1 M11-5301511 BOTTOM COVER 2 M11-5301513 BOTTOM COVER SEAL 3 M11-8401115 ENGINE HOOD TRIM BOARD 4 M11-8402227 FRONT SEAL 5 M11-8402223 HEAT INSULATION PAD-ENGINE COVER 6 M11-8402228 REAR SEAL 7 M11-8402220 ENGING HOOD STRUT 8 M11-8402541 ENGING HOOD RELEASE CABLE I Hood and trunk lid function: it is an outward movable body panel located in front and rear of the vehicle windshield to protect and cover the engine, luggage or storage. II Purpose of hood and trunk lid: 1) In case of collision, the hood assembly, trunk lid assembly and other body panels work together to protect passengers. 2) In terms of body modeling, the front of the body gives people the most feeling and the most prominent impression, which is a main aspect of evaluating the car modeling. The rear of the car body is also the object that people pay attention to and pay attention to now. Together with other outer covering parts of the body, it must meet the overall modeling requirements of the body appearance. 3) It also plays a vital role in aerodynamics and pedestrian protection. III Design principle of engine hood assembly and trunk lid assembly 1. Secondary cover body 1.1 generally, the front part of the engine hood is fixed with a lock, and the rear part is hung on the upper cross beam of the body cowl panel through a hinge and opened backward. The trunk lid is suspended on the rear wall baffle, and the rear end is fixed with a lock and opened forward. Both covers are composed of inner and outer plates. The outer plate is a large covering part on the vehicle body, and its shape must meet the requirements of vehicle body modeling; In order to enhance its stiffness and reliably fix it on the vehicle, the inner plate is generally used to strengthen it. The inner plate is arranged around the outer plate of the cover and cover, and is combined with the outer plate through flanging, pressing, bonding or welding; The inner plate is welded with a reinforcing plate for installing hinges, locks and support rods; In order to lighten the weight, the material with small stress shall be excavated from the inner plate by optimizing the calculation method. 1.2 there are bending features in the middle of the hood inner plate. We call it pressure feed reinforcement. Its main purpose is to improve the bending resistance, compressive strength and stiffness of the cover. For example, in case of collision, ensure that the hatch cover is bent and deformed to absorb energy and protect passengers. 1.3 the connection mode between the inner plate of the engine hood and the rear trunk lid and the outer plate, in addition to the surrounding edge wrapping, in order to increase the strength of large-area covering parts and eliminate the vibration and noise between the plates, glue points are evenly distributed between the inner plate and the outer plate, and the features of depression shall be designed at the glue application place, which is called glue holding groove. The gap between the base surface of the designed glue holding tank and the outer plate shall be 3-4mm