Fuel supply system for active pre-combustor

Patent metadata

Field	Value
Publication number	US-11788458-B2
Application number	US-202017756708-A
Country	US
Kind code	B2
Filing date	Dec 28, 2020
Priority date	Oct 20, 2020
Publication date	Oct 17, 2023
Grant date	Oct 17, 2023

Abstract

A fuel supply system for an active pre-combustor, including a cylinder assembly. The cylinder assembly comprises a cylinder head, a cylinder body, and a piston. The cylinder head, the cylinder body and the piston form a main combustor. The fuel supply system for the active precombustor further includes a precombustion chamber assembly and a plunger air pump assembly. The pre-combustor assembly is communicated with the main combustor. The plunger air pump assembly is communicated with the pre-combustor assembly. The plunger air pump assembly can actively mix air with fuel into a mixed fuel and deliver it into the pre-combustor assembly (20). The fuel supply system for the active pre-combustor supplies the mixed fuel to the pre-combustor on the basis of a reciprocating stroke opposite to the piston by adding the plunger air pump assembly on the pre-combustor assembly, and is safe, reliable, and efficient.

First claim

What is claimed is:

1. A fuel supply system for an active pre-combustor, comprising:
a main combustor, comprising:
a cylinder head;
a cylinder body; and
a piston;

a pre-combustor assembly; and
a plunger air pump assembly;
wherein the pre-combustor assembly is communicated with the main combustor, and the plunger air pump assembly is communicated with the pre-combustor assembly, and wherein the plunger air pump assembly is capable of mixing air and fuel into mixed fuel and delivering the mixed fuel to the pre-combustor assembly;
wherein the plunger air pump assembly comprises a plunger air pump driver, a plunger air pump rod and a plunger air pump spring, wherein the plunger air pump driver is configured to drive the plunger air pump rod, and the plunger air pump spring is wound on the plunger air pump rod, so that the plunger air pump rod is capable of sliding up and down in a plunger air pump cavity under a driving of the plunger air pump driver;
wherein the plunger air pump assembly further comprises a fuel supply pipeline assembly, which is communicated with an engine and the plunger air pump cavity, wherein the fuel supply pipeline assembly comprises a plunger air pump pipeline intake pipe, an air compression device and a gasification mixing device, wherein an inlet end of the plunger air pump pipeline intake pipe is arranged between an engine air filter and an engine intake pipe, and the air compression device and the gasification mixing device are communicated with the plunger air pump pipeline intake pipe through pipelines.

2. The fuel supply system for the active pre-combustor of claim 1 , wherein the pre-combustor assembly comprises a spark plug and a pre-combustor housing, wherein the spark plug is fixed on the pre-combustor housing, and the spark plug is capable of igniting the mixed fuel in the pre-combustor housing, and wherein the pre-combustor housing is provided with pre-combustor injection holes, and the pre-combustor assembly is communicated with the main combustor through the pre-combustor injection holes.

3. The fuel supply system for the active pre-combustor of claim 2 , wherein the pre-combustor housing is communicated with the plunger air pump cavity.

4. The fuel supply system for the active pre-combustor of claim 3 , wherein the plunger air pump rod is capable of controlling the plunger air pump cavity to be communicated with or separated from the pre-combustor cavity.

5. The fuel supply system for the active pre-combustor of claim 2 , wherein the pre-combustor housing is further provided with a first contact surface and a second contact surface, wherein the first contact surface contacts a lower end of the plunger air pump spring and limits the plunger air pump spring, and the second contact surface contacts a lower end of the plunger air pump rod and limits the plunger air pump rod.

6. The fuel supply system for the active pre-combustor of claim 1 , wherein when the fuel supply system for the active pre-combustor is used for a gasoline engine, a diameter of the plunger air pump cavity is in a range of 1-40 mm, and a stroke of the plunger air pump rod is in a range of 1-40 mm, wherein when the fuel supply system for the active pre-combustor is used for a diesel engine, the diameter of the plunger air pump cavity is in a range of 10-500 mm, and the stroke of the plunger air pump air rod is in a range of 5-500 mm.

7. The fuel supply system for the active pre-combustor of claim 1 , wherein the fuel supply pipeline assembly further comprises a plunger air pump intake pipe, wherein the fuel supply pipeline assembly is communicated with the plunger air pump assembly through the plunger air pump intake pipe, and the plunger air pump intake pipe is communicated with an outlet end of the plunger air pump pipeline intake pipe.

8. The fuel supply system for the active pre-combustor of claim 1 , wherein a ratio of a frequency at which the plunger air pump driver drives the plunger air pump rod and a frequency at which the piston drives an engine crankshaft is 1:2.

9. The fuel supply system for the active pre-combustor of claim 1 , wherein a ratio of a frequency at which the plunger air pump driver drives the plunger air pump rod and a frequency at which the piston drives an engine crankshaft is 1:1 or 2:1.

10. The fuel supply system for the active pre-combustor of claim 1 , wherein the plunger air pump rod further comprises a plunger air pump piston, wherein the plunger air pump piston is fixedly connected to a bottom end of the plunger air pump rod and is directly driven by plunger air pump rod, which is capable of sliding up and down in the plunger air pump cavity under the driving of the plunger air pump driver and a driving of the plunger air pump spring.

11. The fuel supply system for the active pre-combustor of claim 2 , wherein the pre-combustor injection holes are arranged at a bottom of the pre-combustor housing, and the plurality of pre-combustor injection holes are evenly arranged along an axis of the pre-combustor housing; the spark plug is arranged on one side of a top of the pre-combustor housing, and the plunger air pump assembly is arranged on the other side of the top of the pre-combustor housing.

12. The fuel supply system for the active pre-combustor of claim 5 , wherein the first contact surface is provided on an outer wall of the pre-combustor housing, and the second contact surface is provided on a step of an inner wall of the pre-combustor housing.

13. The fuel supply system for the active pre-combustor of claim 1 , wherein an inlet end of the plunger air pump pipeline air intake pipe is arranged behind the engine air filter.

14. The fuel supply system for the active pre-combustor of claim 1 , wherein the air compression device is an electric plunger pump or a Roots pump.

15. The fuel supply system for the active pre-combustor of claim 1 , wherein a heating method of the gasification mixing device is an electric heating method.

16. The fuel supply system for the active pre-combustor of claim 1 , wherein a compression ratio of the air compression device is in a range of 1.5-2.5, and an excess air coefficient of the mixed fuel prepared by the gasification mixing device is in a range of 0.6-2.2.

Assignees

• Guangzhou Automobile Group Co

Inventors

• Wu Jian
• Wei Jingsi
• Wu Shan
• Xu Hanjun
• Ma Guixiang
• Liu Mingjia

Classifications

• F02B19/109 Primary

  with injection of a fuel-air mixture into the pre-combustion chamber by means of a pump, e.g. two-cycle engines · CPC title

• F02B19/06

  with auxiliary piston in chamber for transferring ignited charge to cylinder space · CPC title

• F02B19/12

  with positive ignition (engines with non-timed positive ignition, and with incandescent chambers F02B9/08) · CPC title

• F02B19/16

  Chamber shapes or constructions not specific to sub-groups F02B19/02 - F02B19/10 · CPC title

• F02M29/00

  Apparatus for re-atomising condensed fuel or homogenising fuel-air mixture (combined with secondary-air supply F02M23/12 {; collecting condensed fuel F02M33/02}) · CPC title