Pressure stabilizer, a gas engine system and a gas pressure control method

Patent metadata

Field	Value
Publication number	US-11204003-B2
Application number	US-202017003144-A
Country	US
Kind code	B2
Filing date	Aug 26, 2020
Priority date	Nov 22, 2019
Publication date	Dec 21, 2021
Grant date	Dec 21, 2021

Abstract

The present disclosure relates to a pressure stabilizer, a gas engine system and a gas pressure control method. The pressure stabilizer includes: a housing, which comprises a gas intake chamber and a piston chamber, wherein a spacer is provided between the gas intake chamber and the piston chamber, and the spacer is provided with a spacer through hole; a piston, which is slidably disposed in the piston chamber and which is provided therein with a piston through hole passing through the piston; a spring disposed in the piston chamber, wherein the spring is disposed between the piston and the spacer; a gas outlet end cap, which is disposed at an open end of the piston chamber and which is provided with a gas outlet; and an electromagnetic coil, which is disposed at an end of the gas outlet end cap that is close to the piston, wherein the electromagnetic coil generates a magnetic field force for attracting the piston in an energized state, so as to attract the piston to approach the gas outlet end cap.

First claim

The invention claimed is:

1. A pressure stabilizer, comprising:
a housing, which comprises a gas intake chamber and a piston chamber, wherein a spacer is provided between the gas intake chamber and the piston chamber, and the spacer is provided with a spacer through hole;
a piston, which is slidably disposed in the piston chamber and which is provided therein with a piston through hole passing through the piston;
a spring disposed in the piston chamber, wherein the spring is disposed between the piston and the spacer;
a gas outlet end cap, which is disposed at an open end of the piston chamber and which is provided with a gas outlet; and
an electromagnetic coil, which is disposed at an end of the gas outlet end cap that is close to the piston, wherein the electromagnetic coil generates a magnetic field force for attracting the piston in an energized state, so as to control a displacement amount of the movement of the piston toward the gas outlet end cap by utilizing the magnetic field force of the electromagnetic coil, to increase the gas pressure at the gas outlet of the pressure stabilizer.

2. The pressure stabilizer according to claim 1 , wherein the electromagnetic coil is disposed in a circumferential direction of the gas outlet end cap.

3. The pressure stabilizer according to claim 1 , wherein the pressure stabilizer further comprises a blocking cap installed in the gas intake chamber, and a plurality of blocking cap through holes are provided in the blocking cap.

4. The pressure stabilizer according to claim 3 , wherein the gas outlet end cap is connected with the open end of the piston chamber by a thread.

5. The pressure stabilizer according to claim 1 , wherein a gas pressure balance hole is provided in the housing at the piston chamber.

6. The pressure stabilizer according to claim 3 , wherein the pressure stabilizer further comprises a gas inlet end cap, a gas inlet is provided on the gas inlet end cap, and the gas inlet communicates with the blocking cap through holes.

7. The pressure stabilizer according to claim 1 , wherein the piston comprises a piston head and a piston rod, the piston head is in sliding and sealing fit with the piston chamber, the piston rod is inserted into the spacer through hole, and the spring is sleeved over the piston rod.

8. The pressure stabilizer according to claim 7 , wherein an end of the piston head that abuts against the gas outlet end cap is provided with an adjustment chamber, the adjustment chamber is in communication with the piston through hole, and a diameter of the adjustment chamber is larger than a diameter of the piston through hole.

9. A gas engine system, comprising:
a gas intake pipe, which is configured to supply gas to a gas engine;
a mixer, an outlet of which is connected to the gas intake pipe;
a gas nozzle, an outlet of which is connected to a gas inlet of the mixer;
a pressure stabilizer, which is the pressure stabilizer according to claim 1 , wherein a gas outlet of the pressure stabilizer is connected to an inlet of the gas nozzle;
a first pressure sensor, which is disposed between the pressure stabilizer and the gas nozzle;
a second pressure sensor, which is disposed between the gas intake pipe and the mixer; and
an ECU, which is electrically connected to the first pressure sensor, the second pressure sensor, and an electromagnetic coil of the pressure stabilizer.

10. A gas pressure control method, which is applied to the gas engine system according to claim 9 , the gas pressure control method comprising:
obtaining a first pressure value of the first pressure sensor in real time;
obtaining a second pressure value of the second pressure sensor in real time;
calculating a ratio of the second pressure value to the first pressure value; and
controlling a magnetic field force of the electromagnetic coil to increase, according to a result that the ratio is larger than or equal to a preset value.

Assignees

• Weichai Power Co Ltd

Inventors

• Tan Xuguang
• Li Wang

Classifications

• F02D19/022

  to adjust the fuel pressure, temperature or composition · CPC title

• F02D2200/0406

  Intake manifold pressure · CPC title

• F02M21/0239 Primary

  Pressure or flow regulators therefor · CPC title

• F02D19/027

  Determining the fuel pressure, temperature or volume flow, the fuel tank fill level or a valve position · CPC title

• F02M21/0245

  High pressure fuel supply systems; Rails; Pumps; Arrangement of valves · CPC title