerals. The drawings are not to scale.

10-a tractor; 11-main urea tank; 13-auxiliary urea tank; 15-a controller; 17-a urea pump; 19-an SCR post-processor; 21-on-off valve; 23-a frame; 25-a cab; 27-a urea conduit; 29-wire.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

As shown in fig. 1, a urea supply system includes a main urea tank 11, at least one auxiliary urea tank 13 and a controller 15, the main urea tank 11 is communicated with an SCR post-processor 19 through a urea pump 17, each auxiliary urea tank 13 is communicated with the main urea tank 11, the auxiliary urea tank 13 is higher than the main urea tank 11, an on-off valve 21 is disposed between the main urea tank 11 and the auxiliary urea tank 13, and the controller 15 is electrically connected to the urea pump 17 and the on-off valve 21 respectively and is used for controlling the action of the urea pump 17 and the on-off of the on-off valve 21.

Specifically, in this embodiment, the urea pump 17 is used to pump the urea in the main urea tank 11 into the SCR aftertreatment device 19 to chemically react with the exhaust gas of the vehicle, so as to reduce the emission value. The setting height of the auxiliary urea box 13 is higher than that of the main urea box 11, so that urea in the auxiliary urea box 13 can automatically flow into the main urea box 11 under the action of gravity.

In one embodiment, the main urea tank 11, the on-off valve 21, the auxiliary urea tank 13, the urea pump 17 and the SCR aftertreatment unit 19 are respectively communicated through urea conduits 27, and the controller 15 is respectively electrically connected with the on-off valve 21 and the urea pump 17 through leads 29.

Wherein, urea feed system still includes first level gauge, and it sets up in main urea case 11, and first level gauge and controller 15 electric connection.

Specifically, in this embodiment, the height of liquid level in main urea case 11 can be monitored in real time to first level gauge and carry first monitoring signal to controller 15, and when the value of the liquid level height of main urea case 11 was less than the value of main urea case 11 predetermined minimum liquid level height in the first monitoring signal that controller 15 received, controller 15 control on-off valve 21 opened, and the urea in the vice urea case 13 flows into main urea case 11 automatically under the effect of gravity in order to supply the urea in main urea case 11. When the liquid level height value of the main urea tank 11 in the first monitoring signal received by the controller 15 is greater than the preset maximum liquid level height value of the main urea tank 11, the controller 15 controls the on-off valve 21 to close, and urea in the auxiliary urea tank 13 stops injecting into the main urea tank 11. Through the arrangement, urea can be automatically added under the condition of no stopping and no entering of a service station, and the cruising ability and the transportation efficiency of the whole vehicle are improved.

Wherein, urea feed system still includes the second level gauge, and it sets up in vice urea case 13, and the second level gauge is connected with controller 15 electrical property.

Specifically, in this embodiment, the height of liquid level in the vice urea case 13 of second level gauge can real-time supervision and carry second monitoring signal to controller 15, controller 15 and warning device electric connection, and when the value of the liquid level height of vice urea case 13 was less than the value of vice urea case 13 predetermined minimum liquid level height in the second monitoring signal that controller 15 received, controller 15 control warning device reported to the police to it is not enough to remind driver's vice urea case 13 interior urea.

The utility model also provides an engine exhaust gas treatment system, including above-mentioned urea supply system and tail gas monitoring devices, tail gas monitoring devices sets up on the blast pipe of engine to with 15 electric connection of controller.

Specifically, in this embodiment, tail gas monitoring devices sets up the inside at engine exhaust pipe, tail gas monitoring devices can the concentration of real-time supervision engine exhaust pipe internal exhaust and carry third monitoring signal to controller 15, intake pipe assembly and engine exhaust pipe intercommunication on the SCR aftertreatment ware, the controller 15 is according to the value control urea pump 17 pump income urea of tail gas concentration's among the third monitoring signal that tail gas monitoring devices carried speed, the concentration of tail gas is positive correlation with the speed that urea pump 17 pump income urea, so that urea and tail gas fully react, improve the utilization ratio of urea.

The utility model also provides a tractor 10, including above-mentioned engine exhaust gas treatment system, frame 23 and driver's cabin 25, driver's cabin 25 sets up in the one end of frame 23, and vice urea case 13 sets up on the frame 23 at driver's cabin 25 rear.

Specifically, in the present embodiment, the cab 25 is disposed at the front end of the vehicle frame 23, the main urea tank 11 is disposed at the bottom of the vehicle frame 23, and the sub-urea tank 13 is disposed on the vehicle frame 23 behind the cab 25, such that the installation height of the sub-urea tank 13 is higher than the installation height of the main urea tank 11.

The tractor 10 further includes a compartment disposed on the frame 23, the cab 25 is spaced apart from the compartment, and the auxiliary urea tank 13 is located between the cab 25 and the compartment.

Specifically, in this embodiment, a vehicle box is placed on the vehicle frame 23 behind the cab 25, a certain gap space exists between the vehicle box and the cab 25, and the auxiliary urea box 13 is disposed on the vehicle frame 23 in the gap space, so that the redundant space between the cab 25 and the vehicle box is fully utilized, and the space utilization rate is high.

In the present embodiment, the controller 15 of the tractor 10 is an in-vehicle electronic ECU.

In this embodiment, the main urea tank 11 and the auxiliary urea tank 13 are made of high-density polyethylene and are corrosion-resistant.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.

Claims

1. A urea supply system, comprising:

the main urea box is communicated with the SCR postprocessor through a urea pump;

each auxiliary urea box is communicated with the main urea box, the setting height of each auxiliary urea box is higher than that of the main urea box, and an on-off valve is arranged between the main urea box and the auxiliary urea box; and

and the controller is respectively electrically connected with the urea pump and the on-off valve and is used for controlling the action of the urea pump and the on-off of the on-off valve.

2. The urea supply system of claim 1, further comprising a first level gauge disposed within the main urea tank, the first level gauge being electrically connected to the controller.

3. The urea supply system of claim 1, further comprising a second level gauge disposed within the secondary urea tank, the second level gauge being electrically connected to the controller.

4. An engine exhaust gas treatment system, comprising a urea supply system according to any one of claims 1-3.

5. The engine exhaust treatment system of claim 4, further comprising an exhaust monitoring device disposed on an exhaust pipe of the engine and electrically connected to the controller.

6. Tractor, characterized in that it comprises an engine exhaust gas treatment system according to claim 4 or 5.

7. The tractor of claim 6, further comprising:

a frame; and

and the auxiliary urea box is arranged on the frame behind the cab.

8. The tractor of claim 7, further comprising a bed disposed on the frame, the cab and the bed being spaced apart, the secondary urea tank being located between the cab and the bed.

9. The tractor of claim 6, wherein the controller is an on-board electronic ECU.

10. The tractor of claim 6, wherein the main urea tank and the auxiliary urea tank are both made of high density polyethylene.