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Vehicle, gasoline and diesel dual-fuel engine and fuel injection method thereof

A dual-fuel engine, gasoline and diesel technology, applied in the field of vehicles, can solve the problems of insufficient exhaust energy at low speeds, low efficiency of superchargers, poor emissions, etc., and achieve the effects of improving low-speed external characteristics, fast combustion rate, and low fuel consumption

Active Publication Date: 2017-03-15
GREAT WALL MOTOR CO LTD
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Problems solved by technology

[0002] In the related technology, the way to improve the low-speed external characteristics of the diesel engine is to re-match the supercharger, sacrificing the power and torque in the high-speed area, and the diesel engine adopts the main pre-injection double injection mode, and the low-speed exhaust energy is insufficient, resulting in low efficiency of the supercharger. High fuel consumption and poor emissions, room for improvement

Method used

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  • Vehicle, gasoline and diesel dual-fuel engine and fuel injection method thereof
  • Vehicle, gasoline and diesel dual-fuel engine and fuel injection method thereof
  • Vehicle, gasoline and diesel dual-fuel engine and fuel injection method thereof

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Embodiment Construction

[0042] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0043] The following will refer to the attached Figure 1-Figure 5 The present invention will be described in detail in combination with examples. Each working cycle of a gasoline and diesel dual-fuel engine includes an intake stroke, a compression stroke, a power stroke and an exhaust stroke.

[0044] Such as figure 1 As shown, the fuel injection method of the gasoline and diesel dual fuel engine according to the embodiment of the present invention comprises the following steps:

[0045] In the compression stroke, the pre-injection diesel oil 1 of the first predetermined fuel injection amount D1 is injected into the cylinder, and then the main injection gasoline 2 of the second predetermined fuel injection amount G1 is injected into the cylinder before the power stroke, and then in the working stroke In ...

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Abstract

The invention provides a vehicle, a gasoline and diesel dual-fuel engine and a fuel injection method thereof. Each working cycle comprises an intake stroke, a compression stroke, a working stroke and an exhaust stroke. The fuel injection method comprises the following steps of injecting a first predetermined fuel injection quantity D1 of pilot injection diesel into a cylinder in the compression stroke; next injecting a second predetermined fuel injection quantity G1 of main injection gasoline into the cylinder before the working stroke; then injecting a third predetermined fuel injection quantity D2 of main injection diesel into the cylinder in the working stroke; injecting a fourth predetermined fuel injection quantity G2 of post-injection gasoline into the cylinder after the injection of the main injection diesel and before the exhaust stroke, wherein D1 is smaller than D2, G1 is greater than or equal to G2, and G1 is smaller than D2. According to the gasoline and diesel dual-fuel engine and the fuel injection method thereof, the low-speed external characteristic of the engine is improved while the power and the torque of a high-speed region are not scarified.

Description

technical field [0001] The invention relates to the technical field of engines, in particular to a fuel injection method for a gasoline and diesel dual fuel engine, a gasoline and diesel dual fuel engine and a vehicle with the gasoline and diesel dual fuel engine. Background technique [0002] In the related technology, the way to improve the low-speed external characteristics of the diesel engine is to re-match the supercharger, sacrificing the power and torque in the high-speed area, and the diesel engine adopts the main pre-injection double injection mode, and the low-speed exhaust energy is insufficient, resulting in low efficiency of the supercharger. High fuel consumption and poor emissions, there is room for improvement. Contents of the invention [0003] In view of this, the present invention aims to propose a fuel injection method for a gasoline and diesel dual-fuel engine, so as to improve the low-speed external characteristics of the engine without sacrificing t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D19/08F02D19/06F02M43/04
CPCY02T10/30
Inventor 史晓刚王超赵中芹康志强刘晓娜高嵩
Owner GREAT WALL MOTOR CO LTD
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