Explosion-proof air inlet pipe sensor and actuator protection device for multi-point injection spark-ignition engine

Abstract

The utility model discloses an explosion-proof air inlet pipe sensor and actuator protection device for a multi-point injection spark ignition type engine. The multi-point injection spark ignition type engine is provided with air cylinders, each air cylinder is provided with an air inlet pipe, a connector of each air inlet pipe is provided with a gasket, and each gasket is provided with a metal explosion-proof net. According to the anti-explosion air inlet pipe sensor and actuator protection device for the multi-point injection spark ignition type engine, the gasket at the joint of the air inlet pipe and the cylinder cover is optimized, and the metal anti-explosion net is additionally arranged on the gasket, so that the air inlet pipe and the sensor and the actuator mounted on the air inlet pipe are prevented from being damaged during backfire; parts can be quickly and conveniently protected on the basis that a current air inlet pipe design mechanism is not modified, and meanwhile the gasket is more convenient to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of spark-ignition internal combustion engines, in particular to an explosion-proof intake pipe sensor and an actuator protection device for a multi-point injection spark-ignition engine. Background Art

[0002] In order to achieve the goal of "carbon peak in 2030 and carbon neutrality in 2060", improve the efficiency of energy use, and use new energy engines in automobiles is an important means to achieve the "dual carbon" goal. Hydrogen energy is a common type of new energy. Due to its own characteristics, hydrogen energy has many advantages over traditional energy sources. For example, hydrogen does not produce CO2 emissions after combustion. However, due to the high activity of hydrogen and the wide flammability boundary, when the hydrogen engine is working, hydrogen can easily enter the intake manifold from the cylinder and burn, causing damage to the intake manifold, hydrogen nozzle, pressure sensors arranged on the manifold, actuators and other components. This phenomenon is referred to as backfire. Backfire is usually prone to occur in spark-ignition internal combustion engines with intake port injection, such as internal combustion engines using hydrogen, natural gas and methanol as fuel; and due to the extremely easy diffusion of hydrogen, hydrogen internal combustion engines are more prone to backfire than natural gas and methanol internal combustion engines. Backfire can easily cause automobile engine failure and reduce engine service life. While increasing maintenance costs, it also creates safety hazards for road driving. How to overcome the impact of backfire on the intake pipe and its layout and related parts (sensors, actuators) is a key and difficult point in the field of hydrogen engines.

[0003] At present, hydrogen nozzles are still in the development stage, and there is no mature technology, which is a technical bottleneck restricting hydrogen fuel engines. Foreign manufacturers such as Bosch, BorgWarner, and Liebherr are all developing direct injection nozzles. At present, a Japanese nozzle manufacturer has made some modifications to the multi-point injection nozzle based on the natural gas nozzle for hydrogen multi-point injection. The current hydrogen internal combustion engine system is prone to backfire. There is currently no protection part design for backfire, especially for the protection of the intake pipe, sensors and actuators on the intake pipe, etc., which makes the parts more vulnerable.

[0004] Prior art, patent number CN 202023150442.4, patent name is an explosion-proof and waterproof vehicle hydrogen sensor module, which discloses an explosion-proof and waterproof vehicle hydrogen sensor module, including a shell, a waterproof breathable membrane, an explosion-proof metal mesh fastening ring, an O-ring, a circuit board and a back cover; a first chamber is provided on the top of the shell, and a ventilation window is provided on the first chamber; a waterproof breathable membrane is provided in the first chamber; an explosion-proof metal mesh and a fastening ring; the fastening ring presses the waterproof breathable membrane and the explosion-proof metal mesh on the ventilation window; a cavity is provided in the middle of the fastening ring for airflow to pass through, and the shell has a second chamber, and a circuit board with a hydrogen sensor is fixed in the second chamber; the shell is provided with an annular groove around the bottom of the first chamber, and the O-ring is installed in the annular groove, and the O-ring presses the circuit board to isolate the airflow in the first chamber; the back cover is fixed to the bottom of the shell and seals the second chamber. The utility model can achieve long-term reliability and stability in an open environment, and has good explosion-proof performance; the waterproof and breathable membrane will not loosen due to air pressure or water pressure, and will not affect gas exchange. In the above prior art, the explosion-proof metal mesh is applied to the hydrogen sensor module. Utility Model Content

[0005] In view of the above problems, the utility model provides an explosion-proof intake pipe sensor and actuator protection device for a multi-point injection ignition engine, optimizes the gasket at the interface between the intake pipe and the cylinder head, adds a metal explosion-proof net on the gasket to prevent damage to the intake pipe and the sensor and actuator installed on the intake pipe during backfire. The parts can be protected quickly and conveniently without modifying the current intake pipe design structure, and the replacement of the gasket is also more convenient.

[0006] The utility model adopts the following technical solutions to achieve the above purpose:

[0007] The invention discloses an explosion-proof intake pipe sensor and actuator protection device for a multi-point injection ignition engine. The multi-point injection ignition engine is provided with cylinders, each of which is provided with an intake pipe, each of which has a gasket on its interface, and each of which is provided with a metal explosion-proof net.

[0008] Preferably, the metal explosion-proof net is fixedly connected to the gasket.

[0009] Preferably, the metal explosion-proof net is a stainless steel metal explosion-proof net.

[0010] Preferably, the metal explosion-proof net is in a mesh shape.

[0011] Preferably, the metal explosion-proof net is designed in a lattice shape.

[0012] Preferably, the metal explosion-proof net is set to an irregular shape.

[0013] The beneficial effects of the utility model are:

[0014] The utility model discloses an explosion-proof intake pipe sensor and actuator protection device for a multi-point injection ignition engine, optimizes the gasket at the interface between the intake pipe and the cylinder head, adds a metal explosion-proof net on the gasket to prevent damage to the intake pipe and the sensor and actuator installed on the intake pipe during backfire, can quickly and conveniently protect parts without modifying the current intake pipe design structure, and is more convenient to replace the gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The overall layout diagram of the explosion-proof intake pipe sensor and actuator protection device for a multi-point injection spark ignition engine provided by the embodiment of the utility model;

[0016] Figure 2 A schematic structural diagram of an explosion-proof intake manifold sensor and actuator protection device for a multi-point injection spark ignition engine provided in an embodiment of the utility model.

[0017] In the attached drawings, 1-intake pipe, 2-gasket, 3-metal explosion-proof net. DETAILED DESCRIPTION

[0018] The following is combined with Figures 1-2 The utility model is described in detail with specific implementation modes.

[0019] Please also see Figures 1-2 This embodiment provides an explosion-proof intake pipe sensor and actuator protection device for a multi-point injection spark ignition engine. The multi-point injection spark ignition engine is provided with cylinders, each cylinder is provided with an intake pipe 1, a gasket 2 is provided on the interface of each intake pipe 1, and a metal explosion-proof net 3 is provided on each gasket 2.

[0020] The explosion-proof intake pipe sensor and actuator protection device for a multi-point injection ignition engine of the utility model optimizes the gasket 2 at the interface between the intake pipe 1 and the cylinder head, and adds a metal explosion-proof net 3 on the gasket 2 to prevent damage to the intake pipe 1 and the sensor and actuator installed on the intake pipe 1 during backfire. The parts can be quickly and conveniently protected without modifying the current intake pipe design mechanism, and the explosion-proof function can be realized very conveniently. At the same time, the replacement of the gasket 2 is also more convenient.

[0021] In this embodiment, the metal explosion-proof net 3 and the gasket 2 are fixedly connected.

[0022] The explosion-proof metal mesh 3 is made of high-stability metal. In this embodiment, the metal explosion-proof mesh 3 is a stainless steel metal explosion-proof mesh.

[0023] In this embodiment, the metal explosion-proof net 3 can be set to a mesh shape, a grid shape, an irregular shape or an arbitrary shape.

[0024] The explosion-proof intake pipe sensor and actuator protection device for a multi-point injection ignition engine of the utility model is also applicable to natural gas and methanol internal combustion engines with intake duct injection.

[0025] Although the present invention has been described in detail above with specific implementation methods, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention are within the scope of protection claimed by the present invention.

Claims

1. An explosion-proof intake pipe sensor and actuator protection device for a multi-point injection spark ignition engine, the multi-point injection spark ignition engine is provided with cylinders, each of the cylinders is provided with an intake pipe, and each of the intake pipe interfaces is provided with a gasket, characterized in that: A metal explosion-proof net is arranged on each of the gaskets.

2. The explosion-proof intake pipe sensor and actuator protection device for a multi-point injection spark ignition engine according to claim 1, characterized in that: The metal explosion-proof net is fixedly connected to the gasket.

3. The explosion-proof intake pipe sensor and actuator protection device for a multi-point injection spark ignition engine according to claim 1, characterized in that: The metal explosion-proof net is a stainless steel metal explosion-proof net.

4. The explosion-proof intake pipe sensor and actuator protection device for a multi-point injection spark ignition engine according to claim 1, characterized in that: The metal explosion-proof net is designed in a mesh shape.

5. The explosion-proof intake pipe sensor and actuator protection device for a multi-point injection spark ignition engine according to claim 1, characterized in that: The metal explosion-proof net is designed in a lattice shape.

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