CN-121993328-A - Dual fuel supply system, engine and mechanical equipment

CN121993328ACN 121993328 ACN121993328 ACN 121993328ACN-121993328-A

Abstract

The application discloses a dual-fuel supply system, an engine and mechanical equipment, which relate to the technical field of engines and comprise a first fuel delivery module, a second fuel delivery module, a dual-fuel high-pressure oil pump module, a dual-fuel high-pressure oil rail module, a dual-fuel direct injection module, a dual-fuel supply controller and a dual-fuel supply controller, wherein the first end of the dual-fuel high-pressure oil pump module is respectively connected with the first end of the first fuel delivery module, the second end of the second fuel delivery module is respectively connected with the first end of the first fuel delivery module, the third end of the dual-fuel high-pressure oil rail module is respectively connected with the second end of the first fuel delivery module, the first end of the first fuel high-pressure oil rail module is connected with the second end of the second fuel delivery module, the third end of the first fuel high-pressure oil rail module is respectively connected with the second end of the first fuel delivery module, the third end of the first fuel high-pressure oil rail module is connected with the second end of the second fuel high-pressure oil pump module, the third end of the first fuel high-pressure oil rail module is connected with the second end of the first fuel high-pressure oil rail module, and the third end of the dual-fuel direct injection module is used for supplying first fuel and/second fuel. The application reduces the implementation cost of the dual fuel supply system.

Inventors

Tao Lemin
PENG YONGWEN
LEI XIAOFENG
ZHENG DEYUAN

Assignees

浙江吉利控股集团有限公司
浙江远程新能源商用车集团有限公司
浙江醇氢研究开发有限公司

Dates

Publication Date: 20260508
Application Date: 20260129
Priority Date: 20250514

Claims (12)

1. A dual fuel supply system, the dual fuel supply system comprising: A first fuel delivery module and a second fuel delivery module; the first end of the dual-fuel high-pressure oil pump module is respectively connected with the first end of the first fuel conveying module and the first end of the second fuel conveying module, and the third end of the dual-fuel high-pressure oil pump module is respectively connected with the second end of the first fuel conveying module and the second end of the second fuel conveying module; The first end of the dual-fuel high-pressure oil rail module is connected with the second end of the dual-fuel high-pressure oil pump module, and the third end of the dual-fuel high-pressure oil rail module is respectively connected with the second end of the first fuel conveying module and the second end of the second fuel conveying module; The first end of the dual-fuel direct injection module is connected with the second end of the dual-fuel high-pressure oil rail module, and the second end of the dual-fuel direct injection module is connected with the second end of the first fuel conveying module; The dual-fuel supply controller is connected with the fourth end of the dual-fuel high-pressure oil pump module, the fourth end of the dual-fuel high-pressure oil rail module and the third end of the dual-fuel direct injection module, and is used for collecting rail pressure information of the dual-fuel high-pressure oil rail module and controlling the dual-fuel high-pressure oil pump module based on the rail pressure information so that the first fuel delivery module supplies first fuel and/or the second fuel delivery module supplies second fuel.
2. The dual fuel supply system of claim 1 wherein the dual fuel supply controller includes a first direct injection control end and a second direct injection control end, the second end of the dual fuel high pressure rail module including a first fuel rail output and a second fuel rail output, the dual fuel direct injection module comprising: The high-pressure oil Guan Zhuaijie device is characterized in that a switching input port of the high-pressure oil pipe switching device is connected with the first fuel oil rail output port through an oil outlet pipe; The first direct injection fuel injector is characterized in that a first direct injection input port of the first direct injection fuel injector is connected with a first transfer output port of the high-pressure fuel pipe adapter through an oil outlet pipe, the first direct injection output port of the first direct injection fuel injector is connected with a second end of the first fuel conveying module through an oil return pipe, and a first control valve on the first direct injection fuel injector is connected with the first direct injection control end through a control line; The second direct injection fuel injector, the second direct injection input port of the second direct injection fuel injector is connected with the second switching output port of the high-pressure fuel pipe adapter through an oil outlet pipe, the third direct injection input port of the second direct injection fuel injector is connected with the second fuel rail output port through an oil outlet pipe, the second direct injection output port of the second direct injection fuel injector is connected with the second end of the first fuel conveying module through an oil return pipe, and a second control valve on the second direct injection fuel injector is connected with the second direct injection control end through a control line.
3. The dual fuel supply system of claim 1 wherein the dual fuel supply controller includes an integrated direct injection control end, the second end of the dual fuel high pressure rail module including a first fuel rail output and a second fuel rail output, the dual fuel direct injection module comprising: The integrated direct injection fuel injector comprises a first direct injection input port and a first fuel oil rail output port, wherein the first direct injection input port and the first fuel oil rail output port of the integrated direct injection fuel injector are connected through an oil outlet pipe, a second direct injection input port and the second fuel oil rail output port of the integrated direct injection fuel injector are connected through an oil outlet pipe, the first direct injection output port of the integrated direct injection fuel injector is connected with the second end of the first fuel delivery module through an oil return pipe, an integrated control valve on the integrated direct injection fuel injector is connected with the integrated direct injection control end through a control line, the injection of first fuel and second fuel can be independently controlled by the integrated control valve, and an oil injection outlet of the integrated direct injection fuel injector is arranged at the center position of a combustion chamber.
4. The dual fuel supply system of claim 3, wherein a first needle valve and a second needle valve are coaxially disposed within the integrated direct injection injector, the first needle valve disposed inboard of the second needle valve, wherein the first needle valve is configured to control the first fuel injection and the second needle valve is configured to control the second fuel injection.
5. The dual fuel supply system of claim 2, wherein the dual fuel supply controller includes a first rail pressure acquisition end, the second end of the dual fuel high pressure oil pump module includes a first oil pump output, the dual fuel high pressure oil rail module includes: The first fuel oil rail is connected with the first oil rail input port and the first oil pump output port through oil outlet pipes, the first oil rail output port of the first fuel oil rail is connected with the second end of the first fuel delivery module through oil return pipes, and the second oil rail output port of the first fuel oil rail is used as the first fuel oil rail output port; the first rail pressure sensor is arranged on the first fuel oil rail and is connected with the first rail pressure acquisition end through a communication line; And the mechanical pressure limiting valve is arranged at the first oil rail output port.
6. The dual fuel supply system of claim 2, wherein the dual fuel supply controller includes a second rail pressure acquisition end and a first pressure control end, the second end of the dual fuel high pressure oil pump module includes a second oil pump output, the dual fuel high pressure oil rail module includes: the second fuel oil rail is connected with the second oil rail input port and the second oil pump output port through oil outlet pipes, the third oil rail output port of the second fuel oil rail is connected with the second end of the second fuel delivery module through oil return pipes, and the fourth oil rail output port of the second fuel oil rail is used as the second fuel oil rail output port; The second rail pressure sensor is arranged on the second fuel oil rail, and the second rail pressure sensor is connected with the second rail pressure acquisition end through a communication line; the first pressure control valve is arranged at the third oil rail output port and is connected with the first pressure control end through a control line.
7. The dual fuel supply system of claim 2 wherein the dual fuel supply controller includes a first metering control end and a second metering control end, the dual fuel high pressure oil pump module comprising: The first oil pump output port of the dual-fuel high-pressure oil pump is used as the first oil pump output port of the dual-fuel high-pressure oil pump module, the third oil pump output port of the dual-fuel high-pressure oil pump is connected with the first end of the first fuel delivery module through an oil return pipe, and the fourth oil pump output port of the dual-fuel high-pressure oil pump is connected with the first end of the second fuel delivery module through an oil return pipe; the first metering device is arranged at the first oil pump input port and is connected with the first metering control end through a control line; the second metering device is arranged at the second oil pump input port and is connected with the second metering control end through a control line.
8. The dual fuel supply system of claim 7 wherein the first fuel delivery module comprises: the first oil return port of the first fuel tank is connected with the third oil pump output port, the first oil rail output port in the dual-fuel high-pressure oil rail module and the first direct injection output port in the dual-fuel direct injection module through an oil return pipe; the first coarse filter is connected with a first oil outlet of the first fuel tank through an oil outlet pipe; the first oil delivery inlet of the first oil delivery pump is connected with the first rough filtering outlet of the first rough filter through an oil outlet pipe; the oil pump comprises a first fine filter, wherein a first fine filter inlet of the first fine filter is connected with a first oil delivery outlet of a first oil delivery pump through an oil outlet pipe, and the first fine filter outlet of the first fine filter is connected with an input port of the first oil pump through the oil outlet pipe.
9. The dual fuel supply system of claim 7 wherein the second fuel delivery module comprises: The second oil return port of the second fuel tank is connected with the fourth oil pump output port and a fourth oil rail output port in the dual-fuel high-pressure oil rail module through an oil return pipe; The second coarse filter is connected with a second oil outlet of the second fuel tank through an oil outlet pipe; the second oil delivery inlet of the second oil delivery pump is connected with the second rough filtering outlet of the second rough filter through an oil outlet pipe; The second fine filter is characterized in that a second fine filter inlet of the second fine filter is connected with a second oil delivery outlet of the second oil delivery pump through an oil outlet pipe, and a second fine filter outlet of the second fine filter is connected with an input port of the second oil pump through an oil outlet pipe.
10. A dual fuel supply system as claimed in any one of claims 1 to 9 wherein a first pressure control valve in the dual fuel high pressure rail module is controlled to vent the second fuel in the event that a rail pressure differential between a first rail pressure value in the rail pressure information and a second rail pressure value in the rail pressure information is less than a preset rail pressure differential threshold.
11. An engine comprising a dual fuel supply system as claimed in any one of claims 1 to 10.
12. A mechanical device is characterized in that, the mechanical device comprising the engine of claim 11.

Description

Dual fuel supply system, engine and mechanical equipment Statement regarding priority citations the present application claims to submit to the national intellectual property agency of the people's republic of China at day 14 of 2025, application number 202510620983.7, entitled "Dual Fuel supply System, engine and vehicle," the contents of which are incorporated herein by reference in their entirety. Technical Field The application relates to the technical field of engines, in particular to a dual-fuel supply system, an engine and mechanical equipment. Background With the continuous development of engines, users have also put higher demands on the structural design of the fuel supply in the engine, especially the structural design of the dual fuel supply system. The structural design mode of the traditional dual-fuel supply system is a system with independent supply of two fuels, and has certain defects, namely the phenomenon that two independent supply systems are needed to be used is caused, namely the new dual-fuel supply system has high realization cost because the two independent supply systems are needed to be used. The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present application and is not intended to represent an admission that the foregoing is prior art. Disclosure of Invention The application mainly aims to provide a dual-fuel supply system, an engine and mechanical equipment, and aims to solve the technical problem of high implementation cost of the dual-fuel supply system. To achieve the above object, the present application provides a dual fuel supply system including: A first fuel delivery module and a second fuel delivery module; the first end of the dual-fuel high-pressure oil pump module is respectively connected with the first end of the first fuel conveying module and the first end of the second fuel conveying module, and the third end of the dual-fuel high-pressure oil pump module is respectively connected with the second end of the first fuel conveying module and the second end of the second fuel conveying module; The first end of the dual-fuel high-pressure oil rail module is connected with the second end of the dual-fuel high-pressure oil pump module, and the third end of the dual-fuel high-pressure oil rail module is respectively connected with the second end of the first fuel conveying module and the second end of the second fuel conveying module; The first end of the dual-fuel direct injection module is connected with the second end of the dual-fuel high-pressure oil rail module, and the second end of the dual-fuel direct injection module is connected with the second end of the first fuel conveying module; The dual-fuel supply controller is connected with the fourth end of the dual-fuel high-pressure oil pump module, the fourth end of the dual-fuel high-pressure oil rail module and the third end of the dual-fuel direct injection module, and is used for collecting rail pressure information of the dual-fuel high-pressure oil rail module and controlling the dual-fuel high-pressure oil pump module based on the rail pressure information so that the first fuel delivery module supplies first fuel and/or the second fuel delivery module supplies second fuel. In an embodiment, the dual fuel supply controller includes a first direct injection control end and a second direct injection control end, the second end of the dual fuel high pressure rail module includes a first fuel rail output and a second fuel rail output, the dual fuel direct injection module includes: The high-pressure oil Guan Zhuaijie device is characterized in that a switching input port of the high-pressure oil pipe switching device is connected with the first fuel oil rail output port through an oil outlet pipe; The first direct injection fuel injector is characterized in that a first direct injection input port of the first direct injection fuel injector is connected with a first transfer output port of the high-pressure fuel pipe adapter through an oil outlet pipe, the first direct injection output port of the first direct injection fuel injector is connected with a second end of the first fuel conveying module through an oil return pipe, and a first control valve on the first direct injection fuel injector is connected with the first direct injection control end through a control line; The second direct injection fuel injector, the second direct injection input port of the second direct injection fuel injector is connected with the second switching output port of the high-pressure fuel pipe adapter through an oil outlet pipe, the third direct injection input port of the second direct injection fuel injector is connected with the second fuel rail output port through an oil outlet pipe, the second direct injection output port of the second direct injection fuel injector is connected with the second end of the first fuel conveying module through an oil retur