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Fuel control device and control method for manifold injection gasoline engine

A gasoline engine, fuel control technology, applied in engine control, fuel injection device, fuel injection control and other directions, can solve the problems of deterioration of emissions, inaccurate fuel injection compensation parameters, etc., to achieve the effect of improving exhaust emissions

Active Publication Date: 2022-04-29
日立安斯泰莫汽车系统(中国)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to solve the problem of emission deterioration caused by inaccurate fuel injection compensation parameters caused by poor engine manufacturing or life aging, the present invention adopts an online parameter adjustment method based on air-fuel ratio sensor data

Method used

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  • Fuel control device and control method for manifold injection gasoline engine
  • Fuel control device and control method for manifold injection gasoline engine
  • Fuel control device and control method for manifold injection gasoline engine

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Embodiment Construction

[0031] The present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments.

[0032] Preferred embodiments of the fuel control device and control method for a manifold injection gasoline engine according to the present invention will be described in detail below with reference to the drawings. In addition, in the description of the drawings, the same reference numerals are attached to the same or corresponding parts, and overlapping descriptions are omitted.

[0033] figure 1It is an explanatory diagram of the system configuration of the fuel control device of the manifold injection gasoline engine of the present invention. The system consists of an internal combustion engine and its connected intake and exhaust pipelines. An air flow meter 1 and a gas temperature sensor built in the air flow meter are arranged in the intake pipeline. Downstream of the intake line is a throttle valve 2 that controls the amount of air en...

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Abstract

The present invention provides a fuel control device and a control method for a manifold-injection gasoline engine. The control device includes: an internal combustion mechanism; an intake pipeline and an exhaust pipeline connected to the internal combustion mechanism; a throttle valve configured on the intake pipeline downstream of the intake manifold; the intake manifold is arranged downstream of the throttle valve; the fuel injector is used to inject gasoline into the intake manifold; at least one cylinder has intake valves and exhaust valves; the air-fuel ratio sensor is arranged in the exhaust The downstream of the air pipeline; and the controller, the controller compares the actual air-fuel ratio data measured by the air-fuel ratio sensor with the recorded data of the transient air-fuel ratio of the working condition stored in the ECU, and when the comparison result exceeds the specified range, the The air-fuel ratio target value is adjusted to a value fluctuating within a specified range, and the fuel compensation parameters are corrected in real time according to the adjusted waveform of the measured air-fuel ratio data. According to the present invention, fuel compensation parameters can be adjusted in real time.

Description

technical field [0001] The invention relates to a fuel control device and a control method of a manifold injection gasoline engine. Background technique [0002] The control of the air-fuel ratio has a significant impact on the engine's power, economy, and exhaust emissions. The inaccurate control will lead to a decline in the power and economy of the gasoline engine, and an increase in the emission of harmful gases. Therefore, precise control of fuel injection to achieve precise air-fuel ratio control is of great significance for reducing exhaust emissions and reducing air pollution. [0003] The fuel injection system of the engine itself is a very complex nonlinear system, especially in the transient condition of the engine's rapid acceleration and deceleration. In the manifold injection engine, the evaporation mechanism of the fuel, the formation process of the mixture, etc. cannot be described by an accurate physical model, and these all affect the control of the fuel ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/14F02D41/32F02M61/14
CPCF02D41/1475F02D41/32F02M61/145
Inventor 于广安部元幸
Owner 日立安斯泰莫汽车系统(中国)有限公司
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