Common rail fuel supply system for fuel cell or multi-fuel engines

Abstract

The invention discloses a common rail fuel supply system for a fuel cell or a multi-fuel engine, which includes a fuel source and a fuel delivery pipeline, a valve, a pressure regulator and a common rail injection device are connected in series on the fuel delivery pipeline, and the common rail injection device It includes front and rear fuel rails and multiple injectors connected in parallel between the two fuel rails. The input ends of the injectors are all connected to the front fuel rails, and the injection ends of the injectors are all connected to the rear fuel rails. The invention can give full play to the advantages of the fuel cell system, effectively solve the pressure balance problem of the fuel cell stack, greatly improve the service life of the fuel cell stack; accurately and quickly control the fuel supply, improve the control accuracy and dynamic response speed; realize the fuel cell system 1. The fuel cell engine system has simple structure, low cost, long life, long-term stable and reliable operation, and is suitable for use in automobiles and other vehicles to meet the special needs of zero emissions, high power and fast dynamic response.

Description

technical field [0001] The invention relates to a fuel supply system for a fuel cell, in particular to a common rail fuel supply system for a fuel cell or a fuel cell engine or a multi-fuel engine. Background technique [0002] In the field of new energy technology, the core part of fuel cell system and fuel cell engine technology is the fuel cell stack. The fuel cell system is composed of a fuel cell stack, equipped with a fuel supply system, an air or oxygen supply system, a cooling water system, and a control system; a fuel cell engine is a fuel cell system applied to transportation equipment. [0003] Large fuel cell systems typically operate at high pressure or pressurization. The reason for operating fuel cells and fuel cell engine systems at higher pressures is that the exchange current density of fuel cell stacks increases under high pressure, which significantly increases the open circuit voltage of the battery and ultimately increases the output power of the fuel ...

AI Technical Summary

Problems solved by technology

[0004] In addition, the fuel (hydrogen) supply system or input circuit of fuel cell systems and fuel cell engines in the past is usually composed of components such as decompression buffer valves, solenoid valves, proportional control valves, and hydrogen return pumps. These components are mostly used in the chemical industry. , has defects such as high cost, limited temperature range, and slow response speed. The fuel cell system or fuel cell engine formed is not suitable for equipment or occasions with high dynamic response requirements, such as automotive applications.

[0005] Furthermore, due to the limitations of the design of the fuel supply system and components, the system cannot accurately control the fuel supply of the fuel cell system or the fuel cell engine

[0006] To sum up the defects mentioned above, when the existing fuel supply system is applied in some fields (for example, on automobiles), the fuel cell system or fuel cell engine system constituted is complicated, has low efficiency, and poor control accuracy, and it is difficult to ensure The pressure balance under environmental conditions will affect the service life of the system. More importantly, the dynamic response performance of the system is not good, and it cannot surpass the traditional engine to meet the actual application requirements.

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