Fuel pressure control method of dual-fuel direct injection system engine
A fuel pressure and control method technology, applied in engine control, fuel injection control, combustion engine, etc., can solve the problems of large pressure fluctuations, high development costs, and slow response speed of dual fuel injection systems
Pending Publication Date: 2020-10-23
英嘉动力科技无锡有限公司
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Problems solved by technology
[0004] The main purpose of this application is to provide a fuel pressure control method for an engine with a dual-fuel direct injection system to solve the problems of the existing dual-fuel injection system, such as large pressure fluctuations, high development costs, and slow response speed
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[0030] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is an embodiment of a part of the application, but not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the scope of protection of this application.
[0031] It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It should be understood that the data so used may be interchanged under appropriate circumstances for...
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The invention discloses a fuel pressure control method of a dual-fuel direct injection system engine. The fuel pressure control method of the dual-fuel direct injection system engine comprises the following steps: liquid fuel is stored in an oil tank, gas fuel is stored in a liquefied gas bottle in a liquid form, the liquid fuel in the oil tank is conveyed to an oil supply pump, the oil supply pump pressurizes and transmits the liquid fuel to a fuel rail, and the fuel rail provides a high pressure oil source for a dual-fuel injector; and a low temperature pump is arranged in the liquefied gasbottle, the liquefied gas bottle pressurizes and vaporizes the liquified gas fuel to be gas, then, the gas fuel is conveyed to a buffer tank, the gas in the buffer tank is regulated by a pressure regulation valve and then transmitted into a gas rail, and the gas rail provides a high pressure gas fuel source for the dual-fuel injector. The liquefied gas bottle, the low temperature pump, the buffertank, the fuel rail and the gas rail are all internally provided with a pressure sensor, a temperature sensor is arranged in the gas rail, and a pressure signal and a temperature signal are transmitted to an electronic control unit. Product modules, such as a pressure increasing valve, a pressure release valve, a reversing valve, the pressure regulation valve, the dual-fuel injector and the oil supply pump, all contain an electronic control element, the electronic control unit sends a control signal to the electronic control unit so as to control a product containing the electronic control element and further regulate and control pressure in each module product.
Description
technical field [0001] The invention relates to the technical field of engine combustion, in particular to a method for controlling fuel pressure of an engine with a dual-fuel direct injection system. Background technique [0002] With the gradual upgrading of emission standards, it is increasingly difficult for traditional internal combustion engines that use gasoline and diesel as combustion media to meet the requirements of future combustion technologies. With the adjustment of the national energy structure, the available internal combustion engine fuels are gradually diversified, including natural gas, liquefied petroleum gas, methanol and many other clean fuels. The internal combustion engine with diesel as the medium is combusted by compression ignition, which has many advantages such as high compression ratio, high thermal efficiency, high torque output, etc. The self-ignition temperature of clean fuels such as natural gas, liquefied petroleum gas, and methanol is sig...
Claims
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IPC IPC(8): F02D41/00F02D41/38F02D41/40F02M21/02F02M21/06
CPCF02D41/0025F02D41/3863F02D41/401F02M21/0218F02M21/0221F02M21/0239F02M21/0242F02M21/0245F02M21/06F02M21/0293F02D2041/389Y02T10/30
Inventor 张建明姬广存
Owner 英嘉动力科技无锡有限公司