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Noise Reduction Method and Device for In-Cylinder Direct Injection Fuel Engine and Its High Pressure Oil Pump

A technology of in-cylinder direct injection and high-pressure oil pump, which is applied in the direction of fuel injection device, fuel injection pump, charging system, etc. It can solve the problems of difficult sound insulation and high noise of the whole vehicle, so as to reduce working noise, reduce noise and prolong the service life The effect of longevity

Active Publication Date: 2018-09-11
BYD CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, although the current control of the high-pressure oil pump can realize the adjustment function of oil pressure, the noise of the high-pressure oil pump is very loud when it is working, even exceeding the noise of the engine, which brings difficulties to the sound insulation of the whole vehicle

Method used

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  • Noise Reduction Method and Device for In-Cylinder Direct Injection Fuel Engine and Its High Pressure Oil Pump
  • Noise Reduction Method and Device for In-Cylinder Direct Injection Fuel Engine and Its High Pressure Oil Pump
  • Noise Reduction Method and Device for In-Cylinder Direct Injection Fuel Engine and Its High Pressure Oil Pump

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Embodiment Construction

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0028] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Of course, they are only examples and are not intended to limit the invention. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicat...

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Abstract

The invention discloses a noise reduction method of a high-pressure oil pump of a gasoline direct injection engine. The noise reduction method comprises the steps of calculating a maximum permissible working current and a minimum permissible working current of a fuel pressure regulating valve of the high-pressure oil pump at the magnetization stage; detecting the magnetization current of the fuel pressure regulating valve at the magnetization stage in real time; and enabling the magnetization current to change between the maximum permissible working current and the minimum permissible working current through controlling the energization and deenergization states of the fuel pressure regulating valve till the magnetization stage is over. According to the noise reduction method of the high-pressure oil pump of the gasoline direct injection engine, the working noise of the high-pressure oil pump can be reduced on the precondition that the operation of the high-pressure oil pump is not influenced, and the service life of the fuel pressure regulating valve can be prolonged. The invention further discloses a noise reduction device of the high-pressure oil pump of the gasoline direct injection engine, and the gasoline direct injection engine provided with the noise reduction device.

Description

technical field [0001] The invention relates to the technical field of fuel engines, in particular to a noise reduction method for a high-pressure oil pump of an in-cylinder direct injection fuel engine, a noise reduction device for a high-pressure oil pump of an in-cylinder direct injection fuel engine, and an in-cylinder engine with the noise reduction device. Direct injection fuel engine. Background technique [0002] At present, the direct injection fuel engine in the cylinder contains a high-pressure fuel system, such as figure 1 As shown, in the high-pressure fuel system, the high-pressure fuel pump is used to adjust the fuel pressure required by the system. In the control of the high-pressure oil pump, the oil pressure is mainly adjusted by controlling the fuel pressure regulating valve inside the high-pressure oil pump, and the fuel pump in the low-pressure oil circuit is injected into the high-pressure oil circuit for fuel supply. figure 2 shown. [0003] The co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02M59/46
Inventor 吕丹丹何智广
Owner BYD CO LTD
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