Common-rail fuel supply system of fuel cell or multi-fuel engine

Abstract

The invention discloses a common-rail fuel supply system of fuel cells or multi-fuel engines, which comprises a fuel source and a fuel conveyer pipe; a valve, a pressure regulator, and a common-rail injection apparatus are serially connected on the fuel conveyer pipe; the common-rail injection apparatus comprises a front and a back fuel rails, and a plurality of injectors parallelly connected between the two fuel rails; input ends of the injectors are all connected with the front fuel rail, and injection ends of the injectors are all connected with the back fuel rail. The invention brings into full play of the advantages of a fuel cell system, effectively solves the problem of pressure balance of a fuel cell electric pile, and greatly improves the service life of the fuel cell electric pile; the invention precisely and rapidly controls the fuel supply amount, and increases the control precision and the dynamic response speed; the invention realizes a simple structure, low cost, a long service life, and long-lasting stable and reliable operation of a fuel cell system or a fuel cell engine system, is applicable to transportation means such as automobile and the like, and meets the special requirements of zero discharge, large 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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