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Method and system for controlling an actuator of a small opening and regulating discharge valve

An actuator and valve technology, applied in engine control, electrical control, fuel injection control, etc., can solve the problem of not being able to obtain instantaneous set points, and achieve the effect of preventing oscillation

Active Publication Date: 2016-10-12
RENAULT SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] As a result of the above sequence of opening and closing, an oscillation situation develops, which means that the required instantaneous set point cannot be obtained

Method used

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  • Method and system for controlling an actuator of a small opening and regulating discharge valve
  • Method and system for controlling an actuator of a small opening and regulating discharge valve

Examples

Experimental program
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Embodiment Construction

[0025] The control method is demonstrated in the context of controlling an actuator of an intake valve of a diesel-type internal combustion engine that includes a low-pressure partial exhaust gas recirculation (EGR) circuit and a high-pressure EGR circuit. However, the control method can be adapted to control an actuator of an intake valve of an internal combustion engine without an EGR circuit or including a high pressure EGR circuit or a low pressure EGR circuit, and more generally An actuator used to control any small opening by limiting the closing speed at the stopper when the actuator is prevented from being damaged.

[0026] The method for controlling the actuator of the partial exhaust gas recirculation valve includes a step 1 of comparing a measured flow rate with a reference flow rate. In the following step 2, the opening degree of the actuator is controlled so as to eliminate the difference between the measured flow rate and the reference flow rate.

[0027] When the ac...

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PUM

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Abstract

Method and system for controlling the actuator of a small-opening and regulated-delivery valve. System for controlling the actuator of a partial exhaust gas recirculation valve (16) in an internal combustion engine (10) for a motor vehicle equipped with at least one means (12) of measuring the flowrate of air admitted and with at least one circuit (15) for partial exhaust gas recirculation and controlled by a means (17) of controlling the admitted gases which is able to determine an admitted-air setpoint value, . the control system comprising a means of comparing the flowrate measurement against a flowrate setpoint value (19) able to emit a setpoint value for the position of the actuator which is regulated by an actuator control means (22) capable of preventing damage to the valve, . a means (23) of determining a break in regulation, a means (24) of determining resumed regulation, which means are connected to a regulation control means (25) able to stop regulation and close the valve at a velocity profile that protects the valve from damage when the position of the valve reaches a predefined threshold position indicating that it is near its end stops.

Description

Technical field [0001] The technical field of the present invention is the control of internal combustion engines, and more specifically, diesel type internal combustion engines with intake valves. Background technique [0002] The control of the internal combustion engine allows adjustment of the amount of intake air and fuel into the engine in order to optimize the function of the engine. To achieve this, different flaps and valves allow changes in the circulation of fresh air, exhaust, and fuel. These control methods and systems act on these valve flaps and valve actuators to control their opening. [0003] However, discs and valves are sensitive mechanical components and must be carefully controlled to avoid damage. These elements closing too quickly may damage the valve flap or the shoulder of the valve through their impact on the corresponding stop. Safety features cannot be easily incorporated into methods and systems for determining valve flaps and valve opening. So a t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/00F02D41/18F02D41/14
CPCF02D41/0077F02D41/1488F02D41/18F02D2041/1419Y02T10/40
Inventor Y·佩迪永J-O·隆巴尔丹
Owner RENAULT SA