Intake manifold assembly

Abstract

The utility model relates to the technical field of engines, and particularly discloses an intake manifold assembly which is arranged between an air damper and air inlet channels on an air cylinder cover in a communicated mode and comprises an upper shell and a lower shell which are in butt joint with each other, a main cavity is formed between the upper shell and the lower shell, and a flange connector is arranged at one end of the lower shell. One end of the flange joint communicates with the main chamber, and the other end of the flange joint communicates with the throttle valve; a plurality of manifold cavities are formed in the end, away from the flange connector, of the lower shell, communicate with the main cavity and communicate with the multiple air inlet channels correspondingly. An oil rail is arranged on the upper shell, a plurality of mounting pipes are arranged on the lower shell, one mounting pipe is communicated with one manifold cavity, oil sprayers are arranged in the mounting pipes, and the oil sprayers are communicated with the oil rail; one end of the oil sprayer far away from the oil rail extends out of the manifold cavity; the problems that under the same displacement, a naturally aspirated engine is usually low in power, low in overall engine efficiency and the like are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an intake manifold assembly. Background Art

[0002] The intake manifold refers to the intake pipe from the carburetor or throttle body to the cylinder head intake duct. Its function is to distribute the air and fuel mixture from the carburetor or throttle body to the intake duct of each cylinder.

[0003] Most automotive engines currently on the market can be categorized based on how their intake systems work: naturally aspirated, turbocharged, and supercharged. Naturally aspirated engines are the most common and are also the most common type used in range-extender engines. Due to their mature technology and long history, naturally aspirated engines exhibit exceptional durability and reliability. Compared to turbocharged engines, naturally aspirated engines offer more linear power delivery and a smoother, more natural driving experience. For the same displacement, naturally aspirated engines are relatively affordable, offering a cost advantage. Their relatively simple structure reduces maintenance and repair costs. However, since naturally aspirated engines lack external supercharging, they often produce lower power for the same displacement, resulting in lower overall engine efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide an intake manifold assembly, which solves the problems of naturally aspirated engines often having low power at the same displacement and low overall engine efficiency.

[0005] The utility model is realized by the following technical solutions: an intake manifold assembly is connected between the throttle valve and each intake passage on the cylinder head, comprising an upper shell and a lower shell connected to each other, a main chamber is formed between the upper shell and the lower shell, and a flange joint is provided at one end of the lower shell, one end of the flange joint is connected to the main chamber, and the other end of the flange joint is connected to the throttle valve;

[0006] The lower housing is provided with a plurality of manifold cavities at one end away from the flange joint, the manifold cavities are communicated with the main chamber, and the plurality of manifold cavities are respectively communicated with the plurality of air inlet passages;

[0007] The upper shell is provided with an oil rail, and the lower shell is provided with a plurality of mounting pipes, one of the mounting pipes is communicated with a manifold cavity, a fuel injector is installed in the mounting pipe, and a plurality of the fuel injectors are communicated with the oil rail.

[0008] Furthermore, one end of the fuel injector away from the fuel rail extends out of the manifold cavity.

[0009] Furthermore, a plurality of limiting holes are arranged at intervals on the upper shell, and a mounting tube is arranged in one of the limiting holes.

[0010] Furthermore, a first mounting seat is provided on the upper shell, and a carbon canister solenoid valve is installed on the first mounting seat.

[0011] Furthermore, a first mounting hole is provided on the upper shell, the first mounting hole is communicated with the main chamber, and a temperature-pressure integrated sensor is installed in the first mounting hole.

[0012] Furthermore, a plurality of second mounting seats are provided on the upper shell, and air filters are provided on the second mounting seats.

[0013] Furthermore, a plurality of third mounting seats are provided on the upper shell, and the oil rail is fixed on the plurality of third mounting seats.

[0014] Furthermore, a second mounting hole is provided on the lower shell, the second mounting hole is communicated with the main chamber, and a TEV connecting pipe joint is provided on the second mounting hole.

[0015] Furthermore, a third mounting hole is provided on the lower shell, the third mounting hole is communicated with the main chamber, and a PVC connecting pipe joint is provided on the third mounting hole.

[0016] Furthermore, a plurality of positioning pins are provided on the lower shell, and one positioning pin is provided between every two adjacent manifold cavities.

[0017] The technical solution of the utility model has at least the following advantages and beneficial effects:

[0018] 1. The fuel injector installed on the intake manifold sprays fuel into each intake manifold air passage according to the ECU instructions, spraying the fuel into the position of the intake pipe near the cylinder head air passage, so that the fuel and air are mixed and enter the engine cylinder; this ensures the efficient use of fuel and the smooth operation of the engine. Compared with traditional naturally aspirated engines, the fuel injection control can be controlled by the ECU according to performance requirements, thereby adjusting the engine's power performance.

[0019] 2. The end of the injector away from the fuel rail extends out of the manifold cavity, and gasoline is pumped in by the positive pressure of the fuel rail and the injector, so that the manifold cavity can be set relatively short. Compared with the intake channel of the intake manifold of a traditional naturally aspirated engine, the intake channel of the present application, i.e., the manifold cavity, can be set shorter, and the volume of the entire intake manifold will also be reduced accordingly, saving space and the manufacturing materials and costs of the intake manifold.

[0020] 3. The fuel rail is driven by the oil pump of the vehicle's fuel tank, and then transports the oil to each injector through the fuel rail. There is no need to install an additional high-pressure oil pump, and it can achieve fuel injection operations similar to those of a supercharged engine, thereby adjusting the performance and efficiency of a naturally aspirated engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of the three-dimensional structure of an intake manifold assembly provided by the utility model;

[0023] Figure 2 This is a structural schematic diagram of an intake manifold assembly provided by the present invention, which is located on one side of an upper housing;

[0024] Figure 3 A schematic diagram of the three-dimensional structure of an upper housing of an intake manifold assembly provided by the present invention;

[0025] Figure 4 This is a schematic diagram of the three-dimensional structure of the lower housing of the intake manifold assembly provided by the utility model;

[0026] Icons: 1. Main chamber, 2. Upper shell, 21. Limit hole, 22. First mounting seat, 23. First mounting hole, 24. Second mounting seat, 25. Third mounting seat, 3. Lower shell, 31. Flange joint, 32. Manifold chamber, 33. Mounting pipe, 34. Second mounting hole, 35. Third mounting hole, 36. Locating pin, 4. Fuel rail, 41. Injector, 5. TEV connecting pipe joint, 6. PVC connecting pipe joint. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in 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 some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0028] 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 claimed invention, 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 are also within the scope of protection of the present invention.

[0029] Reference Figures 1 to 4 As shown, this embodiment provides an intake manifold assembly, which is connected and arranged between the throttle valve and each intake passage on the cylinder head, and is characterized in that it includes an upper shell 2 and a lower shell 3 that are connected to each other. The upper shell 2 and the lower shell 3 are both made of PA6+GF30. The upper shell 2 and the lower shell 3 are integrated by friction welding. A main chamber 1 is formed between the upper shell 2 and the lower shell 3. A flange joint 31 is provided at one end of the lower shell 3. One end of the flange joint 31 is connected to the main chamber 1, and the other end of the flange joint 31 is connected to the throttle valve and is fixed by bolts. A rubber sealing ring is provided on the end face of the flange joint 31 to provide a good seal when connected to the throttle valve.

[0030] like Figure 1 and Figure 4 As shown, a plurality of manifold cavities 32 are provided at one end of the lower shell 3 away from the flange joint 31. The manifold cavities 32 are connected to the main chamber 1. The plurality of manifold cavities 32 are respectively connected to a plurality of intake ducts, so that the air enters the main chamber 1 through the throttle valve and is evenly distributed through the plurality of manifold cavities 32 and enters each cylinder of the engine respectively.

[0031] like Figure 1-Figure 4 As shown, the upper shell 2 is provided with an oil rail 4. More specifically, the upper shell 2 is further provided with a plurality of third mounting seats 25, and the oil rail 4 is fixed on the plurality of third mounting seats 25. At the same time, a plurality of mounting tubes 33 are provided on the lower shell 3. A mounting tube 33 is connected to a manifold cavity 32. Injectors 41 are installed in the mounting tubes 33. The plurality of injectors 41 are connected to the oil rail 4. The oil rail 4 is driven by the oil pump of the vehicle's fuel tank, and then the oil is transported to each injector 41 through the oil rail 4, without the need for an additional high-pressure oil pump.

[0032] During specific implementation, the air after engine supercharged passes through the vehicle air cooler, and then enters the main chamber 1 in the intake manifold through the throttle body installed on the intake manifold, and then enters the engine cylinders through the manifold chambers 32 of the intake manifold; at the same time, the injector 41 installed on the intake manifold sprays fuel to each intake manifold air passage according to the ECU instruction, and sprays it on the position of the intake pipe close to the cylinder head air passage, so that the fuel and air are mixed and enter the cylinder of the engine; ensuring the efficient use of fuel and the smooth operation of the engine. Compared with the traditional naturally aspirated engine, the fuel injection control can be controlled by the ECU according to performance requirements, and then the power performance of the engine is adjusted, especially for the range extender engine, which can be adjusted in real time according to the needs of the whole vehicle, and high-performance power generation can be achieved when feeding power to meet the power requirements for charging and driving; when the battery power is sufficient or sufficient, the performance can be appropriately reduced to meet the normal power generation and driving, and the injection status can also be adjusted in real time according to power requirements.

[0033] More specifically, Figure 1 As shown, the injector 41 extends out of the manifold cavity 32 at one end away from the fuel rail 4, and gasoline is pumped in by the positive pressure of the fuel rail 4 and the injector 41, so that the manifold cavity 32 can be set to be relatively short. Compared with the intake channel of the intake manifold of a traditional naturally aspirated engine, the intake channel of the present application, i.e., the manifold cavity 32, can be set to be shorter, and the volume of the entire intake manifold will also be reduced accordingly, saving space and the manufacturing materials and costs of the intake manifold.

[0034] like Figure 1-Figure 4 As shown, a plurality of limiting holes 21 are arranged at intervals on the upper shell 2, and a mounting tube 33 is arranged in a limiting hole 21, which facilitates the docking of the upper shell 2 and the lower shell 3 while limiting the mounting tube 33, thereby protecting the mounting tube 33 and the injector 41.

[0035] like Figure 2 As shown, a first mounting seat 22 is provided on the upper shell 2, and a carbon canister solenoid valve is installed on the first mounting seat 22 for controlling the flow of fuel vapor from the carbon canister to the engine to prevent the fuel vapor from escaping into the atmosphere.

[0036] like Figure 2As shown, the upper housing 2 is provided with a first mounting hole 23, which communicates with the main chamber 1. A temperature-pressure integrated sensor is mounted within this hole. This integrated sensor primarily detects intake air temperature and pressure. The intake manifold pressure sensor monitors the absolute pressure in the intake manifold behind the throttle in real time. The sensor converts the monitored intake pressure and temperature data into electrical signals and transmits them to the engine control unit (ECU). The ECU calculates the current intake air volume based on this data and compares it with the set intake volume to adjust the fuel injection quantity and ignition advance angle to ensure optimal engine operation. By accurately monitoring intake air pressure and temperature, the ECU can more accurately calculate the required fuel quantity, enabling precise control of fuel injection. This helps reduce energy consumption, improve fuel economy, and reduce harmful emissions.

[0037] like Figure 1 and Figure 2 As shown, a plurality of second mounting seats 24 are further provided on the upper shell 2, and fixing holes are provided on the second mounting seats 24, and shock-absorbing pads are provided in the fixing holes. An air filter is installed on the third mounting seat 25, and the shock-absorbing pad can reduce the vibration of the air filter. When air flows through the filter, the filter medium will effectively block solid impurities such as dust, pollen, and abrasive particles, as well as some harmful gases and substances, such as moisture, soot, ozone, odor, carbon oxides, SO2, CO2, etc., thereby ensuring that the air quality entering the engine or other equipment is optimal.

[0038] like Figure 1 and Figure 4 As shown, a second mounting hole 34 is provided on the lower shell 3, and the second mounting hole 34 is connected to the main chamber 1. A TEV connecting pipe joint 5 is provided on the second mounting hole 34, which is mainly used to connect the exhaust gas recirculation TEV system. The exhaust gas regulated by the EGR valve is reintroduced into the intake manifold through the TEV connecting pipe joint 5; in the intake manifold, the exhaust gas is mixed with fresh air and then enters the cylinder together for combustion; the recirculation of exhaust gas is realized, thereby reducing nitrogen oxide emissions, improving fuel economy, improving engine performance, and complying with environmental protection regulations.

[0039] like Figure 1 and Figure 4 As shown, lower housing 3 is provided with a third mounting hole 35, which communicates with main chamber 1. A PVC connecting pipe joint 6 is provided in communication with third mounting hole 35. One end of PVC connecting pipe joint 6 is connected to the intake manifold, and the other end is connected to the crankcase. Through this connecting pipe joint, exhaust gas from the crankcase is guided to the intake manifold, where it mixes with fresh air and re-enters the cylinder for combustion. This helps reduce pressure and temperature within the crankcase, preventing oil deterioration and leakage.

[0040] like Figure 1 As shown, a plurality of positioning pins 26 are further provided on the upper shell 2, and a positioning pin 26 is provided between every two adjacent manifold cavities 32, thereby facilitating the rapid docking of the intake manifold and the cylinder head, and further enabling the manifold cavity 32 to be quickly docked with each air passage.

[0041] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An intake manifold assembly, connected between the throttle valve and each intake passage on the cylinder head, characterized by: The invention comprises an upper shell (2) and a lower shell (3) that are connected to each other, a main chamber (1) is formed between the upper shell (2) and the lower shell (3), and a flange joint (31) is provided at one end of the lower shell (3), one end of the flange joint (31) is communicated with the main chamber (1), and the other end of the flange joint (31) is communicated with the throttle valve; A plurality of manifold cavities (32) are provided at one end of the lower shell (3) away from the flange joint (31), the manifold cavities (32) are communicated with the main chamber (1), and the plurality of manifold cavities (32) are respectively communicated with the plurality of air inlet passages; An oil rail (4) is provided on the upper shell (2), and a plurality of mounting pipes (33) are provided on the lower shell (3). One of the mounting pipes (33) is communicated with one of the manifold chambers (32). A fuel injector (41) is installed in the mounting pipe (33), and a plurality of the fuel injectors (41) are communicated with the oil rail (4).

2. The intake manifold assembly according to claim 1, characterized in that: One end of the fuel injector (41) away from the fuel rail (4) extends out of the manifold cavity (32).

3. The intake manifold assembly according to claim 2, characterized in that: A plurality of limiting holes (21) are arranged at intervals on the upper shell (2), and a mounting tube (33) is arranged in one of the limiting holes (21).

4. The intake manifold assembly according to claim 3, characterized in that: A first mounting seat (22) is provided on the upper shell (2), and a carbon canister solenoid valve is installed on the first mounting seat (22).

5. The intake manifold assembly according to claim 4, characterized in that: A first mounting hole (23) is provided on the upper shell (2), the first mounting hole (23) is communicated with the main chamber (1), and a temperature-pressure integrated sensor is installed in the first mounting hole (23).

6. The intake manifold assembly according to claim 5, characterized in that: A plurality of second mounting seats (24) are also provided on the upper shell (2), and an air filter is provided on the second mounting seats (24).

7. The intake manifold assembly according to claim 6, characterized in that: The upper shell (2) is further provided with a plurality of third mounting seats (25), and the oil rail (4) is fixedly mounted on the plurality of third mounting seats (25).

8. The intake manifold assembly according to claim 7, characterized in that: The lower shell (3) is provided with a second mounting hole (34), the second mounting hole (34) is communicated with the main chamber (1), and a TEV connecting pipe joint (5) is provided in communication with the second mounting hole (34).

9. The intake manifold assembly according to claim 8, characterized in that: The lower shell (3) is provided with a third mounting hole (35), the third mounting hole (35) is communicated with the main chamber (1), and a PVC connecting pipe joint (6) is provided in communication with the third mounting hole (35).

10. The intake manifold assembly according to claim 9, characterized in that: A plurality of positioning pins (36) are also provided on the lower shell (3), and one positioning pin (36) is provided between every two adjacent manifold cavities (32).

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