Device and method for realizing flash-boiling spraying by utilizing oil rail heating
A heating device and oil rail technology, which is applied to fuel injection devices, special fuel injection devices, and fuel heat treatment devices, etc. Complexity and other issues, to achieve the effect of low cost, easy control and the best effect
Active Publication Date: 2021-08-10
SHANGHAI JIAO TONG UNIV
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Problems solved by technology
However, the thermal management measures using the water jacket for heating can achieve flash boiling spray in some extreme cases, but due to changes in working conditions, the back pressure will change accordingly, and the degree of flash boiling will decrease until flash boiling cannot be achieved gradually, and the entire flash spray The atomization form of boiling spray is restricted by the temperature of cooling water (up to 90-110°C), which reduces the applicable operating conditions of flashing spray
In addition, using the fuel injector to heat the fuel requires redesigning the fuel injector and increasing the complexity of the fuel injector, which greatly increases the cost of the fuel system. In addition, it is impossible to control multiple cylinders at the same time, and the failure rate and control strategy will decrease. more complicated
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[0025] The following describes several preferred embodiments of the present invention with reference to the accompanying drawings, so as to make the technical content clearer and easier to understand. The present invention can be embodied in many different forms of embodiments, and the protection scope of the present invention is not limited to the embodiments mentioned herein.
[0026] In the drawings, components with the same structure are denoted by the same numerals, and components with similar structures or functions are denoted by similar numerals. The size and thickness of each component shown in the drawings are shown arbitrarily, and the present invention does not limit the size and thickness of each component. In order to make the illustration clearer, the thickness of parts is appropriately exaggerated in some places in the drawings.
[0027] Such as figure 1 As shown, the present invention realizes the heating function of the oil rail by modifying the structure o...
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The invention discloses a device and method for achieving flash boiling spraying by oil rail heating, and relates to the field of engine fuel atomization. The device is characterized by comprising an oil rail, a heating device, an oil rail sensor and a control module, wherein the oil rail sensor is used for monitoring the temperature and pressure of fuel in the oil rail in real time; and the control module is used for receiving temperature and pressure data sent by the oil rail sensor and controlling the power of the heating device. Fuel oil is heated from the oil rail level by modifying an existing oil rail, the temperature and pressure sensor is matched, and the oil temperature is controlled in real time according to the working condition, so that the temperature is proper and the flash boiling effect is optimal, the influence on whole machine assembly is small, the cost is low, oil rail unified heating is safe and reliable, the failure rate is low, and temperature distribution is uniform, and thus, a multi-cylinder engine has no combustion difference and is easy to control.
Description
technical field [0001] The invention relates to the field of engine fuel atomization, in particular to a device and method for realizing flashing spray by using fuel rail heating. Background technique [0002] In the design process of the core combustion system of the engine, fuel atomization is the core technology to achieve clean and efficient combustion. Realizing high-efficiency fuel atomization to better mix fuel and air into a homogeneous gas is the key to energy saving and emission reduction of the combustion system. At present, the main technical method for fuel atomization is high-pressure injection, that is, to increase the fuel rail pressure, and use the pressure difference between fuel and back pressure to carry out broken atomization. Studies have shown that properly raising the fuel temperature to achieve fuel flash spray can significantly improve the fuel atomization and evaporation effects under low fuel injection pressure conditions, and achieve the purpose ...
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IPC IPC(8): F02M55/02F02M31/125
CPCF02M55/02F02M31/125F02M2200/247F02M2200/248Y02T10/30Y02T10/12
Inventor 许敏孙哲袁志远王鸿雨王森徐宏昌崔明利李雪松
Owner SHANGHAI JIAO TONG UNIV