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Vehicle fuel injection quantity control method, device and vehicle

A control method and control device technology, applied in fuel injection control, electrical control, engine control, etc., can solve the problems of reducing the control accuracy of gasoline engines, not being able to effectively reduce engine fuel consumption, and being unable to accurately control fuel injection, etc., to achieve precise control The effect of fuel injection volume, reducing engine fuel consumption and improving control accuracy

Active Publication Date: 2020-05-08
GREAT WALL MOTOR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in the related art, it is impossible to precisely control the fuel injection, which reduces the precision of the gasoline engine control, and cannot effectively reduce the fuel consumption of the engine.

Method used

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  • Vehicle fuel injection quantity control method, device and vehicle
  • Vehicle fuel injection quantity control method, device and vehicle
  • Vehicle fuel injection quantity control method, device and vehicle

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Embodiment Construction

[0033] 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.

[0034] Before describing the fuel injection quantity control method, device and vehicle of the vehicle according to the embodiments of the present invention, the importance of accurately controlling the fuel injection quantity will be briefly described below.

[0035] In order to improve the fuel economy and performance indicators of gasoline engines, a large number of advanced technologies are widely used. Among them, the external cooling EGR technology is used to solve the knocking problem, so as to improve the thermal efficiency of the engine through lean combustion. Specifically, after adding the external EGR system, lean combustion is used in the low and medium load area, which can reduce the pumping loss; in the high load area, by reducing the temperature of the mixture gas at the end of compression, kn...

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Abstract

The invention provides a fuel injection amount control method and device of a vehicle, and the vehicle. The method comprises the steps of detecting the first air flow flowing through a throttle valve;acquiring the second air flow flowing through an EGR system; acquiring the waste gas flow in a gas cylinder, and acquiring the scavenging air flow in the process of ventilation; acquiring the scavenged air flow in the first air flow according to the first air flow, the second air flow, the waste gas flow and the scavenging air flow; and controlling the fuel injection amount according to the difference between the first air flow and the scavenged air flow. With the fuel injection amount control method, because the amount of the fresh air entering the cylinder can be calculated in real time, the fuel injection amount can be accurately controlled, the control accuracy of a gasoline engine is improved, and the oil consumption of the engine is reduced.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to a vehicle fuel injection quantity control method, device and vehicle. Background technique [0002] At present, when an external EGR (Exhaust Gas Recirculation, exhaust gas recirculation) system is added to the engine, the proportion of the sum of internal and external EGR in the mixture in the cylinder generally exceeds 10%, and can reach 30% to 40% at most. [0003] In related technologies, in order to ensure that as much fresh air as possible enters the cylinder, the engine generally adopts technologies such as VVT (Variable Valve Timing, engine variable valve timing) or optimized air passage to improve the scavenging process. However, in the process of using the intake air to sweep out the exhaust gas, part of the fresh air will be directly discharged with the exhaust gas, and the exhausted fresh air will not participate in the combustion, resulting in the air volume meas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/30F02D41/18F02D41/14F02D13/02F02D21/08
CPCF02D13/0261F02D41/0072F02D41/1446F02D41/1448F02D41/182F02D41/30F02D2200/101
Inventor 张志永翟昆仑杨忠良
Owner GREAT WALL MOTOR CO LTD