TWI421408B - Port fuel injection engine with a pressure-wave device - Google Patents

Description

Fistula fuel injection engine with pressure wave device

The present invention relates to a manifold fuel injection engine, and more particularly to a manifold fuel injection engine having a pressure wave device.

Referring to Figure 1, a schematic diagram of a conventional fuel injection (Port Fuel Injection, PFI) engine is shown. It is mainly provided with a piston 12 in the cylinder block 11 and an intake manifold 13 , an exhaust manifold 14 , an intake valve 15 , an exhaust valve 16 and a spark plug 17 communicating with the combustion chamber 111 of the cylinder block 11 . An injection nozzle 18 is disposed on the intake manifold 13 , and the fuel injection portion 181 of the injector 18 is connected to the tube of the intake manifold 13 by intake, compression, ignition, and Processes such as venting allow the PFI engine to be powered, but the PFI engine still has immediate improvements in power generation:

Since the injectors 18 of the conventional PFI engine are disposed outside the intake valve 15 and simultaneously sprayed toward the inner wall of the intake manifold 13 and the intake valve 15, the gasoline mist sprayed from the injector 18 is exhausted. When the state of the gasification is not good, the mixture of gasoline atomization and air is adhered to the inner wall of the intake valve 15 and the inner wall of the intake manifold 13 to be deeper, and the mixed gas gradually undergoes chemical changes. So that the inlet valve 15 and the inner wall of the intake manifold 13 form a layer of "charcoal" which is very similar in paint, and the "charcoal" will absorb more gasoline, resulting in thicker and thicker piles. This is one of the reasons why the PFI engine generates carbon deposits, which ultimately makes the PFI engine prone to knocking, shortening engine life, insufficient intake, reducing performance output, idle speed, and engine jitter.

Accordingly, how to develop a manifold fuel injection engine can solve the above-mentioned drawbacks, that is, the motivation for the invention of the present invention.

SUMMARY OF THE INVENTION The object of the present invention is to provide a manifold fuel injection engine with a pressure wave device, which mainly improves the effect of atomizing gasoline fuel of the injector and prolonging the time for forming carbon deposition of the engine.

In order to achieve the foregoing, a manifold fuel injection engine with a pressure wave device according to the present invention includes: a cylinder block having a combustion chamber, the combustion chamber being provided with a connected intake air a door, an exhaust valve, a spark plug, and an exhaust manifold; a piston movably disposed in the combustion chamber of the cylinder block; and an intake manifold having an intake air communicating with the combustion chamber a fuel injection nozzle having a fuel injection portion disposed in an intake pipe of the intake manifold; a kit sleeved outside the fuel injector, the kit having a gas inlet and a suction port a space in which the intake pipe of the pipe communicates; a pressure wave generating device disposed in the kit, and causing a space in the space of the kit to transmit a pressure wave to the intake pipe of the intake manifold to allow fuel of the injector The molecules are smaller after atomization.

Preferably, the inlet manifold wall has a through hole that allows the intake duct to communicate with the space of the kit.

Preferably, the space of the kit has a first port and a second port. The first port is disposed on the outer tube wall of the intake manifold and covers the through hole of the intake manifold. The second port is provided for the pressure wave generating device.

Preferably, the pressure wave generating device is composed of a coil, a strong magnet disposed outside the coil, a movable pusher disposed on the coil, and a second port disposed on the sleeve and can be The film is composed of the push-pull film.

Preferably, the coil of the pressure wave generating device is controlled by a control unit.

The present invention has been described in connection with the preferred embodiments of the present invention in accordance with the accompanying drawings.

Referring to FIG. 2, a manifold fuel injection engine with a pressure wave device according to an embodiment of the present invention is mainly composed of a cylinder block 20, a piston 30, an intake manifold 40, and a fuel injector 50. A kit 60, and a pressure wave generating device 70, wherein:

The cylinder block 20 has a combustion chamber 21, and the combustion chamber 21 is provided with an intake valve 22, an exhaust valve 23, a spark plug 24, and an exhaust manifold 25, due to the foregoing components. The configuration of the group is the same as that of the general PFI engine, and is not related to the technical focus of the present application, and therefore will not be described herein.

The piston 30 is movably disposed within the combustion chamber 21 of the cylinder block 20.

The intake manifold 40 has an intake duct 41 communicating with the combustion chamber 21, and the duct wall 40 has a through hole 42 communicating with the intake duct 41.

The fuel injection nozzle 50 is disposed on the intake manifold 40, and the fuel injector 50 has an injection portion 51 disposed in the intake duct 41 of the intake manifold 40. The fuel injection portion 51 is Control is able to eject an atomized fuel.

The kit 60 is sleeved outside the fuel injector 50. The kit 60 has a space 61 communicating with the intake duct 41 of the intake manifold 40. The space 61 has a first port 611 and a The second port 612 is disposed on the outer tube wall of the intake manifold 40 and covers the through hole 42 of the intake manifold 40, so that the space 61 passes through the through hole 42 The intake ducts 41 are in communication.

The pressure wave generating device 70 is disposed at the second port 612 of the kit 60, and causes a space 61 of the kit 60 to generate a pressure wave transmitted to the intake duct 41 of the intake manifold 40, and the injector is provided. In the present embodiment, the pressure wave generating device 70 is composed of a coil 71, a strong magnet 72 disposed outside the coil 71, and a movable push provided on the coil 71. And a film 74 disposed on the second port 612 of the kit 60 and slidable by the pusher 73, and the coil 71 is controlled by a control unit 75 to form an electromagnetic field of the coil 71. .

The above description is the structure and configuration description of each main component of the embodiment of the present invention.

The mode of operation of the embodiment of the present invention is as follows:

Referring to FIG. 3, during the power output of the manifold fuel injection engine, the pressure wave generating device 70 can be controlled to be actuated by the control unit 75 while the fuel injector 50 is discharging the atomized fuel. The space 61 of the kit 60 generates a pressure wave 62 that is transmitted to the intake duct 41 of the intake manifold 40. At this time, the pressure wave 62 transmitted to the intake passage 41 will cause the fuel to be atomized to be smaller. In order to reduce the depth at which the mixture of the fuel atomization and the air is mixed and adhered to the inner wall of the intake valve 22 and the intake manifold 40, the present invention enables the fuel injection nozzle 50 to be atomized after the fuel is atomized. The effect is better, to achieve the purpose of extending the engine carbon formation time.

It should be noted that since the pressure wave generating device 70 is composed of the coil 71, the strong magnet 72, the pushing member 73, and the film 74, when the pressure wave generating device 70 receives the control signal of the control unit 75, The current flows through the coil 71 and forms an electromagnetic field. After interacting with the powerful magnet 72, the pushing member 73 generates a force, thereby pushing the film 74 to deform. After the film 74 is deformed, a vibration is generated, and the pressure is generated. The wave 62 is transmitted to the intake duct 41 of the intake manifold 40, and the fuel of the injector 50 is atomized to be smaller.

In the above, the embodiments and the drawings are only the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, that is, the equal changes and modifications made by the scope of the patent application of the present invention should be It is within the scope of the patent of the present invention.

"Knowledge"

11. . . Cylinder block

111. . . Fuel room

12. . . piston

13. . . Intake manifold

14. . . Exhaust manifold

15. . . Intake valve

16. . . Exhaust valve

17. . . Mars plug

18. . . Injector

181. . . Fuel injection department

"this invention"

20. . . Cylinder block

twenty one. . . Combustion chamber

twenty two. . . Intake valve

twenty three. . . Exhaust valve

twenty four. . . Mars plug

25. . . Exhaust manifold

30. . . piston

40. . . Intake manifold

41. . . Intake pipe

42. . . Through hole

50. . . Injector

51. . . Fuel injection department

60. . . Kit

61. . . space

611. . . First port

612. . . Second port

62. . . Pressure wave

70. . . Pressure wave generating device

71. . . Coil

72‧‧‧Powerful magnet

73‧‧‧ push

74‧‧‧film

75‧‧‧Control unit

Figure 1 is a schematic diagram of a conventional fuel injection engine.

Figure 2 is a schematic representation of the invention.

Figure 3 is a schematic view of the operation of the present invention.

20. . . Cylinder block

twenty one. . . Combustion chamber

twenty two. . . Intake valve

twenty three. . . Exhaust valve

twenty four. . . Mars plug

25. . . Exhaust manifold

30. . . piston

40. . . Intake manifold

41. . . Intake pipe

42. . . Through hole

50. . . Injector

51. . . Fuel injection department

60. . . Kit

61. . . space

611. . . First port

612. . . Second port

70. . . Pressure wave generating device

71. . . Coil

72. . . Strong magnet

73. . . Pusher

74. . . film

75. . . control unit

Claims (2)

A manifold fuel injection engine with a pressure wave device, comprising: a cylinder block having a combustion chamber, the combustion chamber being provided with a connecting intake valve, an exhaust valve, a spark plug, and a row a gas cylinder; a piston movably disposed in the combustion chamber of the cylinder block; an intake manifold having an intake duct communicating with the combustion chamber, the inlet manifold wall having a through hole; a fuel injection nozzle having a fuel injection portion disposed in an intake pipe of the intake manifold; a kit sleeved outside the fuel injector, the kit having a through hole and the inlet a space communicating with the air intake duct of the air duct, the space having a first port and a second port, the first port being disposed on the outer tube wall of the intake manifold and covering the intake manifold a through-hole; a pressure wave generating device disposed in the kit, and causing a pressure wave in the space of the kit to be transmitted to the intake duct of the intake manifold, so that the fuel of the injector is atomized Small, the pressure wave generating device is composed of a coil, a strong magnet disposed outside the coil, and a movable Push member provided in the coil and a second port and can be pushed to the pushing member provided on a film composed of the kit. The manifold fuel injection engine with a pressure wave device according to claim 1, wherein the coil of the pressure wave generating device is controlled by a control unit Controlled.