Chassis Features And Specifications:

In the case of vehicles, the term chassis means the frame plus the “running gear” like engine, transmission, drive shaft, differential, and suspension.
A under body (sometimes referred to as “coachwork”), which is usually not necessary for integrity of the structure, is built on the chassis to complete the vehicle.For commercial vehicles, a vehicle consists of an assembly of all the essential parts of a truck (without the body) to be ready for operation on the road.The design of a pleasure car chassis will be different than one for commercial vehicles because of the heavier loads and constant work use. These include motor homes, fire engines, ambulances, box trucks, etc.
In particular applications, such as school buses, a government agency like National Highway Traffic Safety Administration (NHTSA) in the U.S. defines the design standards of this type of vehicle and body conversions.
An armored fighting vehicle’s hull serves as the chassis and comprises the bottom part of the AFV that includes the tracks, engine, driver’s seat, and crew compartment. This describes the lower hull, although common usage might include the upper hull to mean the AFV without the turret. The hull serves as a basis for platforms on tanks, armored personnel carriers, combat engineering vehicles, etc.
In an electronic device, the vehicle consists of a frame or other internal supporting structure on which the circuit boards and other electronics are mounted.
In the absence of a metal frame, the vehicle refers to the circuit boards and components themselves, not the physical structure.
In some designs, such as older sets, the vehicle is mounted inside a heavy, rigid cabinet, while in other designs such as modern computer cases, lightweight covers or panels are attached to the chassis.
The combination of this type of vehicle and outer covering is sometimes called an enclosure.