An internal combustion engine intake system and a vehicle equipped with the same

Abstract

An internal combustion engine air intake system and a vehicle equipped with the system, the air intake system includes two air intakes, which are evenly distributed on both sides below a hood of an internal combustion engine, and each air intake is in a flat square shape, and the front section of the air intake is convergent from front to back, and air guide holes are provided at the hood and center grille of the internal combustion engine corresponding to the air intakes, the lateral distance of a single flat square air intake occupies half of the lateral distance of the front of the vehicle, and the two air intakes are distributed close to the lateral middle position of the front of the vehicle, wherein the air intake direction of the air intake is toward the front of the vehicle, and the air intake channel behind the air intake is deflected downward after entering the inner cabin of the internal combustion engine, so as to solve the shortcomings of low air intake efficiency and low dirt removal ability of the air filter intake system of the existing internal combustion engine intake system vehicle under high power state of the internal combustion engine.

Description

Technical Field

[0001] The present invention relates to the technical field of internal combustion engines, and in particular to an air intake system for an internal combustion engine and a vehicle equipped with the same. Background Art

[0002] The air intake device of existing internal combustion engine vehicles is generally located under the front hood of the vehicle or integrated with the engine compartment interior cover, and the air intake method is generally natural aspiration or turbocharging. For this type of air intake system, when the engine is running at high power and high load, for example, when the car is running at a very high speed, or when the car needs to accelerate urgently, the engine needs a huge amount of air, and the gas is easily disturbed when it is inhaled in the traditional type of intake duct, resulting in a decrease in intake efficiency, which causes the engine power to decrease or increase fuel consumption. In addition, for some vehicles that are often at high speeds, such as special racing vehicles or when conventional power vehicles are modified for power in some touring car competitions, the traditional air intake device cannot meet the air intake needs of high speed, high power and high speed, and in some off-road conditions, there may be a risk of water inhalation at the air intake port. At the same time, the requirements for the air filter are high, and the air filter must be checked and replaced regularly.

[0003] It can be seen that the intake system of existing vehicles has the disadvantages of low intake efficiency under certain engine operating conditions, which affect the high power performance of the engine as mentioned above. Summary of the invention

[0004] The embodiment of the present invention provides an internal combustion engine intake system and a vehicle equipped with the system to solve the shortcomings of low intake efficiency and low dirt removal ability of the air filter intake system of the existing internal combustion engine intake system vehicle under high power state of the internal combustion engine.

[0005] In order to achieve the above purpose, the specific solutions provided by the embodiments of the present invention are as follows.

[0006] In a first aspect, an embodiment of the present invention provides an internal combustion engine intake system, comprising:

[0007] An internal combustion engine air intake system comprises two air intake ports which are evenly distributed on both sides below an internal combustion engine cover, and each air intake port is in a flat square shape.

[0008] Optionally, the front section of the air intake is convergent from front to back, and air inlet holes are provided on the engine cover and the center grille of the internal combustion engine corresponding to the air intake.

[0009] Optionally, the lateral distance of the single flat square air inlet is more than half of the lateral distance of the front of the vehicle.

[0010] Optionally, two of the air intakes are located close to the transverse middle of the front of the vehicle.

[0011] Optionally, the air intake direction of the air intake port is toward the front of the vehicle.

[0012] Optionally, the air intake passage behind the air intake port is bent downward after entering the inner compartment of the internal combustion engine.

[0013] Optionally, a movable grille is installed on the upper part of the downwardly deflected portion of the air intake passage, wherein the movable grille can only be opened unidirectionally outward from the inside of the air intake passage by gas pressure.

[0014] Optionally, a drainage baffle is installed behind the movable grille.

[0015] Optionally, the part of the air intake passage behind the air port that bends downward after entering the inner compartment of the internal combustion engine is then bent upward at 45 degrees and connected to the air filter.

[0016] Optionally, the tail ends of the air inlet of the air intake system are respectively connected to two independent air filters, wherein the outlet of one air filter is connected to cylinders 1 and 3 of the internal combustion engine, and the outlet of the other air filter is connected to cylinders 2 and 4 of the internal combustion engine.

[0017] In a second aspect, an embodiment of the present invention provides a vehicle equipped with the above-mentioned internal combustion engine intake system.

[0018] In the embodiment of the present invention, two flat square air inlets are used for air intake, which improves the air intake efficiency during the high-speed travel of the vehicle and helps to improve the engine power characteristics. The air intake duct adopts a convergent form, which improves the air intake speed of subsonic air intake and enhances the air intake ramming effect. The two air intakes are arranged in the middle of the front of the vehicle to prevent the water waves from entering the engine air intake when the vehicle passes through a large waterlogged road at high speed. The convergent air intake duct increases the air intake speed while increasing the kinetic energy of the stolen goods and rainwater entering the air intake duct. A small amount of gas rushes open the movable grille, and the stolen goods and rainwater with greater kinetic energy are discharged from the air intake system through the grille opened outward, which is beneficial to the maintenance of the air filter. The movable grille remains closed when the vehicle is at a low speed, which enhances the air intake efficiency of the vehicle at a low speed and prevents the high-temperature gas in the engine compartment from being sucked back into the air intake system, thereby reducing the engine combustion efficiency. In addition, a drainage baffle is installed at the rear of the grille to prevent the sand and water filtered by the grille from directly entering the engine compartment, so that they can be discharged from the lower part of the chassis. In addition, a secondary deflection is used behind the air intake to prevent sand, gravel and rainwater that are not filtered by the grille from entering the air filter. Through CFD calculations, in order to prevent the deflection angle from being too large and causing excessive airflow pressure loss, the deflection angle is positioned at 45°. In this way, a small amount of unseparated sand, gravel and water will accumulate at the deflection angle.

[0019] At the same time, a small number of vortex generators are placed inside the deflected airflow channel to change the flow state of the gas, increase the turbulent characteristics of the airflow, prevent the gas from separating during the deflection process, and enhance the energy of the airflow entering the air filter. An openable and closable valve is installed at the deflection angle to facilitate the removal of dirt during maintenance.

[0020] In addition, after passing through the air filter, the two intake ducts of the intake system are respectively connected to the No. 1 and No. 3 cylinders and the No. 2 and No. 4 cylinders of the four-cylinder internal combustion engine. According to the ignition sequence of the four-cylinder internal combustion engine, the No. 1 and No. 3 cylinders (or No. 2 and No. 4 cylinders) use independent intake ducts, which can prevent gas cross-flow and increase intake efficiency. It should be pointed out that the intake system of the present invention is not only suitable for naturally aspirated internal combustion engines, but also for internal combustion engines equipped with turbochargers, which can further increase intake efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention and are only used to supplement the claims and the specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work, and the drawings are only used to supplement the claims and the specification for easy understanding, and have no substantial content for the protection of the claims.

[0022] Figure 1 The air intake as seen from the front of the vehicle.

[0023] Figure 2 This is a three-dimensional diagram of the air intake.

[0024] Figure 3 This is the rear view from the air intake.

[0025] Explanation of the reference numerals: 1 - air inlet; 2 - convergent section; 3 - downward curved section; 4 - one-way grille; 5 - tail end; 6 - bottom. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Special reminder, the nouns such as "up", "down", "left" and "right" used to indicate directions appearing below, unless otherwise specified, are based on the direction of the car's movement as the reference direction - "front".

[0027] like Figure 1As shown, the air intake system of the internal combustion engine has two air intakes, which are evenly distributed on both sides below the engine cover, and each air intake is in a flat square shape. The horizontal distance of the flat square is required to be greater than the longitudinal distance to ensure maximum air flow while ensuring the overall aesthetics of the car.

[0028] like Figure 2 As shown, the front section of the air inlet is convergent from front to back, and air duct holes are opened at the engine cover and the middle grille of the internal combustion engine corresponding to the air inlet. The engine cover is 3-5 cm longer than the front section of the air duct hole in the forward driving direction. The convergent front section of the air inlet helps to accelerate the decompression of air in the air inlet duct, thereby enhancing the gas suction effect at high speed and enhancing the air intake of the internal combustion engine at high speed. The engine cover is extended forward than the cross section of the air duct hole to minimize the splashing water, debris or rainwater directly rushing into the air inlet duct and causing adverse effects.

[0029] It should be noted that, unlike the single air intake duct of previous models, or the air intake form that opens downward or is integrated with the front trim of the engine compartment, the lateral distance of the single flat square air intake occupies more than half of the lateral distance of the front of the vehicle, so as to ensure the ramming effect during air intake and improve the air intake efficiency.

[0030] In addition, the two air intakes are arranged in the middle of the front of the vehicle to avoid waves or impurities as much as possible. Especially for some situations of driving in deep water, the water level will be pushed to the surroundings to raise the water level. In addition, the arrangement close to the middle position can further enhance the ramming characteristics of the airflow and improve the air intake efficiency.

[0031] When the airflow passes through the convergent channel and enters the first downward bend, refer to Figure 3 , a movable air intake grille is installed at the rear of the air intake passage. When the air flow pressure is low, the grille is in a closed state. When the air intake pressure increases or there is a foreign object hitting it, the grille will open to discharge the foreign object out of the air intake passage. In addition, the figure does not show the drainage baffle behind the air intake grille, which can prevent debris and water from entering the engine compartment and drain the debris and water out of the engine compartment from under the car chassis.

[0032] Then, if Figure 2 As shown in the figure, the airflow enters the process of flowing downward. At the bottom of the channel, a valve that is easy to open can be installed to facilitate the removal of dirt that may have accumulated in the air intake duct from under the chassis during maintenance. At the same time, some wing-shaped spoilers with protrusions can be set on the inner surface of the bottom of the channel to make the airflow turn as much as possible, generate more turbulent gas to flow upward, and increase the airflow efficiency.

[0033] Then, the airflow flows further and enters the components behind the intake device, such as the air filter.

[0034] After passing through the air filter, the two intake ducts of the intake system are respectively connected to cylinders 1 and 3 and cylinders 2 and 4 of the four-cylinder internal combustion engine. According to the ignition sequence of the four-cylinder internal combustion engine, after cylinder 1 completes the intake stroke, cylinder 3 immediately performs the intake stroke. Therefore, cylinders 1 and 3 (or cylinders 2 and 4) use independent intake ducts to prevent gas crossflow and increase intake efficiency.

[0035] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention. Although this specification is described according to the implementation mode, not every implementation mode contains only one independent technical solution. This description method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An internal combustion engine intake system, characterized in that: There are two air intakes, evenly distributed under the engine cover, and each air intake is in a flat square shape; the air intake has a convergent section, which converges from front to back, and air duct holes are opened at the engine cover and the center grille of the internal combustion engine corresponding to the air intake, and the engine cover is 3-5 cm longer than the front section of the air duct hole in the forward driving direction; the air intake passage behind the air intake deflects downward after entering the internal combustion engine cabin, and enters the vertical section after the downward bending section; a movable grille is installed below the downward bending section, wherein the movable grille can only be opened unidirectionally from the inside of the air intake passage to the outside after being subjected to gas pressure; after the vertical section deflects upward again through the bottom, it is connected to the air filter through the tail; a valve that can be opened and closed is installed at the deflection angle; the lateral distance of a single flat square air intake occupies more than half of the lateral distance of the front of the vehicle.

2. An internal combustion engine intake system according to claim 1, characterized in that: Two of the air intakes are symmetrically distributed close to the middle of the front of the car.

3. An internal combustion engine intake system as claimed in claim 1, characterized in that: The air intake direction of the air intake port is toward the front of the vehicle.

4. An internal combustion engine intake system as claimed in claim 1, characterized in that: A drainage baffle is installed behind the movable grille.

5. An internal combustion engine intake system as claimed in claim 1, characterized in that: The tail ends of the air inlet of the air intake system are respectively connected to two independent air filters, wherein the outlet of one air filter is connected to cylinders 1 and 3 of the internal combustion engine, and the outlet of the other air filter is connected to cylinders 2 and 4 of the internal combustion engine.

6. A vehicle equipped with the internal combustion engine intake system according to any one of claims 1 to 5.

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