Unlock instant, AI-driven research and patent intelligence for your innovation.

Method, device and system for determining engine intake and exhaust phase

An engine, intake and exhaust technology, applied in the direction of engine testing, measuring devices, machine/structural component testing, etc., can solve problems such as uncomfortable transient conditions and low efficiency, and achieve high testing efficiency

Active Publication Date: 2022-07-22
SAIC MOTOR
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the intake phase and exhaust phase of the engine are mainly measured by an oscilloscope, but this method has the disadvantages of low efficiency and not suitable for transient conditions

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method, device and system for determining engine intake and exhaust phase
  • Method, device and system for determining engine intake and exhaust phase
  • Method, device and system for determining engine intake and exhaust phase

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0092] As an embodiment, the preprocessing unit includes:

[0093] The basic data acquisition sub-unit is used to control the engine to be in a plurality of preset steady-state working conditions in sequence, and obtain the calibration basic data of the engine under each steady-state working condition, wherein the calibration of the engine under one steady-state working condition The basic data includes: the duty ratio of the PWM signal of the intake valve of the engine and the intake phase of the engine, and the duty ratio of the PWM signal of the exhaust valve of the engine and the exhaust phase of the engine;

[0094] The basic data processing sub-unit is used to determine the corresponding relationship between the duty ratio of the PWM signal of the intake valve of the engine and the intake phase based on the obtained multiple sets of calibration basic data, and determine the duty of the PWM signal of the exhaust valve of the engine. The relationship between the ratio and ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present application discloses a method for determining an intake and exhaust phase of an engine, comprising: obtaining PWM signals of an intake valve and an exhaust valve in a VVT system of an engine; determining a first duty ratio of the PWM signal of the intake valve, The second duty cycle of the PWM signal of the air valve; based on the pre-calibrated relationship between the duty cycle of the PWM signal of the intake valve of the engine and the intake phase, the intake phase corresponding to the first duty cycle is determined; based on The pre-calibrated correspondence between the duty cycle of the PWM signal of the exhaust valve of the engine and the exhaust phase determines the exhaust phase corresponding to the second duty cycle. Based on the method disclosed in the present application, the intake and exhaust phases of the engine under transient conditions can be determined, and the test efficiency can be improved.

Description

technical field [0001] The present application belongs to the technical field of engines, and in particular, relates to a method, device and system for determining the phase of intake and exhaust of an engine. Background technique [0002] At present, VVT technology is generally used in engines. The core of this technology is: during engine operation, according to the engine speed and load, adjust the opening and closing timing of the intake valve and exhaust valve of the engine, so that the intake air of the engine can be adjusted. The optimum amount of fuel can be used to improve the combustion efficiency, thereby improving the power performance of the engine. [0003] In the development and design stage of the engine, the intake and exhaust phase of the engine is a very important parameter, especially the intake and exhaust phase under transient conditions. The actual opening moment and the actual closing moment of the exhaust valve. At present, the intake phase and exh...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01M15/00
CPCG01M15/00
Inventor 简辉
Owner SAIC MOTOR