CN111075548A

CN111075548A - Exhaust system of engineering truck

Info

Publication number: CN111075548A
Application number: CN201911355236.6A
Authority: CN
Inventors: 朱新科
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-04-28

Abstract

The invention relates to the technical field of engineering machinery, in particular to an exhaust system of an engineering truck, which mainly comprises: the hydraulic system provides power for the working machine tool; an engine that can provide power and thereby produce exhaust; the oil cooling system is used for cooling the oil temperature of the hydraulic system and is provided with an oil cooler; an engine cooling system for cooling an engine coolant circulating through the engine, the engine cooling system being provided with a radiator; the radiator is arranged beside the oil cooler and is separated from the oil cooler by a certain space; an exhaust system operatively connected to the engine, the exhaust system operable to reduce pollutants in the exhaust. The invention provides an exhaust system of an engineering truck, which is used for cooling and filtering exhaust gas through a heat exchange device and effectively heating oil liquid by utilizing heat energy of exhaust temperature.

Description

Exhaust system of engineering truck

Technical Field

The invention relates to the technical field of engineering machinery, in particular to an exhaust system of an engineering truck.

Background

Many work machines, such as front loaders, include one or more implements that are capable of performing a work function. The front loader includes a prime mover that generates power to perform work, a shaft power conversion machine, and a reversible energy storage. For example, in the case of a four-wheel drive loader, the prime mover is typically a diesel engine that generates power by supplying diesel fuel. The diesel engine drives a transmission that moves ground engaging traction devices, such as wheels or treads, to push the loader in some cases over the unmodified ground for construction. Such loaders include a hydraulic machine having a hydraulic pump that may be used, for example, to raise or lower equipment such as a bucket.

Front loaders typically operate in off-road conditions, including construction vehicles, forestry vehicles, and lawn maintenance vehicles. The front loader can also be used as a road vehicle, for example for snow sweeping, salt spreading or with traction. Each work vehicle typically includes an internal combustion engine as the prime mover, which produces exhaust containing environmental pollutants that need to be removed or at least reduced in quantity before being released to the atmosphere. The exhaust gases released into the atmosphere are at high temperatures, and the high temperature exhaust gases can also damage surrounding vegetation, such as protruding tree branches. Furthermore, the exhaust gases are typically directed by an exhaust stack that extends vertically from the vehicle and is susceptible to damage. Accordingly, there is a need for an exhaust system that directs exhaust gases away from the vehicle at predetermined locations to reduce or prevent the harmful effects of high temperature exhaust gases.

Disclosure of Invention

The invention provides an exhaust system of an engineering truck, which is used for cooling and filtering exhaust gas through a heat exchange device and effectively heating oil liquid by utilizing heat energy of exhaust temperature.

In order to achieve the purpose, the invention provides the following technical scheme: an exhaust system of a machineshop car, comprising: the hydraulic system provides power for the working machine tool; an engine that can provide power and produce exhaust therefrom; an oil cooling system for cooling an oil temperature of the hydraulic system, the oil cooling system being provided with an oil cooler; an engine cooling system for cooling engine coolant circulating through an engine, the engine cooling system being provided with a radiator; a radiator disposed beside the oil cooler and spaced apart from the oil cooler by a certain space; an exhaust system operatively connected to the engine, the exhaust system operable to reduce pollutants in the exhaust gas, the exhaust system provided with an exhaust pipe for guiding the exhaust gas, the exhaust pipe being located between the oil cooler and the radiator and guiding the exhaust gas into the exhaust system; an air displacing device for sucking or discharging air from the oil cooler and the radiator, the air displacing device being for drawing exhaust gas through an exhaust pipe in the oil cooler or the radiator, the exhaust pipe leading the exhaust gas upstream of the air displacing device.

Preferably, the radiator is a vertical radiator.

Preferably, the oil cooler is a vertical oil cooler.

Preferably, the vertical oil cooler is located adjacent to the vertical radiator, and is spaced apart from the vertical radiator by a predetermined distance.

Preferably, the exhaust pipe is located in a space between the vertical oil cooler and the vertical radiator, and an outlet is provided in this space.

Preferably, the air displacing means is provided with a fan.

Preferably, a flow diverter is included, the flow diverter operatively connected to the exhaust pipe, the flow diverter for directing exhaust gases away from the air displacing device.

Preferably, the exhaust pipe is provided with an outlet and a hole spaced from the outlet in the vicinity of the oil cooler and the radiator, and the flow divider guides the exhaust gas to the hole.

Preferably, the diverter packet is provided with a valve and an air moving vane.

The invention has the beneficial effects that: the exhaust system is configured to reduce pollutants located in the exhaust. The exhaust pipe is located adjacent to one of the oil cooling system and the engine cooling system. The cooling system has an oil cooling system configured to cool oil of the hydraulic system and an engine cooling system configured to cool engine coolant circulating in the engine. The emissions control system includes an emissions control device configured to reduce pollutants from the exhaust of the engine. The emission control device includes at least one of a selective catalytic reduction device, a diesel oxidation catalyst device, a diesel particulate filter device, and a cooled exhaust gas recirculation device. An exhaust pipe is operatively connected to and extends from the emission control device and is configured to direct exhaust gas. Cooling oil used by a hydraulically operated tool with an oil cooler; cooling engine coolant circulating through the engine with a radiator; directing engine exhaust gas to the vicinity of one of an oil cooler and a radiator; and the engine exhaust is drawn from the oil cooler and radiator through the exhaust.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a side view of a work machine.

Fig. 2 shows the position of the exhaust pipe at the rear of the work machine.

FIG. 3 illustrates the location of the exhaust pipe and other components of the emission control system and cooling system.

FIG. 4 illustrates the location of the exhaust pipe, the emissions control system, and the cooling system.

Fig. 5 shows the air flowing through the aft cooling system.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The machine is shown as a front loader 100, such as a four wheel drive loader. However, the present disclosure is not limited to loaders, and may extend to other work machines, such as excavators, backhoe loaders, track harvesters, skidders, graders, or any other work machine. Thus, while the drawings and the ensuing description may refer to a loader, it will be understood that the scope of the present disclosure is beyond the loader, and the term "machine" or "work machine" will be used instead, where applicable. For purposes of this disclosure, the term "machine" or "work machine" is intended to be broader and encompass vehicles other than loaders.

The work vehicle 10 is a four-wheel drive (4WD) loader, and includes: a cab 12 and a rear body portion 14, the rear body portion 14 including an engine surrounded by a hood 12. The rear body portion 14 includes a rear wheel 16. The front body portion 18 includes front wheels 20 and supports a bucket 22. The linkage 24 is coupled to a frame 26 of the front body portion 18 to adjust the position of the front housing portion.

Hydraulic cylinders

28 and 30 move link 24 under the control of an operator in joystick 12. The articulation joint 32 is capable of angular change between the front body portion 18 and the rear body portion 14. One or more hydraulic cylinders 34 adjust the angular position between the front and

rear body portions

18, 14 under the influence of hydraulic pressure provided by the hydraulic pump. The hydraulic pump is part of a hydraulic system that provides power to move the linkage 24 and includes an oil cooler to reduce the temperature of the oil resulting from the work performed. In one or more embodiments, ground traction devices such as rails are used in place of wheels 16 and/or 20. The present application is not limited to four wheel drive loaders and other types of vehicles are contemplated, including excavators, scooters. Steering and other loaders include two wheel drives and tracks. The hydraulic pump is part of a hydraulic system that provides power to move the linkage 24 and includes an oil cooler to reduce the temperature of the oil resulting from the work performed. In one or more embodiments, ground traction devices such as rails are used in place of wheels 16 and/or 20. The present application is not limited to four wheel drive loaders and other types of vehicles are contemplated, including excavators, scooters. Steering and other loaders include two wheel drives and tracks. The hydraulic pump is part of a hydraulic system that provides power to move the linkage 24 and includes an oil cooler to reduce the temperature of the oil resulting from the work performed. In one or more embodiments, ground traction devices such as rails are used in place of wheels 16 and/or 20. The present application is not limited to four wheel drive loaders and other types of vehicles are contemplated, including excavators, scooters. Steering and other loaders include two wheel drives and tracks.

An accelerator pedal 36 and a user interface 38 are located within cab 12 for use by an operator of vehicle 10. An accelerator pedal 37 enables an operator to adjust the speed of the vehicle. In other embodiments, a handle provides this function.

The user interface 38 includes a plurality of operator selectable buttons configured to enable an operator to control the operation and functions of the vehicle 1, as well as any accessories or implements driven by the vehicle's powertrain, including the power take-off. In one embodiment, the user interface 38 includes a user interface screen having a plurality of user selectable buttons to select from a plurality of commands or menus, each of which may be selected via a touch screen having a display. In another embodiment, the user interface includes a plurality of mechanical buttons and a touch screen. In another embodiment, the user interface includes a display screen and only mechanical buttons.

The rear body section 14 includes an engine 40, also referred to as a prime mover, which in various embodiments is a gasoline or diesel powered engine. The engine 40 is connected to and drives a powertrain, which may include a manual transmission or an automatic transmission as is known to those skilled in the art. The present disclosure is not limited to manual and automatic transmissions, and other types of transmissions are contemplated, including hydrostatic and electric transmissions. The engine 40 provides torque to or absorbs torque from the powertrain, which in turn is used to drive the wheels 16 and/or 20.

The engine 40 is part of an engine system that in one or more embodiments includes an integrated emission control system that includes one or more emission control devices having, but not limited to: selective Catalytic Reduction (SCR) devices, Diesel Oxidation Catalysts (DOCs). As understood by those skilled in the art, the device, a Diesel Particulate Filter (DPF) device and a cooled Exhaust Gas Recirculation (EGR) device.

The integrated emissions control system includes a first canister 42 and a second canister 44, with the second canister 44 being fluidly connected to the first canister by a conduit 46 to provide an exhaust gas flow from the first canister 42 to the second canister 44. The first canister 42 is concealed by the housing 48. In one or more embodiments, the turbocharger 50 is coupled to a conduit 52 and receives fresh air from an air intake 54. An air filter 55 is coupled to the air inlet 54. Turbocharger 50 is coupled to first canister 42 by conduit 56. Fresh air enters the air filter inlet 54, reaches the filter 55, and proceeds to the turbocharger 50. In an embodiment, a turbocharger is not included, and is connected directly to the engine 40 from the air cleaner 55. In another embodiment, a turbocharger is not included, and a direct connection from the engine 40 to the first canister 42 is achieved. Although the depicted embodiment shows a first canister 42 and a separate second canister 44, in other embodiments, the first canister 42 and the second canister 44 are combined in a single, integrated exhaust system device.

The engine exhaust gas at high temperature is moved by the turbocharger 50 or directly from the engine 40, after which harmful compounds are reduced or eliminated from the exhaust gas, thereby being released into the atmosphere. In some cases, the temperature of the exhaust gas is between five hundred (500) degrees celsius and six hundred (600) degrees celsius. The second tank 44 ultimately reduces or eliminates the harmful compounds through the use of selective catalytic reduction, which in one or more embodiments includes the use of diesel exhaust gas (DEF). Once "cleaned," the exhaust gas is directed to the atmosphere through a conduit or pipe 60 operatively connected to the outlet of the second canister 44. However, the cleaned exhaust gas is still at a relatively high temperature.

In one or more embodiments, the radiator 62 and the oil cooler 64 are arranged such that a space 63, which includes one or more upright heat exchangers, is located between the radiator 62 and the oil cooler 64, and the radiator 62 cools engine coolant circulating in the engine. An oil cooler 64 is included as part of the hydraulic system. The conduit 60 includes a curved or angled portion 66 that directs exhaust gases from a portion 68 extending from the second canister 44 to a relatively vertical portion 70 of the conduit 60. The vertical portion 70 includes an outlet 72 where the cleaned exhaust gas is discharged.

An outlet 72 extends into the space 63 for directing cleaned exhaust air from the outlet 72 to an air displacing means such as a fan 76. The fan 76 is rotated in a predetermined direction to guide the exhaust air from the outlet 72 to the space 63 through the space 63. In the illustrated embodiment, the exhaust gas is introduced downstream of the heat exchanger and upstream of the fan 76. In other embodiments, the exhaust is introduced downstream of the fan 76.

By directing the exhaust gases to the space 63, the cooling system is used to extract engine exhaust gases from the vehicle 10 without the use of a conventional exhaust stack. In one known system, the exhaust stack comprises a tubular exhaust stack having a venturi nozzle to draw fresh air from the engine compartment into the exhaust gas stream, thereby cooling the air in the process. Known exhaust stacks extend away from the vehicle in a vertical direction.

In the present disclosure, engine exhaust exits the engine 40 and enters the aftertreatment system (or muffler, if used) using conventional ductwork strategies. The exhaust gas then exits the aftertreatment system (or muffler) and enters an exhaust pipe 60 where it is routed to the rear of the machine where the cooling assembly is located, in the exhaust pipe 60. Accordingly, engine exhaust is introduced into the cooling system airflow upstream of cooling fan 76. Introducing engine exhaust into the cooling air flow lowers the exhaust temperature and exhausts the exhaust from the machine through an outlet of the cooling system. In another embodiment, air is introduced downstream of the fan. Introducing exhaust downstream of the fan maintains the efficiency of the cooling air flow fan and improves the durability of the fan. Lower temperature air is denser than higher temperature air and has a higher mass flow rate. This results in higher air flows for more heat exchange. The durability of the fan is improved because the fan assembly experiences a more consistent airflow temperature, thereby reducing thermal cycling of the fan assembly and thus reducing higher thermal strains.

The tube 60 is located below the housing 15 and in particular below a cover 80 which is part of the rear body portion 14. The shroud 80 includes a plurality of vents 82 that enable the air inlet 54 to receive fresh air for the turbocharger 50. The conduit 60 follows a path from the second tank 44 to the space 63 that avoids blockage of the air inlet 54.

The direction of the airflow is indicated by a set of arrows indicating the flow of air into the rear body portion 14. For illustrative purposes, the housing is removed. The first air inlet 81 is located at a first vertical side of the rear body portion 14 and the second air inlet 82 is located at a second vertical side of the rear body portion 14. The third air inlet 84 is located on the horizontal side of the top. The rear fuselage section requires additional cooling of the exhaust air entering the space 63 before it is drawn into the fan 76 and exhausted to the atmosphere, since the air flow into the cooling system begins from outside the vehicle 10. The fan 76 draws air through each of the radiator 62 and the cooler 64. This configuration provides advantages over known exhaust stacks in which cooling of the exhaust gases does not occur or is minimal. In addition, routing of exhaust duct 60 improves the field of view of the vehicle operator and enhances the product design of hood 80. In addition, current exhaust configurations use a venturi to cool the exhaust prior to entering the atmosphere. The amount of cooling in the venturi system is significantly less than that provided by the described embodiments.

As described above, the exhaust duct 60 includes an extension portion 68 connected to a relatively vertical portion 70. In one embodiment, the portion 68 is fixed in position relative to the vertical portion by bending the continuous tube at the angled portion 66. In another embodiment, a connector fixedly couples portion 68 to vertical portion 70.

Vertical portion 70 is connected to portion 68 by a connector 86, which in one embodiment includes a diverter 88 located within connector 86. Diverter 88 is positioned adjacent aperture 90. In one position of diverter 88, aperture 90 is closed and exhaust air flows from second canister 44 to outlet 72 for extraction by the fan. In the second position of the diverter 88, the aperture 90 is open and the diverter that previously blocked the aperture 90 is positioned to block the flow of exhaust gas into the vertical portion 70.

The flow diverter 88 is provided in a cooling system in which the fan 76 is reversible. In some embodiments, a reversible fan system is provided to improve engine performance, for example, by removing debris from the radiator. Reversible fans may also be used to reduce or prevent engine overcooling. The position of diverter 88 should prevent exhaust air from entering space 63 if the reversible fan is instructed to blow air into the oil cooler or radiator.

In other embodiments, the flow diverter 88 includes other means to redirect the flow of exhaust gas from the conduit 60 before the exhaust gas reaches the outlet 72, such as through the aperture 90. In one embodiment, the flow diverter includes a valve located in the exhaust system, for example, in the second canister 44. In another embodiment, the flow diverter 88 includes a valve located at the connector 86. In other embodiments, the flow splitter includes an airflow-operated vane or an air wedge actuated by the cooling system airflow. In one or more embodiments, the position of the diverter is adjusted by an electronic or hydraulic control system that actuates the diverter to a predetermined position based on the direction of rotation of the blades of the fan 76. The connector 86 is rotatable such that the vertical portion 70 is configured to move from the vertical position shown to another position, such as horizontal, to redirect the exhaust flow. The position of the vertical portion 90 is adjusted manually by an operator or by an actuator (e.g., a motor, hydraulic cylinder, or other drive mechanism).

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a machineshop car exhaust system which characterized in that: the method comprises the following steps:

the hydraulic system provides power for the working machine tool;

an engine that can provide power and produce exhaust therefrom;

an oil cooling system for cooling an oil temperature of the hydraulic system, the oil cooling system being provided with an oil cooler;

an engine cooling system for cooling engine coolant circulating through an engine, the engine cooling system being provided with a radiator;

a radiator disposed beside the oil cooler and spaced apart from the oil cooler by a certain space;

an exhaust system operatively connected to the engine, the exhaust system operable to reduce pollutants in the exhaust gas, the exhaust system provided with an exhaust pipe for guiding the exhaust gas, the exhaust pipe being located between the oil cooler and the radiator and guiding the exhaust gas into the exhaust system;

an air displacing device for sucking or discharging air from the oil cooler and the radiator, the air displacing device being for drawing exhaust gas through an exhaust pipe in the oil cooler or the radiator, the exhaust pipe leading the exhaust gas upstream of the air displacing device.

2. The machineshop car exhaust system of claim 1, wherein: the radiator is a vertical radiator.

3. The machineshop car exhaust system of claim 2, wherein: the oil cooler is a vertical oil cooler.

4. The machineshop car exhaust system of claim 3, wherein: the vertical oil cooler is positioned at the adjacent position of the vertical radiator and mutually separated by a certain space.

5. The machineshop car exhaust system of claim 4, wherein: the exhaust pipe is located in a space between the vertical oil cooler and the vertical radiator, and an outlet is provided in the space.

6. The machineshop car exhaust system of claim 5, wherein: the air displacing device is provided with a fan.

7. The machineshop car exhaust system of claim 1, wherein: also included is a flow diverter operatively connected to the exhaust pipe for directing exhaust gases away from the air displacement device.

8. The machineshop car exhaust system of claim 7, wherein: the exhaust pipe is provided with an outlet and a hole spaced from the outlet near the oil cooler and the radiator, and the flow divider guides exhaust gas to the hole.

9. The machineshop car exhaust system of claim 8, wherein: the flow divider bag is provided with a valve and an air moving blade.