Retarder shell for vehicle, retarder and working method of retarder

Abstract

The invention discloses a retarder shell for a vehicle, a retarder and a working method of the retarder shell, and belongs to the technical field of commercial vehicle transmission. The retarder shell comprises a shell and a rear cover which form a U-shaped oil pool; the shell is provided with an air inlet, a working cavity oil inlet and outlet, a cast integrated oil channel and a cast integrated water inlet and outlet channel. Both the shell and the rear cover are provided with blocking ribs; the cast integrated oil duct comprises a first working oil inlet duct section, a second working oil inlet duct section, a working oil outlet duct and a non-working oil outlet duct; the blocking ribs of the shell and the rear cover form a gas guiding channel, the gas guiding channel is communicated with the gas inlet and extends to the bottom of the liquid level of the U-shaped oil pool, and meanwhile the gas guiding channel is an oil liquid loop guiding channel for oil liquid to return to the oil pool when the retarder quits working. The working efficiency and the lubricating effect of the retarder are optimized, the idling loss is reduced, the oil injection failure rate of the retarder is reduced, the number of parts and the assembly complexity are reduced, and the reliability and the maintenance convenience of the retarder are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of commercial vehicle transmission systems, and in particular relates to a retarder housing, a retarder and a working method thereof for a vehicle. Background Art

[0002] Retarder systems have become widely used within the industry, becoming standard equipment in the commercial vehicle industry. This is particularly true for hydraulic retarders, which operate by controlling air pressure to squeeze the oil stored in the retarder's oil reservoir into the working chamber through the oil channel. This creates braking torque through the stator and rotor structures, thereby decelerating the vehicle.

[0003] Currently, the oil reservoir and oil channels of existing retarders generally utilize a composite structure consisting of a housing, a rear cover, multiple intermediate pressure plates, and multiple baffles. These retarders have a relatively large number of components, a complex assembly structure, and multiple connections and seals. This can lead to potential failure modes such as loose connections and seal leakage, impacting the retarder and even the overall stability. The inlet and outlet water lines of existing hydraulic retarders primarily consist of two inlet and outlet pipes built into the heat exchanger, which are welded to the heat exchanger. This makes the heat exchanger susceptible to leaks and other problems, such as water and oil leakage, due to collisions with the pipes. Summary of the Invention

[0004] The present invention provides a retarder housing, a retarder and an operating method thereof for a vehicle, aiming to solve the problem that the current retarder has relatively many parts, a relatively complex assembly structure, and multiple connection and sealing structures. Potential failure modes such as loose connections and seal leakage may occur during operation, and oil and water leakage at the inlet and outlet pipes of the heat exchanger may affect the reliability and stability of the retarder and even the entire vehicle.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: The present invention provides a retarder housing for a vehicle, comprising a housing and a rear cover, wherein the housing and the rear cover are assembled to form a U-shaped oil pool; wherein: The shell is provided with an air inlet, a working chamber oil inlet and outlet, a cast integral oil channel, and a cast integral water inlet and outlet channel; the interior of the shell is provided with a shell integral cast baffle rib, and the inner side of the rear cover is provided with a rear cover integral cast baffle rib staggered and opposite to the shell integral cast baffle rib; The cast integrated oil passage includes a working oil inlet passage section and a non-working oil outlet passage. The working chamber oil inlet and outlet include a working chamber working oil outlet and a working chamber oil inlet. The working oil inlet passage section connects the U-shaped oil pool with the working chamber oil inlet, and the non-working oil outlet passage connects the non-working oil outlet and the working and non-working heat exchanger oil inlet. The integrally cast baffle rib of the shell and the integrally cast baffle rib of the rear cover cooperate to form a gas guide channel, which is communicated with the air inlet and extends to the bottom of the U-shaped oil pool.

[0006] In some embodiments, the housing further comprises a U-shaped oil sump mating with the rear cover and a fully cast integral oil sump portion. The U-shaped oil sump is formed by the mating portion, the fully cast integral oil sump portion, and the rear cover. The integrally cast housing barrier ribs and the integrally cast rear cover barrier ribs are spatially staggered after assembly. In some embodiments, a barrier rib separating the working oil inlet passage and the U-shaped oil sump is disposed between the first section of the working oil inlet passage and the U-shaped oil sump. The barrier rib is higher than the oil level in the U-shaped oil sump.

[0007] In some embodiments, the cast integrated oil channel further includes a working oil outlet channel, and both ends of the working oil outlet channel are respectively connected to the working oil outlet of the working chamber and the oil inlet of the heat exchanger during docking operation.

[0008] Furthermore, the cast integrated oil channel also includes a second section of the working oil inlet channel, and both ends of the second section of the working oil inlet channel are respectively connected to the first section of the working oil inlet channel and the oil outlet of the heat exchanger during docking operation.

[0009] In some embodiments, the oil outlet of the non-working oil outlet channel is arranged at the outer diameter position of the working chamber.

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

[0011] In some embodiments, a non-working heat exchanger oil outlet is provided on the shell corresponding to the non-working heat exchanger oil inlet, and the non-working heat exchanger oil outlet is connected to the U-shaped oil pool through the non-working oil inlet channel.

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

[0013] The present invention further provides a working method of a retarder, which is based on the above-mentioned retarder and includes: In working state, the air is driven by air pressure; the air enters from the air inlet of the housing, flows downward along the air guide channel formed by the integrally cast baffle ribs of the housing and the rear cover, and squeezes the oil in the U-shaped oil pool; the oil enters the working chamber from the oil inlet through the working oil inlet section to generate braking torque; Oil circulation in working state: 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 oil inlet through the second section of the working oil inlet channel and the first section of the working oil inlet channel; Small oil circulation in non-working state: the oil enters the working chamber from the U-shaped oil pool through the working oil inlet channel; the oil is discharged from the oil outlet at the outer diameter position of the working chamber through the non-working oil outlet channel and flows to the heat exchanger interface; after heat dissipation, the oil returns to the U-shaped oil pool; Cooling cycle: The coolant in the vehicle's water circuit flows from the shell through the heat exchanger, absorbs the heat of the oil and is discharged, and then flows back to the vehicle's water circuit through the shell.

[0014] Compared with the prior art, the retarder housing, retarder and working method for a vehicle of the present invention have the following beneficial effects: The present invention provides a vehicle retarder housing. Through the tooling of the housing and rear cover, the housing integrates integrally cast complete working and non-working circulating oil passages, an integrally cast complete oil pool portion of the housing, and integrally cast inlet and outlet water passages. The rear cover is designed with integrally cast baffle ribs corresponding to the housing, which can avoid all potential failure modes of the traditional retarder assembly oil passages and assembly baffles. At the same time, the integrally cast baffle ribs of the housing and rear cover can effectively avoid the potential risk of oil spraying from the air passage when the retarder is pushed out for operation. The integrally cast inlet and outlet water passages can avoid leakage point failures such as oil-water mixing and oil and water leakage at the inlet and outlet water pipes of the retarder heat exchanger. The present invention can effectively prevent oil from being discharged from the oil pool inlet and outlet, reduce idling loss, and improve response speed; it can increase the oil pool capacity of the retarder, and refueling can be completed at one time; the integrated casting of oil channels reduces parts and corresponding failure points; the integrated casting of oil pool baffle ribs reduces parts and corresponding failure points; and the casting of integrated inlet and outlet water channels can avoid leakage point failures such as oil-water mixing and oil and water leakage at the inlet and outlet pipes of the retarder heat exchanger, optimize the working efficiency and lubrication effect of the retarder, reduce idling loss, and reduce the number of parts and assembly complexity through integrated structural design, thereby improving the reliability and maintenance convenience of the retarder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings in the specification are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

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

[0017] Among them, 1. Shell, 11. Shell integral casting barrier rib, 12. Shell U-shaped oil pool and rear cover matching part, 13. Shell integral casting complete oil pool part, 14. Working chamber working oil outlet, 15. Working oil outlet channel, 16. Working oil inlet channel section, 17. Working oil inlet channel and U-shaped oil pool barrier rib, 18. Working chamber oil inlet, 19. Non-working oil inlet channel; 110. Non-operating oil outlet, 111. Non-operating oil outlet, 112. Coolant outlet, 113. Coolant inlet, 114. Second section of operating oil inlet, 115. Oil outlet of heat exchanger when docking, 116. Oil inlet of heat exchanger when docking, 117. Oil inlet of heat exchanger when docking, 118. Oil outlet of heat exchanger when docking; 2. Rear cover, 21. The rear cover is integrally cast with a barrier rib. DETAILED DESCRIPTION

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0020] Like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0021] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "horizontal," "inner," etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is typically placed when in use. These terms are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only 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 be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections. They may refer to mechanical connections or electrical connections. They may refer to direct connections or indirect connections through an intermediate medium. They may also refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0024] like Figure 1-Figure 5 As shown, the present invention is 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 pool; wherein: The housing 1 is provided with an air inlet, a working chamber oil inlet and outlet, a cast integral oil channel, and a cast integral water inlet and outlet channel; the interior of the housing 1 is provided with a housing integral cast barrier rib 11, and the inner side of the rear cover 2 is provided with a rear cover integral cast barrier rib 21 that is staggered and opposite to the housing integral cast barrier rib 11; The cast integrated oil passage includes a working oil inlet passage section 16 and a non-working oil outlet passage 110. The working chamber oil inlet and outlet ports include a working chamber working oil outlet 14 and a working chamber oil inlet 18. The working oil inlet passage section 16 connects the U-shaped oil pool and the working chamber oil inlet 18. The non-working oil outlet passage 110 connects the non-working oil outlet 111 and the oil inlet 117 of the heat exchanger when docked and not in operation. The integrally cast barrier rib 11 of the housing and the integrally cast barrier rib 21 of the rear cover cooperate to form a gas guide channel, which is connected to the air inlet and extends to the bottom of the U-shaped oil pool.

[0025] The retarder housing for the vehicle of the present invention is assembled by the housing 1 and the rear cover 2 to form a U-shaped oil pool, an air inlet, a cast integral oil channel, and a cast integral water inlet and outlet. The design of the cast integral oil channel and the cast integral water inlet and outlet can reduce the number of parts and reduce the complexity of assembly. The inner side of the rear cover 2 is provided with a rear cover integral cast barrier rib 21 that is staggered and opposite to the housing integral cast barrier rib 11. A directional gas channel is formed by the staggered barrier ribs to constrain the airflow path. The oil channel has a working oil inlet channel section 16 connecting the oil pool and the oil inlet 18 and a working oil outlet channel 15 connecting the oil outlet 14. The housing integral cast barrier rib 11 and the rear cover integral cast barrier rib 21 cooperate to form a gas guide channel that extends to the bottom of the oil pool. Combined with the design of the U-shaped oil pool, the oil storage capacity can be increased, the oil path can be shortened, and the stability of the structure can be improved.

[0026] Furthermore, the U-shaped oil pool of the present invention is formed by the combination of the U-shaped oil pool of the shell and the matching part 12 of the rear cover, the complete oil pool part 13 of the shell integrally cast and the rear cover 2, which can expand the oil storage space. Combined with the shell integrally cast partition ribs 11 and the rear cover integrally cast partition ribs 21 distributed in a spatially staggered manner, it can reduce the oil splash path and improve the sealing performance.

[0027] The height of the working oil inlet channel and the U-shaped oil sump barrier rib 17 is higher than the refueling level of the U-shaped oil sump, physically preventing excessive oil from flowing into the working chamber during non-operating conditions, thereby 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 working oil inlet channel section 114 are respectively connected to the working oil inlet channel section 16 and the heat exchanger oil outlet 115 during docking operation; this segmented oil channel accelerates circulation.

[0028] Furthermore, the outlet of the non-working oil outlet channel 110 of the present invention is located at the outer diameter of the working chamber, allowing the centrifugal force of the rotor to eject 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 connection.

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

[0030] The present invention further provides a working method of a retarder, which is based on the retarder of the present invention and includes: In the working state, the air is driven by air pressure; the air enters from the air inlet of the housing 1, flows downward along the air guide channel formed by the integrally cast barrier rib 11 of the housing and the integrally cast barrier rib 21 of the rear cover, and squeezes 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 channel section 16 to generate braking torque; In the working state, the oil in the working chamber flows out from the working chamber working oil outlet 14 to the heat exchanger interface; after cooling, the oil returns to the working chamber oil inlet 18 through the working oil inlet passage section 2 114 and the working oil inlet passage section 16 in sequence; Small oil circulation in the non-working state: the oil enters the working chamber from the U-shaped oil pool through the working oil inlet passage 16; the oil is discharged from the oil outlet at the outer diameter of the working chamber through the non-working oil outlet passage 110 and flows to the heat exchanger interface; after heat dissipation, the oil returns to the U-shaped oil pool through the non-working oil inlet passage 19; Cooling cycle: The coolant in the vehicle's water circuit flows from the shell 1 through the heat exchanger, absorbs the heat of the oil and is discharged, and then flows back to the vehicle's water circuit through the shell 1.

[0031] The following is a detailed description of a retarder housing, a retarder and a working method thereof for a vehicle according to the present invention through specific embodiments.

[0032] The present invention comprises a highly integrated housing 1 and a rear cover 2 with barrier ribs. The housing is integrally cast with a complete oil reservoir 13, and integrally cast oil reservoirs on the oil channel side are located on the left and right sides of the working chamber, forming a U-shaped oil reservoir. This U-shaped reservoir not only increases the retarder's oil capacity, but also shortens the oil inlet path during operation, improving response time. Experiments have shown that this U-shaped reservoir, or oil channel, effectively improves operating response speed, reducing response time by approximately 0.7 seconds.

[0033] The housing 1 of the present invention, with its integrally cast barrier ribs 11 on the oil reservoir side, is assembled with the rear cover 2, which also features integrally cast barrier ribs, to form a complete U-shaped retarder oil reservoir. The rear cover 2, in conjunction with the housing 1, forms a single oil reservoir capable of storing the majority of the retarder fluid. This portion of the oil reservoir forms a staggered, opposing structure with the multiple barrier ribs within the housing.

[0034] In the present invention, the interlaced, integrally cast housing ribs 11 and rear cover ribs 21 serve two purposes: First, when the retarder is deactivated, the oil returns to the oil sump, releasing pressure without directly impacting upwards and entering the retarder airway through the air inlet, thereby causing retarder oil spray. Second, when the retarder is activated, the compressed gas entering the oil sump is controlled so that it does not directly impact the upper surface of the oil, causing it to gradually flow into the airway. Instead, the gas passes through the ribs, reverses direction, and evenly squeezes the oil downwards into the retarder's working chamber.

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

[0036] A section 16 of the working oil inlet channel connects the oil channel side oil pool of the U-shaped oil pool and the retarder oil inlet, and is separated from the oil channel side oil pool by the working oil inlet channel and U-shaped oil pool baffle 17, forming an n-type structure. In order to reduce idling losses, the working oil inlet channel and U-shaped oil pool baffle 17 are higher than the refueling level of the U-shaped structure to prevent the oil from entering the working cavity from the n-type structure oil channel after refueling when the retarder is not working, causing idling losses of the retarder; at the same time, it avoids excessive oil entering when not working, resulting in increased idling losses. The height of the working oil inlet channel and U-shaped oil pool baffle 17 has been verified through theoretical calculations and experiments to ensure that in the non-working state, the negative pressure generated by the rotation of the rotor can allow a small amount of oil to pass through the working oil inlet channel and U-shaped oil pool baffle 17 from the U-shaped oil pool and enter the retarder and the working cavity from the n-type structure oil channel for lubrication.

[0037] The working oil outlet passage 15 of the present invention is connected to the heat exchanger oil outlet 115 during docking operation and the heat exchanger oil inlet 116 during docking operation; the working oil inlet passage section 2 114 is connected to the working oil inlet passage section 16 and the heat exchanger oil outlet 115 during docking operation; when starting to work, the oil enters the oil passage from the oil pool through the n-type structure oil passage, and then enters the working chamber from the oil inlet; after entering the working state, the oil flows out from the oil outlet, passes through the oil outlet passage, enters the heat exchanger from the heat exchanger oil inlet 116 during docking operation, and then flows out from the heat exchanger oil outlet 115 during docking operation, passes through the working oil inlet passage section 2 114, the working oil inlet passage section 16, and then enters the working chamber from the working chamber oil inlet 18, and the cycle is repeated to form an oil circulation state in the working state.

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

[0039] When not working, the oil flows from the oil pool on the N-type oil channel side through the working oil inlet channel section 16 into the retarder oil inlet, passes through the non-working oil outlet channel 10, enters the heat exchanger from the heat exchanger small circulation oil inlet, and then flows out from the heat exchanger small circulation oil outlet to enter the bottom of the oil channel side of the retarder U-shaped structure oil pool, and then the oil flows again from the oil pool N-type oil channel side through the working oil inlet channel section 16 into the retarder oil inlet, and the cycle repeats.

[0040] The shell 1 of the present invention is designed with a cast integrated inlet and outlet water channel. The water channel of the entire vehicle is directly connected to the shell 1. The coolant passes through the shell 1 and enters and exits the heat exchanger to cool the oil. The reliability is high, and at the same time, the oil-water mixing leakage point failure at the inlet and outlet pipes of the existing retarder heat exchanger can be avoided. Through experimental testing, it is verified that the retarder oil channel of the present invention can effectively reduce the idling loss by 0.75kw. At the same time, the integrated cast oil channel structure can reduce the number of shells, multiple intermediate steel plates and other related components required to assemble the oil channel; by reducing the corresponding assembly surface, the performance failure caused by the oil leakage caused by the corresponding joint surface and various failures caused by related components can be eliminated.

[0041] Example like Figures 1-8 As shown, the housing 1 and the rear cover 2 are assembled together to form a U-shaped oil pool of the present invention; Working methods at work: like Figure 2 As shown, 1) When the retarder is working, the gas enters from the upper air inlet of the shell 1. Figure 2 The blue arrow indicates downward flow, forcing the oil from the integrally cast housing oil sump 13, past the working oil inlet passage and U-shaped oil sump baffle 17, through the working oil inlet passage section 16, and into the retarder working chamber through the working chamber oil inlet 18, generating braking torque. This kinetic energy is converted into heat energy in the oil.

[0042] 2) The working chamber oil flows out of the working chamber working oil outlet 14, through the working oil outlet passage 15, and into the heat exchanger at the docking heat exchanger oil inlet 116. After cooling, it flows out of the heat exchanger, through the docking heat exchanger oil outlet 115, through the working oil inlet passage section 2 114, and through the working oil inlet passage section 16, and into the retarder working chamber at the working chamber oil inlet 18. During stable operation, the cycle 2) is repeated, creating the so-called retarder oil major circulation during operation.

[0043] 3) When the retarder stops working, the gas pressure is released and the oil returns to the U-shaped oil pool of the housing and the matching part 12 of the rear cover, squeezing the internal air upward. The air discharge path is as follows: Figure 2 As shown in the upward red arrow direction, when the pressure is released, the oil will be blocked, buffered and redirected by the integrally cast barrier rib 11 of the shell and the integrally cast barrier rib 21 of the rear cover to prevent the oil from being discharged from the air inlet.

[0044] Working method during non-operation: When the retarder is not operating, the rotor rotates, creating negative pressure in the working chamber. This causes oil to enter the working chamber from the integrally cast oil pool 13 on the N-type oil channel side of the housing through the first section of the working oil inlet channel 16 at the working chamber oil inlet 18. The oil then flows through the non-operating oil outlet channel 110, the non-operating oil outlet 111, and the non-operating heat exchanger oil inlet 117. It then enters the heat exchanger through the heat exchanger's small circulation oil inlet. After dissipating heat, it flows out of the heat exchanger's small circulation oil outlet, passes through the non-operating heat exchanger oil outlet 118, and flows through the non-operating oil inlet channel 19. It then enters the working chamber through the integrally cast oil pool 13 on the N-type oil channel side of the housing through the first section of the working oil inlet channel 16 at the working chamber oil inlet 18. This reciprocating cycle forms a small retarder oil circulation during non-operation.

[0045] The coolant flows from the coolant inlet 113 through the heat exchanger to cool the oil, and then passes through the coolant outlet 112 to take away the heat generated by the retarder and dissipate the heat through the vehicle cooling module.

[0046] In summary. The present invention provides a retarder housing, a retarder and a working method thereof for a vehicle. The housing and the rear cover are integrally cast to integrate an oil pool, an oil channel and a water channel, thereby reducing parts and eliminating the risk of sealing failure and oil leakage in the traditional assembled oil channel; the U-shaped oil pool is combined with high-position baffle ribs to shorten the oil inlet path and improve the response speed; the centrifugal oil outlet in the non-working state is combined with negative pressure lubrication to effectively reduce idling losses by 0.75kW; both the working large cycle and the non-working small cycle are forced to flow through the integrated heat exchanger, and the integrally cast water channel is combined to eliminate the oil-water mixing leakage point and improve the heat dissipation efficiency. The present invention improves the reliability of the retarder, reduces energy efficiency and improves the convenience of maintenance through casting integration, dual-circulation oil circuit and airflow control.

[0047] Finally, it should be noted that the above is only a preferred embodiment of the present invention and does not impose any form of limitation on the present invention. Any ordinary technician in this industry can smoothly implement the present invention as shown in the specification and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with this profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A retarder housing for a vehicle, characterized in that: It comprises 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 pool; wherein: The shell (1) is provided with an air inlet, a working chamber oil inlet and outlet, a cast integral oil channel, and a cast integral water inlet and outlet channel; the interior of the shell (1) is provided with a shell integral cast barrier rib (11), and the inner side of the rear cover (2) is provided with a rear cover integral cast barrier rib (21) that is staggered and opposite to the shell integral cast barrier rib (11); The cast integrated oil passage comprises a working oil inlet passage section (16) and a non-working oil outlet passage (110), the working chamber oil inlet and outlet ports comprise a working chamber working oil outlet port (14) and a working chamber oil inlet port (18), the working oil inlet passage section (16) communicates with the U-shaped oil pool and the working chamber oil inlet port (18), and the non-working oil outlet passage (110) communicates between the non-working oil outlet port (111) and the oil inlet port (117) of the heat exchanger when docked in the non-working state; The housing integrally cast barrier rib (11) and the rear cover integrally cast barrier rib (21) cooperate to form a gas guide channel, and the gas guide channel is connected to the air inlet and extends to the bottom of the U-shaped oil pool.

2. The vehicle retarder housing according to claim 1, wherein: The housing (1) further comprises a U-shaped oil pool of the housing and a matching portion of the rear cover (12) and a housing integrally cast complete oil pool portion (13), wherein the U-shaped oil pool is formed by combining the U-shaped oil pool of the housing and the matching portion of the rear cover (12), the housing integrally cast complete oil pool portion (13) and the rear cover (2); the housing integrally cast partition ribs (11) and the rear cover integrally cast partition ribs (21) are spatially staggered after assembly.

3. The vehicle retarder housing according to claim 1, wherein: A working oil inlet passage and U-shaped oil pool barrier rib (17) is provided between the first section (16) of the working oil inlet passage and the U-shaped oil pool; the height of the working oil inlet passage and U-shaped oil pool barrier rib (17) is higher than the refueling level of the U-shaped oil pool.

4. The vehicle retarder housing according to claim 1, wherein: The cast integrated oil channel further comprises a working oil outlet channel (15), the two ends of which are respectively connected to the working chamber working oil outlet (14) and the heat exchanger oil inlet (116) during docking operation.

5. The vehicle retarder housing according to claim 4, wherein: The cast integrated oil channel further comprises a second section of a working oil inlet channel (114), and both ends of the second section of the working oil inlet channel (114) are respectively connected to the first section of the working oil inlet channel (16) and the oil outlet (115) of the heat exchanger during docking operation.

6. The vehicle retarder housing according to claim 1, wherein: The oil outlet of the non-working oil outlet channel (110) is arranged at the outer diameter position of the working chamber.

7. The vehicle retarder housing according to claim 1, wherein: The cast integral water inlet and outlet channel comprises a cooling liquid water inlet channel (113) and a cooling liquid water outlet channel (112) formed on the shell (1).

8. The vehicle retarder housing according to claim 1, wherein: The shell (1) is also provided with a docking non-operating heat exchanger oil outlet (118) corresponding to the docking non-operating heat exchanger oil inlet (117), and the docking non-operating heat exchanger oil outlet (118) is connected to the U-shaped oil pool through the non-operating oil inlet passage (19).

9. A retarder, characterized in that: The retarder comprises the retarder housing for a vehicle according to any one of claims 1 to 8.

10. A method for operating a retarder, characterized in that: The working method of the retarder is based on the retarder according to claim 9, and the working method of the retarder includes: In the working state, the gas is driven by air pressure; the gas enters from the air inlet of the housing (1), flows downward along the gas guide channel formed by the housing integrally cast baffle rib (11) and the rear cover integrally cast baffle rib (21), and squeezes the oil in the U-shaped oil pool; the oil enters the working chamber from the working chamber oil inlet (18) through the working oil inlet passage section (16) to generate a braking torque; In the working state, the oil in the working chamber flows out from the working chamber working oil outlet (14) to the heat exchanger interface; after cooling, the oil returns to the working chamber oil inlet (18) through the working oil inlet passage section 2 (114) and the working oil inlet passage section 1 (16); In the non-working state, the oil is circulated in a small cycle: the oil enters the working chamber from the U-shaped oil pool through the working oil inlet passage (16); the oil is discharged from the oil outlet at the outer diameter of the working chamber through the non-working oil outlet passage (110) and flows to the heat exchanger interface; after heat dissipation, the oil returns to the U-shaped oil pool; Cooling cycle: The coolant in the vehicle water circuit flows from the shell (1) through the heat exchanger, absorbs the heat of the oil and is discharged, and then flows back to the vehicle water circuit through the shell (1).

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