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A control method and device for improving vehicle parking nvh performance

A control method and performance technology, applied in the direction of engine control, combustion engine, machine/engine, etc., can solve the problem of obvious vibration of the whole vehicle

Active Publication Date: 2022-03-22
SAIC MOTOR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But at present, in some three-cylinder vehicle projects, the throttle valve has been closed to the minimum, but the vibration of the vehicle is still obvious

Method used

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  • A control method and device for improving vehicle parking nvh performance

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Embodiment Construction

[0052] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0053] A typical VVT system is mainly composed of a phaser and an oil control valve, wherein the phaser is the actuator of the system, and the oil control valve is the controller of the system.

[0054]The engine management system EMS (usually also called engine ECU) searches the MAP map according to the signals from the throttle opening sensor, engine water temperature sensor, speed sensor, air flow meter, etc. The hour angle is the target position; at the same time, the engine management system EMS calculates the actual position of the camshaft based on the feedback signals from the crankshaft position sensor and the cam position sensor. The EMS compares the target position with the actual position, and sends an actuation signal t...

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Abstract

The invention discloses a control method and device for improving the NVH performance of a vehicle when parking. The control method includes: judging whether the vehicle is turned off and shut down; The VVT ​​anti-vibration angle at which the intake valve is opened after the compression top dead center or the exhaust valve is closed before the compression top dead center; adjust the operating angle of the VVT ​​system to the determined VVT anti-vibration angle, and when the vehicle is turned off and stopped Adjust the phase of the intake valve or exhaust valve when the engine speed is completely 0; adjust the operating angle of the VVT ​​system back to the reference position. From the perspective of the vibration source itself, that is, the three-cylinder engine, this method proposes a strategy of changing the VVT ​​angle during shutdown to improve the NVH performance of the vehicle at shutdown and effectively solve the vibration problem of the vehicle during shutdown.

Description

technical field [0001] The invention relates to the technical field of automobile engines, in particular to a control method for improving the NVH performance of the whole vehicle when it is parked. The invention also relates to a control device for improving the NVH performance of the whole vehicle when parking. Background technique [0002] In recent years, major automakers have successively launched a new generation of small-displacement three-cylinder supercharged engines, with displacement concentrated in the range of 1.0L to 1.5L. The power output level can only be achieved by four-cylinder engines of the 1.6L to 2.4L level in the past. [0003] However, compared with four-cylinder engines or even six-cylinder and eight-cylinder engines, three-cylinder engines still have many deficiencies in terms of power continuity, vibration and noise, life and durability, high-speed power, and throttle response. Among them, vibration and noise are taken as an example. The large j...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D29/02F02D13/00
CPCF02D29/02F02D13/00Y02T10/12
Inventor 仇杰薛小兵李继
Owner SAIC MOTOR