$objacople = new acople();
         $acos = $objacople->consulta_matriz("Select a.placa,ta.nombre from acoples_configuracion ac, acople a, tipo_acople ta where ac.id_configuracion_vehiculo = '" . $res[0]["id"] . "' AND ac.id_acople = a.id AND a.id_tipo_acople = ta.id");
         $txt_acoples = "";
         if (is_array($acos)) {
             foreach ($acos as $ac) {
                 $txt_acoples .= "" . $ac["placa"] . "(" . $ac["nombre"] . "), ";
             }
         }
         $res[0]["acoples"] = $txt_acoples;
         echo json_encode($res[0]);
     } else {
         echo json_encode(0);
     }
     break;
 case 'list':
     $res = $objconfiguracion_vehiculo->listDB();
     if (is_array($res)) {
         foreach ($res as &$act) {
             $act['id_unidad'] = $objunidad->searchDB($act['id_unidad'], 'id', 1);
             $act['id_unidad'] = $act['id_unidad'][0];
             $r1 = $objunidad->consulta_arreglo("Select * from tipo_unidad where id = '" . $act["id_unidad"]["id_tipo_unidad"] . "'");
             $act['tipo'] = $r1;
             $objacople = new acople();
             $acos = $objacople->consulta_matriz("Select a.placa,ta.nombre from acoples_configuracion ac, acople a, tipo_acople ta where ac.id_configuracion_vehiculo = '" . $act["id"] . "' AND ac.id_acople = a.id AND a.id_tipo_acople = ta.id");
             $txt_acoples = "";
             if (is_array($acos)) {
                 foreach ($acos as $ac) {
                     $txt_acoples .= "" . $ac["placa"] . "(" . $ac["nombre"] . "), ";
                 }
             }
             $act["acoples"] = $txt_acoples;