Folding type intake manifold system of amphibious vehicle and control method of folding type intake manifold system

Abstract

The invention discloses an amphibious vehicle folding type intake manifold system and a control method thereof, the system comprises a group of hollow branch pipes, the adjacent hollow branch pipes are connected through corrugated sealing pipes, and memory alloy hinges are arranged inside or outside the corrugated sealing pipes to form a folding type manifold structure. And the group of hollow branch pipes are three-section type titanium alloy branch pipes. According to the folding type intake manifold system of the amphibious vehicle and the control method of the folding type intake manifold system, the design is reasonable, the folding manifold is combined with the air pressure triggering sealing technology, the storage size is successfully reduced, the overwater unfolding time is short, zero leakage is achieved under the high water pressure, meanwhile, the intake pressure loss is reduced, and the power loss is optimized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of amphibious vehicles, in particular to a folding air intake manifold system of amphibious vehicles and a control method thereof. BACKGROUND

[0002] The air intake system of amphibious vehicles needs to consider both efficient ventilation on land and complete sealing in water. Currently, the industry generally adopts a fixed high-position air intake manifold design. Although this technical route can ensure basic waterproof performance, it is limited by the unchangeable structure, which leads to collision damage due to the protruding roof when driving on land. Moreover, the airflow resistance caused by the long pipeline results in a loss of intake pressure of the turbocharged engine, directly leading to a decrease in maximum power. More seriously, the existing folding manifold has insufficient sealing performance under water pressure, with a leakage rate far exceeding the national standard.

[0003] In the prior art, in order to improve spatial adaptability, CN201610530913.3 proposes a hinged engine air intake pipeline scheme, which passes through a round hole of a hood and is coupled with the hood by fasteners, realizing mutual cooperation and independence of the air intake pipeline and the hood, and the air intake pipeline and the hood can be integrally disassembled. However, this design has two essential defects: first, the O-ring seal at the hinge has a leakage rate far exceeding the limit value specified in the national standard under water pressure; second, the long air intake pipeline causes pressure loss, directly leading to a decrease in engine power. These prior arts have not solved the problem of coordinated optimization among spatial adaptability, power performance, and sealing reliability. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a folding air intake manifold system of amphibious vehicles and a control method thereof, which has a reduced storage volume, a short unfolding time on water, and a low risk of leakage under water.

[0005] To solve the above technical problems, the technical solution adopted by the present application is as follows:

[0006] A folding air intake manifold system of amphibious vehicles, comprising a set of hollow branch pipes, adjacent hollow branch pipes being connected through corrugated sealing pipes, and a memory alloy hinge being provided in or outside the corrugated sealing pipe to form a folding manifold structure.

[0007] The set of hollow branch pipes are three-section titanium alloy branch pipes.

[0008] The memory alloy hinge has a phase transition temperature and is triggered to unfold to a preset angle of 120°.

[0009] The corrugated sealing pipe is embedded in the hinge shaft.

[0010] The memory alloy hinge is in the shape of a corrugated pipe.

[0011] A heater is arranged corresponding to the shape memory alloy hinge.

[0012] The titanium alloy branch pipe is coated with a polytetrafluoroethylene hydrophobic coating.

[0013] The shape memory alloy hinge has an annular groove, and a radially expandable ring is arranged in the annular groove.

[0014] The control module also includes switching logic, which is that when the laser ranging sensor detects that the water depth is greater than or equal to a certain value, the ECU is powered to heat the shape memory alloy hinge to quickly complete the unfolding; if the air pressure sensor detects that the pressure inside the manifold is greater than a set value, the redundant electromagnetic sealing ring is activated.

[0015] A control method of the amphibious vehicle folding intake manifold system, comprising the following steps: detecting the vehicle working condition and making a decision through a group of sensors; controlling the folding manifold to quickly complete the unfolding / retreating; dynamically adjusting the sealing pressure and the manifold angle to balance the aerodynamic efficiency and the waterproof demand.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] The amphibious vehicle folding intake manifold system and the control method thereof are rationally designed, the folding manifold is combined with the air pressure triggered sealing technology, the storage volume is successfully reduced, the unfolding time on water is short, zero leakage is realized under high water pressure, the intake pressure loss is reduced, and the power loss is optimized. BRIEF DESCRIPTION OF DRAWINGS

[0018] The content expressed by each figure in the present specification and the marks in the figures are briefly described as follows:

[0019] Figure 1 It is a control logic flow diagram of the present application.

[0020] Figure 2 It is a corrugated sealing pipe diagram of the present application.

[0021] Figure 3 It is an intake manifold diagram of the present application.

[0022] Figure 4 It is a shape memory alloy hinge diagram of the present application.

[0023] Figure 5 It is a silica gel sealing ring arrangement diagram of the present application.

[0024] In the figure:

[0025] 1. corrugated sealing pipe, 2. shape memory alloy hinge, 3. three-section titanium alloy branch pipe, 4. silica gel sealing ring. DETAILED DESCRIPTION

[0026] The specific embodiments of the present application will be further described in detail below with reference to the drawings and the description of the embodiments.

[0027] As shown in the figure, the amphibious vehicle folding intake manifold system comprises a set of hollow branch pipes, adjacent hollow branch pipes are connected through corrugated sealing pipes 1, and memory alloy hinges are arranged in or outside the corrugated sealing pipes to form a folding manifold structure. Figures 1 to 5

[0028] The set of hollow branch pipes are three-section titanium alloy branch pipes 3. The memory alloy hinges have a phase change temperature and are triggered to expand to a preset angle of 120°. Preferably, the corrugated sealing pipes are embedded in the hinge shaft, and the memory alloy hinge material is nickel-titanium alloy Ni-Ti alloy.

[0029] The memory alloy hinge 2 is in the shape of a corrugated pipe, and a heater is arranged corresponding to the memory alloy hinge, and the heater can be wrapped with a heating film.

[0030] The surface of the titanium alloy branch pipe is coated with a polytetrafluoroethylene hydrophobic coating, which has extremely low surface energy and excellent hydrophobic properties on the surface of the branch pipe, which can not only prevent water and dirt, but also has certain corrosion resistance, and the contact angle is greater than or equal to 150°.

[0031] The memory alloy hinge has an annular groove, and a radial expansion ring is arranged in the annular groove. Preferably, the radial expansion ring can be a silica gel sealing ring 4 or an electromagnetic sealing ring.

[0032] The system also comprises a control module, and the switching logic of the control module is that when the laser ranging sensor detects that the water depth is greater than or equal to a certain value, the ECU is powered on to heat the shape memory alloy hinge to quickly complete the expansion; if the air pressure sensor detects that the internal pressure of the manifold is greater than a set value, the redundant electromagnetic sealing ring is activated.

[0033] The control method of the amphibious vehicle folding intake manifold system comprises the following steps: detecting the working condition of the vehicle and making a decision through a set of sensors; controlling the folding manifold to quickly complete the expansion / withdrawal; dynamically adjusting the sealing pressure and the manifold angle to balance the aerodynamic efficiency and the waterproof demand.

[0034] The amphibious vehicle folding intake manifold system and the control method thereof are reasonable in design, adopt a foldable manifold combined with air pressure triggered sealing technology, successfully reduce the storage volume, have a short water expansion time, realize zero leakage under high water pressure, reduce the intake pressure loss, and optimize the power loss.

[0035] The preferred specific examples of the present application are as follows:

[0036] ​A foldable intake manifold system for amphibious vehicles is provided. The foldable manifold consists of three sections of titanium alloy branch pipes, which are connected by shape memory alloy hinges. A corrugated sealing tube is embedded in the hinge axis and automatically forms a waterproof channel as the manifold unfolds. When the intake pressure increases to a set value, the silicone ring radially expands to compensate for the assembly gap and triggers locking.

[0037] The three-section titanium alloy branch pipe 3 is connected by a shape memory alloy hinge 2. The shape memory alloy hinge 2 has a phase change temperature and unfolds to a preset angle of 120° after being triggered. The corrugated sealing pipe 1 is embedded in the axis of the shape memory alloy hinge 2 and forms an S-shaped waterproof channel after unfolding, which can withstand high pressure.

[0038] The pneumatic trigger locking structure is a silicone sealing ring. When the inlet pressure is greater than a certain value, the silicone sealing ring expands radially to compensate for the assembly gap and form a support lock.

[0039] The control module integrates a laser rangefinder and a barometric pressure sensor to adjust the manifold sealing status in real time. The switching logic of the control module includes: when the laser rangefinder detects a water depth greater than or equal to a certain value, the ECU is powered on to heat the shape memory alloy hinge, which quickly unfolds, thus realizing the switching of the intake manifold status.

[0040] A switching control method is provided as follows: Initially, a laser rangefinder sensor detects water depth: The laser rangefinder sensor starts working and detects the current water depth. It then determines if the water depth is greater than or equal to a certain value: If yes (water depth greater than or equal to a certain value): The ECU is powered on and heats the shape memory alloy hinge, causing it to quickly unfold, and then proceeds to the next step. If no (water depth less than a certain value): The operation of energizing the shape memory alloy hinge by the ECU is not executed, and the process proceeds directly to the next step. Next, a pressure sensor detects the internal pressure of the manifold: The pressure sensor starts detecting the internal pressure of the manifold. It then determines if the internal pressure of the manifold is greater than a set value: If yes (internal pressure of the manifold is greater than a set value): The redundant electromagnetic seal is activated, and the process proceeds to the next step. If no (internal pressure of the manifold is less than or equal to a set value): The operation of activating the redundant electromagnetic seal is not executed, and the process ends directly.

[0041] This invention employs a foldable manifold combined with pneumatic trigger sealing technology, successfully reducing the storage volume; it has a short deployment time on water and achieves zero leakage under high water pressure, while reducing intake pressure loss and optimizing power loss.

[0042] The above description is merely an illustration of preferred embodiments of the present invention, and the above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0043] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the concept and technical solution of the present invention, or the direct application of the concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A foldable intake manifold system for amphibious vehicles, characterized in that: It includes a set of hollow branch pipes, and adjacent hollow branch pipes are connected by corrugated sealing pipes. The corrugated sealing pipes are equipped with shape memory alloy hinges inside or outside to form a folded manifold structure.

2. The amphibious vehicle folding intake manifold system as described in claim 1, characterized in that: The set of hollow branch pipes is a three-section titanium alloy branch pipe.

3. The amphibious vehicle folding intake manifold system as described in claim 1, characterized in that: The shape memory alloy hinge has a phase transition temperature and unfolds to a preset angle of 120° after being triggered.

4. The amphibious vehicle folding intake manifold system as described in claim 1, characterized in that: The corrugated sealing tube is embedded in the hinge axis.

5. The amphibious vehicle folding intake manifold system as described in claim 1, characterized in that: The shape memory alloy hinge has a corrugated tube shape.

6. The amphibious vehicle folding intake manifold system as described in claim 1, characterized in that: A heater is provided corresponding to the shape memory alloy hinge.

7. The amphibious vehicle folding intake manifold system as described in claim 2, characterized in that: The surface of the titanium alloy branch pipe is coated with a polytetrafluoroethylene hydrophobic coating.

8. The amphibious vehicle folding intake manifold system as described in claim 5, characterized in that: The shape memory alloy hinge has an annular groove, and a radially expandable ring is provided inside the annular groove.

9. The amphibious vehicle folding intake manifold system as described in claim 1, characterized in that: It also includes a control module. The switching logic of the control module is as follows: when the laser rangefinder detects that the water depth is greater than or equal to a certain value, the ECU is powered on to heat the shape memory alloy hinge and quickly completes the unfolding; if the pressure sensor detects that the internal pressure of the manifold is greater than the set value, the redundant electromagnetic sealing ring is activated.

10. A control method for a folding intake manifold system of an amphibious vehicle, characterized in that: Includes the following steps: It detects vehicle operating conditions and makes decisions through a set of sensors; controls the folding manifold to quickly unfold / retract; and dynamically adjusts the sealing pressure and manifold angle to balance aerodynamic efficiency and waterproofing requirements.

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