Retarder housing for a vehicle, retarder and method of operation thereof

Abstract

This invention discloses a retarder housing, a retarder, and its working method for vehicles, belonging to the field of commercial vehicle transmission technology. The retarder housing includes a housing forming a U-shaped oil sump and a rear cover. The housing is provided with an air inlet, an oil inlet / outlet for the working chamber, a cast-in-place oil passage, and a cast-in-place water inlet / outlet passage. Both the housing and the rear cover are provided with baffle ribs. The cast-in-place oil passage includes a working oil inlet section, a working oil inlet section, a working oil outlet section, and a non-working oil outlet section. The baffle ribs of the housing and the rear cover form a gas guiding channel, which communicates with the air inlet and extends to the bottom of the U-shaped oil sump. It also serves as the oil return circuit guiding channel for the oil to return to the oil sump when the retarder is disengaged. This invention optimizes the working efficiency and lubrication effect of the retarder, reduces idling losses, reduces the retarder oil injection failure rate, reduces the number of parts and assembly complexity, and improves the reliability and ease of maintenance of the retarder.

Description

Technical Field

[0001] This invention belongs to the technical field of commercial vehicle transmission systems, specifically relating to a retarder housing, a retarder, and its working method for vehicles. Background Technology

[0002] Retarder has become widely adopted in the industry, becoming a standard feature in the commercial vehicle sector. Hydraulic retarders, in particular, work by controlling air pressure to force oil stored in the retarder's oil sump into the working chamber through oil channels. This generates braking torque through the stator and rotor structure, thereby slowing down the vehicle.

[0003] Currently, existing retarders typically employ a composite structure for their oil sump and oil passages, consisting of a shell, rear cover, multiple intermediate pressure plates, and multiple baffles. These existing retarders have a relatively large number of components and a complex assembly structure, involving various connection and sealing mechanisms. During operation, potential failure modes such as loose connections and leaks may arise, affecting the stability of the retarder and even the entire system. Furthermore, the water inlet and outlet circuits of existing hydraulic retarders mainly consist of two integrated water pipes on the heat exchanger, welded together with it. This makes the heat exchanger prone to leaks of water or oil at the inlet and outlet pipe locations due to impacts or other reasons. Summary of the Invention

[0004] This invention provides a retarder housing, a retarder, and its working method for vehicles. The purpose is to solve the problems that current retarders have relatively many parts, relatively complex assembly structures, and multiple connection and sealing structures. During operation, there may be potential failure modes such as loose connections and leaks in the seals, as well as oil and water leaks at the inlet and outlet water pipes of the heat exchanger, which affect the reliability and stability of the retarder and even the entire vehicle.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: This invention provides a retarder housing for vehicles, comprising a housing and a rear cover, wherein the housing and the rear cover are assembled to form a U-shaped oil reservoir; wherein: The shell is provided with an air inlet, an oil inlet and outlet for the working chamber, an integrally cast oil passage, and an integrally cast water inlet and outlet passage; the interior of the shell is provided with integrally cast baffles, and the inner side of the rear cover is provided with integrally cast baffles that are intersecting and opposite to the integrally cast baffles of the shell. The casting integrated oil passage includes a working oil inlet section and a non-working oil outlet section. The working chamber oil inlet and outlet include a working chamber working oil outlet and a working chamber oil inlet. The working oil inlet section connects the U-shaped oil sump with the working chamber oil inlet. The non-working oil outlet section connects the non-working oil outlet with the working chamber non-working heat exchanger oil inlet. The integrated cast baffle ribs of the shell and the integrated cast baffle ribs of the rear cover work together to form a gas guiding channel, which is connected to the air inlet and extends to the bottom of the U-shaped oil sump.

[0006] In some embodiments, the shell further includes a U-shaped oil sump mating with the rear cover and an integrally cast oil sump portion. The U-shaped oil sump is formed by combining the U-shaped oil sump mating with the rear cover, the integrally cast oil sump portion, and the rear cover. The integrally cast baffles of the shell and the integrally cast baffles of the rear cover are spatially staggered after assembly. In some embodiments, a working oil inlet channel and a U-shaped oil sump baffle are provided between the working oil inlet channel and the U-shaped oil sump; the height of the working oil inlet channel and the U-shaped oil sump baffle is higher than the oil level in the U-shaped oil sump.

[0007] In some embodiments, the cast integral oil passage also includes a working oil outlet passage, the two ends of which are respectively connected to the working oil outlet of the working chamber and the oil inlet of the heat exchanger during operation.

[0008] Furthermore, the integrated casting oil passage also includes a second working oil inlet passage, the two ends of which are respectively connected to the first working oil inlet passage and the oil outlet of the heat exchanger during operation.

[0009] In some implementations, the oil outlet of the non-working oil passage is located at the outer diameter of the working chamber.

[0010] In some embodiments, the cast integral inlet and outlet channels include a coolant inlet channel and a coolant outlet channel formed on the housing.

[0011] In some embodiments, the housing is also provided with an oil outlet for the heat exchanger when not in operation, which is connected to the U-shaped oil sump through the oil inlet channel when not in operation.

[0012] The present invention also provides a retarder, which includes the above-described vehicle retarder housing.

[0013] The present invention also provides a method for operating a retarder, the method being based on the above-described retarder, the method comprising: In operation, the system is pneumatically driven. Gas enters from the air inlet of the housing and flows downward along the gas guide channel formed by the integrally cast baffle ribs of the housing and the integrally cast baffle ribs of the rear cover, squeezing the oil in the U-shaped oil sump. The oil enters the working chamber through the working oil inlet through a section of the working oil inlet to generate braking torque. Working state oil circulation: The oil in the working chamber flows out from the working oil outlet of the working chamber to the heat exchanger interface; after cooling, the oil returns to the working chamber inlet through the second section of the working oil inlet and the first section of the working oil inlet. Non-working oil circulation: Oil enters the working chamber from the U-shaped oil sump through the working inlet passage; oil is discharged from the outlet at the outer diameter of the working chamber through the non-working outlet passage and flows to the heat exchanger interface; after cooling, the oil returns to the U-shaped oil sump. Cooling circulation: The coolant in the vehicle's water system flows from the housing through the heat exchanger, absorbs heat from the oil, is discharged, and then flows back to the vehicle's water system through the housing.

[0014] Compared with the prior art, the present invention provides a retarder housing, a retarder, and a method for operating the same for vehicles, which has the following advantages: This invention discloses a retarder housing for vehicles. Through tooling of the housing and rear cover, the housing integrates a one-piece cast complete working and non-working circulation oil passage, a one-piece cast complete oil sump, and a one-piece cast inlet / outlet water passage. The rear cover is designed with staggered one-piece cast baffles corresponding to the housing, which can avoid all potential failure modes of traditional retarder assembly oil passages and baffles. Simultaneously, the one-piece cast baffles of the housing and rear cover can effectively prevent the potential risk of oil spraying out of the air passage when the retarder is deployed. The one-piece cast inlet / outlet water passage can prevent oil-water mixing and leakage at the retarder heat exchanger inlet / outlet water pipes. This invention effectively prevents oil from leaking out of the oil tank inlet and outlet, reduces idling losses, and improves response speed. It can increase the oil tank capacity of the retarder, allowing for one-time refueling. The integrated cast oil channel reduces the number of parts and corresponding failure points. The integrated cast oil tank baffle reduces the number of parts and corresponding failure points. Furthermore, the integrated cast inlet and outlet water channels prevent oil-water mixing and leakage at the inlet and outlet water pipes of the retarder heat exchanger, thus optimizing the retarder's working efficiency and lubrication effect, reducing idling losses, and improving the reliability and ease of maintenance of the retarder through integrated structural design, thereby reducing the number of parts and assembly complexity. Attached Figure Description

[0015] The accompanying drawings are provided to further understand the invention and constitute a part of this invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0016] Figure 1 This is a schematic diagram of the assembly structure of the housing and rear cover that make up the oil sump and oil passage in the retarder housing for a vehicle according to the present invention. Figure 2 This is a side cross-sectional schematic diagram of the U-shaped oil sump baffle rib in the retarder housing for a vehicle according to the present invention; Figure 3 This is a schematic diagram of the structure of the rear cover in a vehicle retarder housing according to the present invention; Figure 4 This is a schematic diagram of the first cross-sectional structure of the housing in a vehicle retarder housing according to the present invention; Figure 5 This is a schematic diagram of the second cross-sectional structure of the housing in a vehicle retarder housing according to the present invention; Figure 6 This is a schematic diagram of the third cross-sectional structure of the housing in a vehicle retarder housing according to the present invention; Figure 7 This is a partial structural diagram of a working oil inlet section one and a working oil inlet section two in a vehicle retarder housing according to the present invention. Figure 8 This is a schematic diagram of the structure of the heat exchanger for oil inlet and outlet during docking operation in a retarder housing for a vehicle according to the present invention.

[0017] Among them, 1. Shell, 11. Shell integrally cast baffle rib, 12. Shell U-shaped oil sump and rear cover mating part, 13. Shell integrally cast complete oil sump part, 14. Working oil outlet of working chamber, 15. Working oil outlet channel, 16. Working oil inlet channel section, 17. Working oil inlet channel and U-shaped oil sump baffle rib, 18. Working chamber oil inlet, 19. Non-working oil inlet channel; 110. Non-working oil outlet, 111. Non-working oil outlet, 112. Coolant outlet, 113. Coolant inlet, 114. Working oil inlet section 2, 115. Connecting to the working heat exchanger oil outlet, 116. Connecting to the working heat exchanger oil inlet, 117. Connecting to the non-working heat exchanger oil inlet, 118. Connecting to the non-working heat exchanger oil outlet; 2. Rear cover; 21. Rear cover integrally cast partition rib. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0020] Similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of the embodiments of the present invention, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0023] In the description of the embodiments of the present invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific circumstances.

[0024] like Figures 1-5 As shown, the present invention provides a retarder housing for a vehicle, comprising a housing 1 and a rear cover 2, wherein the housing 1 and the rear cover 2 are assembled to form a U-shaped oil reservoir; wherein: The housing 1 is provided with an air inlet, an oil inlet and outlet for the working chamber, an integrally cast oil passage, and an integrally cast water inlet and outlet passage; the interior of the housing 1 is provided with an integrally cast baffle 11, and the inner side of the rear cover 2 is provided with an integrally cast baffle 21 that is intersecting and opposite to the integrally cast baffle 11. The cast integrated oil passage includes a working oil inlet section 16 and a non-working oil outlet section 110. The working chamber oil inlet and outlet include a working chamber working oil outlet 14 and a working chamber oil inlet 18. The working oil inlet section 16 connects the U-shaped oil pool with the working chamber oil inlet 18. The non-working oil outlet section 110 connects the non-working oil outlet 111 and the non-working heat exchanger oil inlet 117. The integrally cast baffle 11 of the shell and the integrally cast baffle 21 of the rear cover work together to form a gas guiding channel, which is connected to the air inlet and extends to the bottom of the U-shaped oil sump.

[0025] The retarder housing for vehicles of this invention comprises a housing 1 and a rear cover 2 assembled to form a U-shaped oil sump, an air inlet, a cast-in-place oil passage, and a cast-in-place water inlet / outlet passage. The design of the cast-in-place oil passage and water inlet / outlet passage reduces the number of parts and lowers assembly complexity. The inner side of the rear cover 2 is provided with cast-in-place baffles 21 that intersect with the cast-in-place baffles 11 on the housing, forming a directional gas channel and constraining the airflow path. The oil passage has a working oil inlet section 16 connecting the oil sump and the oil inlet 18, and a working oil outlet section 15 connecting the oil outlet 14. The cast-in-place baffles 11 on the housing and the cast-in-place baffles 21 on the rear cover cooperate to form a gas guiding channel extending to the bottom of the oil sump. Combined with the U-shaped oil sump design, this increases the oil storage capacity, shortens the oil path, and improves structural stability.

[0026] Furthermore, the U-shaped oil tank of the present invention is formed by combining the shell U-shaped oil tank and the rear cover mating part 12, the shell integrally cast complete oil tank part 13 and the rear cover 2, which can expand the oil storage space. Combined with the spatially staggered shell integrally cast baffle 11 and the rear cover integrally cast baffle 21, the oil splash path can be reduced and the sealing performance can be improved.

[0027] The height of the working oil inlet channel and the U-shaped oil sump baffle 17 of this invention is higher than the oil level of the U-shaped oil sump, which can physically prevent excessive oil from flowing into the working chamber when not in operation, thus reducing energy consumption. The two ends of the working oil outlet channel 15 are respectively connected to the working oil outlet 14 and the heat exchanger oil inlet 116, ensuring efficient heat dissipation during operation. The two ends of the second section 114 of the working oil inlet channel are respectively connected to the first section 16 of the working oil inlet channel and the heat exchanger oil outlet 115 during operation; the segmented oil channel accelerates the circulation speed.

[0028] Furthermore, the oil outlet of the non-working oil outlet 110 of the present invention is located at the outer diameter of the working chamber, which can utilize the centrifugal force of the rotor rotation to throw out the oil, reducing pumping energy consumption. The coolant inlet channel 113 and coolant outlet channel 112 of the present invention are integrated into the housing 1, improving the reliability of the cooling water circuit connection.

[0029] The present invention also provides a retarder, which includes the vehicle retarder housing of the present invention.

[0030] The present invention also provides a method for operating a retarder, which is based on the retarder of the present invention, and the method includes: In operation, the system is pneumatically driven. Gas enters from the air inlet of the housing 1 and flows downward along the gas guide channel formed by the integrally cast baffle 11 of the housing and the integrally cast baffle 21 of the rear cover, squeezing the oil in the U-shaped oil sump. The oil enters the working chamber from the oil inlet 18 of the working chamber through the working oil inlet section 16 to generate braking torque. Working state oil circulation: The oil in the working chamber flows out from the working oil outlet 14 to the heat exchanger interface; after cooling, the oil returns to the working chamber inlet 18 through the second section of the working oil inlet channel 114 and the first section of the working oil inlet channel 16. Non-working oil circulation: Oil enters the working chamber from the U-shaped oil sump through the working oil inlet section 16; oil is discharged from the oil outlet at the outer diameter of the working chamber through the non-working oil outlet section 110 and flows to the heat exchanger interface; after heat dissipation, oil returns to the U-shaped oil sump through the non-working oil inlet section 19. Cooling circulation: The coolant in the vehicle's water circuit flows from housing 1 through the heat exchanger, absorbs heat from the oil, and is then discharged, before flowing back into the vehicle's water circuit through housing 1.

[0031] The following detailed description of a vehicle retarder housing, a retarder, and its working method, through specific embodiments, further illustrates the present invention.

[0032] This invention comprises a highly integrated shell 1 and a rear cover 2 with baffle ribs. The shell is integrally cast with a complete oil reservoir 13, and the oil channel side is also integrally cast with oil reservoirs on the left and right sides of the working chamber, forming a U-shaped oil reservoir structure. This U-shaped oil reservoir structure increases the amount of oil added to the retarder and shortens the oil inlet path during operation, thus improving the response time. Experiments have shown that this U-shaped oil reservoir / oil channel structure effectively improves the working response speed and reduces the response time by approximately 0.7 seconds.

[0033] When the integrally cast baffle 11 of the housing 1 of the present invention and the integrally cast baffle 2 with the rear cover 1 form a complete retarder U-shaped oil sump, the oil sump of the housing 1 is assembled. The oil sump of the rear cover 2, which mates with the housing 1, can store most of the retarder oil. The rear cover of this oil sump and the multiple baffle ribs inside the housing form an interlaced structure.

[0034] In this invention, the interlocking integrally cast baffle ribs 11 of the shell and the integrally cast baffle ribs 21 of the rear cover have the following two functions: First, when the retarder is disengaged, the pressure is released, and the oil returns to the oil sump without directly impacting upwards, thus preventing it from entering the retarder air passage through the air inlet and causing oil spraying from the retarder. Second, when the retarder is started, the compressed gas entering the oil sump shell is controlled to prevent it from directly impacting the upper surface of the oil, causing the oil to gradually rise into the air passage. This allows the gas to pass through the baffle ribs, change direction, and then evenly squeeze the oil downwards into the retarder working chamber.

[0035] The retarder housing of the present invention has an integrally cast retarder working circulation oil passage and an idle lubrication circulation oil passage when the retarder is not working, namely, large and small circulation oil passages.

[0036] The working oil inlet section 16 connects the oil sump on the side of the U-shaped oil sump and the retarder inlet, and is separated from the oil sump by the working oil inlet section and the U-shaped oil sump partition 17, forming an n-shaped structure. To reduce idling losses, the working oil inlet section and the U-shaped oil sump partition 17 are higher than the oil level of the U-shaped structure, preventing oil from entering the working chamber from the n-shaped structure oil passage when the retarder is not working, thus avoiding idling losses; at the same time, it avoids excessive oil entering when not working, which would increase idling losses. The height of the working oil inlet section and the U-shaped oil sump partition 17 is determined through theoretical calculations and experimental verification to ensure that, in the non-working state, the negative pressure generated by the rotor rotation allows a small amount of oil to pass from the U-shaped oil sump across the working oil inlet section and the U-shaped oil sump partition 17 and enter the retarder and working chamber for lubrication through the n-shaped structure oil passage.

[0037] The working oil outlet 15 of this invention connects the oil outlet 115 and the oil inlet 116 of the heat exchanger during docking operation; the second section 114 of the working oil inlet connects the first section 16 of the working oil inlet and the oil outlet 115 of the heat exchanger during docking operation; when starting to work, the oil enters the oil channel from the oil pool through the n-shaped structure oil channel, and then enters the working chamber through the oil inlet; after entering the working state, the oil flows out from the oil outlet, passes through the oil outlet channel, enters the heat exchanger through the oil inlet 116 during docking operation, flows out from the oil outlet 115 during docking operation, passes through the second section 114 of the working oil inlet and the first section 16 of the working oil inlet, and then enters the working chamber through the oil inlet 18 of the working chamber, and the cycle repeats, forming a working state oil circulation state.

[0038] The present invention has a non-working oil outlet 110 designed on the housing 1. The pressure is relatively small in the non-working state. Therefore, in order to effectively circulate the oil, the oil outlet of the non-working oil outlet 110 is designed on the outer diameter of the working chamber, and the centrifugal force throws the oil out.

[0039] When not in operation, the oil enters the retarder inlet from the oil sump on the n-type oil passage side through the working inlet section 16. The oil then passes through the non-working outlet section 10, enters the heat exchanger from the small circulation inlet, and flows out from the small circulation outlet, entering the bottom of the oil passage side of the retarder U-shaped structure oil sump. Then, the oil again enters the retarder inlet from the n-type oil passage side of the oil sump through the working inlet section 16, and the cycle repeats.

[0040] The housing 1 of this invention features a cast-integral inlet and outlet water passage. The vehicle's water system is directly connected to the housing 1. Coolant passes through the housing 1 to enter and exit the heat exchanger, cooling the oil and ensuring high reliability. This design also avoids the oil-water mixing leakage point at the inlet and outlet water pipes of existing retarder heat exchangers. Experimental testing has verified that the retarder oil passage of this invention can effectively reduce idling loss by 0.75 kW. Furthermore, the integrated cast oil passage structure reduces the need for multiple housings, intermediate steel plates, and other related components for assembling the oil passage; reducing corresponding assembly surfaces eliminates performance-related failures caused by oil leaks at mating surfaces, as well as various malfunctions caused by related components.

[0041] Example like Figures 1-8 As shown, the housing 1 and the rear cover 2 are assembled together to form the U-shaped oil tank of the present invention; Work methods during work: like Figure 2 As shown, 1) When the retarder is working, gas enters from the upper air inlet of housing 1, according to... Figure 2 As shown by the blue arrow, the oil flows downwards, squeezing out from the integrally cast oil sump 13 of the shell, passing over the working oil inlet and the U-shaped oil sump baffle 17, through a section 16 of the working oil inlet, and entering the retarder working chamber from the working chamber inlet 18, causing the retarder to generate braking torque. Kinetic energy is converted into oil heat energy.

[0042] 2) The working chamber oil flows out from the working outlet 14, passes through the working outlet channel 15, enters the heat exchanger through the heat exchanger inlet 116 during docking operation, cools down, flows out from the heat exchanger, passes through the heat exchanger outlet 115 during docking operation, passes through the second section of the working inlet channel 114, passes through the first section of the working inlet channel 16, and enters the retarder working chamber through the working chamber inlet 18. During stable operation, the cycle repeats 2), which is the so-called large circulation of retarder oil during operation.

[0043] 3) When the retarder is disengaged, gas pressure is released, and the oil returns to the U-shaped oil sump and the rear cover mating part 12, pushing the internal air upwards. The air discharge path is as follows: Figure 2 As shown by the upward red arrow, during depressurization, the oil will be blocked, buffered, and redirected by the integrally cast baffle 11 of the housing and the integrally cast baffle 21 of the rear cover, preventing the oil from being discharged from the air inlet.

[0044] Operating method when not in operation: When the retarder is not in operation, due to the rotation of the rotor, a negative pressure exists in the working chamber. This causes the oil to enter the working chamber from the integrally cast oil sump 13 on the n-type oil passage side through the working oil inlet section 16 and the working chamber oil inlet 18. The oil then passes through the non-working oil outlet 110 and non-working oil outlet 111, connects to the non-working heat exchanger inlet 117, and enters the heat exchanger from the small circulation inlet. After cooling, it flows out from the small circulation outlet, connects to the non-working heat exchanger outlet 118, and the non-working oil inlet 19. Finally, it enters the working chamber from the integrally cast oil sump 13 on the n-type oil passage side through the working oil inlet section 16 and the working chamber oil inlet 18. This cycle repeats, forming the small circulation of the retarder oil when not in operation.

[0045] The coolant enters through the coolant inlet channel 113, passes through the heat exchanger to cool the oil, and then exits through the coolant outlet channel 112 to carry away the heat generated by the retarder. The heat is then dissipated through the vehicle's cooling module.

[0046] In summary, this invention provides a vehicle retarder housing, a retarder, and its operating method. By integrally casting the housing and rear cover with an integrated oil sump, oil passages, and water passages, it reduces the number of parts and eliminates the risk of sealing failure and oil leakage associated with traditional assembled oil passages. The U-shaped oil sump, combined with a high-position baffle, shortens the oil inlet path, improving response speed. The centrifugal oil outlet combined with negative pressure lubrication in the non-working state effectively reduces idling loss by 0.75kW. Forced flow through an integrated heat exchanger in both the working large circulation and non-working small circulation, along with the integrally cast water passages, eliminates oil-water mixing leakage points, improving heat dissipation efficiency. This invention, through integrated casting, dual-circulation oil circuits, and airflow control, improves the reliability of the retarder, reduces energy efficiency, and enhances maintenance convenience.

[0047] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Anyone skilled in the art can readily implement the present invention according to the description and above. However, any modifications, alterations, and variations made by those skilled in the art without departing from the scope of the present invention using the disclosed technical content are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, and variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A retarder housing for a vehicle, characterized in that, Includes a housing (1) and a rear cover (2), which are assembled to form a U-shaped oil sump; wherein: The housing (1) is provided with an air inlet, an oil inlet / outlet of the working chamber, an integrally cast oil passage, and an integrally cast water inlet / outlet; the interior of the housing (1) is provided with an integrally cast baffle rib (11), and the inner side of the rear cover (2) is provided with an integrally cast baffle rib (21) of the rear cover that is intersected and opposite to the integrally cast baffle rib (11). The cast integrated oil passage includes a working oil inlet section (16) and a non-working oil outlet section (110). The working chamber oil inlet and outlet include a working chamber working oil outlet (14) and a working chamber oil inlet (18). The working oil inlet section (16) connects the U-shaped oil pool with the working chamber oil inlet (18). The non-working oil outlet section (110) connects the non-working oil outlet (111) and the non-working heat exchanger oil inlet (117). The integrally cast baffle rib (11) of the shell and the integrally cast baffle rib (21) of the rear cover work together to form a gas guiding channel, which is connected to the air inlet and extends to the bottom of the U-shaped oil tank. The shell (1) also includes a U-shaped oil pool and a rear cover fitting part (12) and an integrally cast oil pool part (13). The U-shaped oil pool is formed by the combination of the U-shaped oil pool and rear cover fitting part (12), the integrally cast oil pool part (13) and the rear cover (2). The integrally cast baffle rib (11) of the shell and the integrally cast baffle rib (21) of the rear cover are spatially staggered after assembly.

2. The retarder housing for vehicles according to claim 1, characterized in that, A working oil inlet section (16) and a U-shaped oil tank are provided with a working oil inlet and a U-shaped oil tank partition rib (17); the height of the working oil inlet and the U-shaped oil tank partition rib (17) is higher than the oil level of the U-shaped oil tank.

3. The retarder housing for vehicles according to claim 1, characterized in that, The cast integrated oil passage also includes a working oil outlet passage (15), the two ends of which are connected to the working oil outlet (14) of the working chamber and the oil inlet (116) of the heat exchanger during operation.

4. The retarder housing for vehicles according to claim 3, characterized in that, The cast integrated oil passage also includes a working oil inlet section 2 (114), the two ends of which are connected to the working oil inlet section 1 (16) and the oil outlet of the heat exchanger during operation (115), respectively.

5. The retarder housing for a vehicle according to claim 1, characterized in that, The oil outlet of the non-working oil outlet channel (110) is located at the outer diameter of the working chamber.

6. The retarder housing for a vehicle according to claim 1, characterized in that, The cast integral inlet and outlet channels include a coolant inlet channel (113) and a coolant outlet channel (112) formed on the shell (1).

7. The retarder housing for a vehicle according to claim 1, characterized in that, The housing (1) is also provided with an oil outlet (118) for the non-working heat exchanger oil inlet (117) corresponding to the non-working heat exchanger oil outlet (118), which is connected to the U-shaped oil sump through the non-working oil inlet channel (19).

8. A retarder, characterized in that, The retarder includes the retarder housing for a vehicle as described in claim 4.

9. A method for operating a retarder, characterized in that, The retarder operates based on the retarder described in claim 8, and the retarder operates by means of: In operation, the gas is driven by air pressure. Gas enters from the air inlet of the housing (1) and flows downward along the gas guide channel formed by the integral cast baffle rib (11) of the housing and the integral cast baffle rib (21) of the rear cover, squeezing the oil in the U-shaped oil pool. The oil enters the working chamber from the oil inlet (18) of the working chamber through the working oil inlet section (16) to generate braking torque. Working state oil circulation: The oil in the working chamber flows out from the working oil outlet (14) of the working chamber and flows to the heat exchanger interface; after cooling, the oil returns to the working chamber oil inlet (18) through the second section (114) of the working oil inlet and the first section (16) of the working oil inlet. Oil circulation in non-working state: Oil enters the working chamber from the U-shaped oil sump through the working inlet channel (16); oil is discharged from the outlet at the outer diameter of the working chamber through the non-working outlet channel (110) and flows to the heat exchanger interface; after heat dissipation, the oil returns to the U-shaped oil sump. Cooling cycle: The coolant in the vehicle's water circuit flows from the housing (1) through the heat exchanger, absorbs the heat of the oil, and is discharged. It then flows back to the vehicle's water circuit through the housing (1).

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