Grille airflow shutter system with discrete shutter control

A shutter, discrete technology, used in coolant flow control, radiator, engine cooling, etc., can solve problems such as increasing physical hardware cost control algorithms and driver complexity, achieve effective variable airflow control, miniaturization Cost and complexity, effect of improving fuel economy

Inactive Publication Date: 2011-11-23
GM GLOBAL TECH OPERATIONS LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, while allowing variable control of the shutters, pulse width modulation significantly increases the cost of the physical hardware, and the complexity of the control algorithms and drivers

Method used

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  • Grille airflow shutter system with discrete shutter control
  • Grille airflow shutter system with discrete shutter control
  • Grille airflow shutter system with discrete shutter control

Examples

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Embodiment Construction

[0011] refer to figure 1 , which shows a vehicle indicated generally at 20 . The vehicle 20 may include a powerplant, such as an internal combustion engine 22 , and a transmission 24 . Coolant pumped through radiator 26 by water pump 27 may be used to cool internal combustion engine 22 . Also, transmission oil may flow through transmission oil cooler 28 to cool the transmission. Transmission oil cooler 28 and radiator 26 may be part of a condenser-radiator-fan module (CRFM) 30 which may also include condenser 32 in air conditioning system 34 . Other heat exchangers, such as those for powertrain electronics cooling (not shown), may also be part of the CRFM. The CRFM 30 may also include an engine fan 36 that may be driven by an electric motor 38 .

[0012] One or more controllers 40 may communicate with and control the engine 22 , transmission 24 , air conditioning system 34 , and electric motor 38 . Controller 40 may communicate with various sensors, such as engine coolant...

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PUM

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Abstract

The invention relates to a grille airflow shutter system with discrete shutter control. A method of controlling airflow through a grille on a front end of a vehicle comprising the steps of: detecting vehicle operating conditions; determining a desired percentage of airflow through the grille based on the desired operating conditions; actuating grille airflow shutters to an open position for the determined desired percentage of a predetermined time interval; and actuating the grille airflow shutter to a closed position for a remaining percentage of the predetermined time interval.

Description

technical field [0001] The present invention relates generally to vehicles having grille air shutters, and more particularly to grille air shutter systems and methods of controlling such systems. Background technique [0002] Grille airflow shutters are devices that control the amount of airflow through the front grille of a vehicle. Typically, airflow is controlled based on cooling or heating requirements for heat exchangers in a condenser-radiator-fan module (CRFM) located behind the grille. Greater airflow provides better heat transfer to the heat exchangers in the CRFM. Grille airflow louvers can be adjusted to block airflow through the grille when reduced or no airflow is required, and conversely, airflow louvers can be adjusted to allow all airflow through the grille when additional airflow is required . [0003] Grille airflow shutters have been controlled using one of two methods. There are discrete open / close shutters that only move between open and closed posit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K11/08B60R19/52
CPCF01P7/12B60K11/085Y02T10/88
Inventor T.K.洛克伍德D.L.博恩M.G.莱弗特R.K.辛赫J.W.京策尔
Owner GM GLOBAL TECH OPERATIONS LLC
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