how to open IE browser in private mode with powershell script? $ie = New-Object -com internetexplorer.application

How can I open IE, in inPrivate Browsing mode using PowerShell script?

$ie = New-Object -com internetexplorer.application;
$ie.visible = $true;

$ie.navigate2("http://bing.com");
while ($ie.Busy -eq $true) { Start-Sleep -Milliseconds 1000; }

Ramana