Engine heat retention structure

1. A vehicle, comprising:

an engine bay having an upper wall, side walls, a front wall, and a rear wall;

an engine disposed inside the engine bay;

an upper lid part disposed inside the engine bay and covering the engine from above;

a shroud disposed inside the engine bay and formed in a frame shape having an opening disposed forward of the engine; and

a grille shutter provided to the shroud and configured to open and close the opening,

wherein a front end of the upper lid part is placed on an upper side of the shroud,

wherein the grille shutter is closed when an ignition is off,

wherein in a vehicle width direction, a first width that is a width of the side walls and a second width that is a width of the shroud are smaller than a third width that is a width of a traveling air introducing opening of a bumper face being located forward of the shroud, and

wherein in a vehicle height direction, a top end of the shroud is higher than an upper end of the traveling air introducing opening.

2. The vehicle of claim 1 , further comprising a dedicated heat retention member disposed inside the engine bay, and comprised of the upper lid part, the shroud, the grille shutter, and side wall parts covering sides of the engine.

3. The vehicle of claim 1 , wherein the grille shutter is provided to the shroud at a rear side.

4. The vehicle of claim 1 , wherein the opening formed in the shroud includes a plurality of openings, and the grille shutter includes a plurality of grille shutters corresponding to the plurality of openings,

wherein the vehicle comprises a grille shutter unit having a plurality of shutter holding parts holding the grille shutters,

wherein the plurality of shutter holding parts are directly attached to the shroud.