Hi, here you have a snippet of code that works for me:

def _qweb_render(self, o=None):

    val = {

        'docs': o,

        'doc_model': 'motor.record',

        'doc_ids': [o.id],

    }

    html = self.pool["ir.ui.view"].render(self.env.cr, self.env.uid, 'yourmodule.your_view_xml_id, val, engine='ir.qweb', context=self.env.context).decode('utf8')

    return HTMLSafe(html)