Control system and method for dual-fuel engine
A dual-fuel engine and control method technology, applied in the direction of engine control, combustion engine, fuel injection control, etc., can solve the problems of technical implementation difficulties, increase hardware equipment, and restrictions on the wide application of dual-fuel engines, so as to achieve convenient technical implementation and realize Low cost, favorable effect for wide application
Inactive Publication Date: 2020-05-08
JIANGSU UNIV
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[0006] However, the above two methods have their own limitations, and additional hardware equipment is required or the technology itself is difficult to implement. As a result, the wide application of dual-fuel engines is limited.
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[0023] The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and embodiments, but the protection scope of the present invention is not limited thereto.
[0024] The term that needs to be explained in the present invention is defined as: the replacement ratio refers to the percentage of the original engine fuel injection amount that is replaced by the replacement fuel injection amount under the dual fuel under the condition of ensuring the engine power; the replacement ratio refers to the condition of ensuring the engine power. , how many copies of the replacement fuel injection quantity correspond to each replaced original engine fuel injection quantity.
[0025] like figure 1 As shown, a dual-fuel engine control system includes sensors, controllers and actuators, the sensors include a crankshaft sensor, a camshaft sensor, a cooling water temperature sensor, an intake pressure temperature sensor and an ac...
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The invention provides a control system and method for a dual-fuel engine. The control system comprises an original engine ECU and a dual-fuel ECU; under different working conditions, the dual-fuel ECU calculates current substitution rate, substitution ratio and single fuel theoretical original engine fuel injection quantity so as to obtain a theoretical original engine fuel injection quantity andan alternative fuel injection quantity; an alternative fuel injector is controlled by the alternative fuel injection quantity; the dual-fuel ECU obtains a virtual throttle signal from the theoreticaloriginal engine fuel injection quantity, transmits the virtual throttle signal to the original engine ECU, and then controls the original engine fuel injector. According to the control system and method for the dual-fuel engine, the dual-fuel substitution ratio can be adjusted flexibly; and moreover, a dual-fuel engine system is not required to be transformed, and the cost is low, which is beneficial to popularizing the dual-fuel engine.
Description
technical field [0001] The invention belongs to the technical field of automobile engines, and in particular relates to a control system and method of a dual-fuel engine. Background technique [0002] An important source of fuel for internal combustion engines is oil. In recent years, my country's car ownership has continued to grow rapidly, while oil consumption has steadily increased. Faced with the increasingly severe oil problem, finding suitable alternative energy sources for cars is an important means to ensure the healthy development of my country's auto industry. . At the same time, the emission regulations of internal combustion engines are gradually stricter, and gradually enter the sixth stage of the country, which is currently the most stringent regulations in the world. Finding an alternative fuel that improves the emissions performance of internal combustion engines is an effective means of coping with tougher regulations. With the development of technology, m...
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IPC IPC(8): F02D19/06F02D41/30
CPCF02D41/0025F02D41/30F02D2250/16Y02T10/30
Inventor 李捷辉房晟段畅贾奎
Owner JIANGSU UNIV