A modular chassis is provided for an off-road vehicle to improve assembly, servicing, and repairing of a drivetrain of the off-road vehicle. The modular chassis includes a chassis to support components of the off-road vehicle. A front frame module couples with a front of the chassis, and a rear frame module couples with a rear of the chassis. The front frame module supports lower suspension arms of the off-road vehicle by way of inboard bushing joints. The front frame module supports at least a steering gear and a front differential of the off-road vehicle. The rear frame module is a tube-frame structure that supports components of the off-road vehicle. A lower portion of the rear frame module extends rearward and acutely upward to a top frame member that couples with upper side portions of the chassis. Several cross-members impart structural integrity to the rear frame module.

A vehicle may include a CVT unit or a power source which requires ambient air. An air inlet for an air intake system coupled to the CVT unit or the power source which requires ambient air may be provided in a side of a cargo carrying portion of the vehicle. The vehicle may include a rear radius arm suspension.

A vehicle including: a frame; front suspension assemblies and wheels; a rear left suspension assembly connected to the frame; a rear right suspension assembly connected to the frame; rear wheels having a wheel axis and an inner rim radius; a rear gear train; and a motor. Each rear suspension assembly including a swing arm; a shock assembly; a knuckle including: a first portion connected to a wheel hub, and a second portion extending upward from the first portion; a first link having an outward end connected to the first portion and an inward end connected to the frame; and a second link having an outward end connected to the second portion and an inward end connected to the frame, the outward end of the second link being distanced from the corresponding wheel axis by a distance greater than the inner rim radius.

A carrier for suspension system of vehicles may include wheel bearing mounting part configured to have center provided with through hole, outside circumferential surface of the through hole being provided with at least one fastening hole; upper arm mounting part configured to be formed at upper portion of the wheel bearing mounting part and fastened with upper arm; lower arm mounting part configured to be integrally formed at one side toward rear of the vehicle from lower portion of the wheel bearing mounting part; reinforcing part configured to be extended from the wheel bearing mounting part to front of the vehicle; trailing arm mounting part configured to be integrally connected to the reinforcing part and fastened with trailing arm; and assist arm mounting part configured be integrally formed at lower portion of the flat extending end and fastened with assist arm.

Disclosed herein is a novel chassis design that is functionally similar to the chassis associated with the suspension system, drivetrain, and steering system disclosed in prior applications. Based on a ladder-type structure, the novel chassis includes a frame that is constructed with a low slung middle section and high arched front and rear sections. This way, the powertrain is located in the middle section at the same level as are the suspension control link frame mounting points. In contrast the chassis associated with the prior applications is planar, the powertrain being located within the frame above the suspension control link frame mounting points. Since the powertrain directly impacts the center of gravity and since the suspension control link frame mounting points are located at the lowest level of the frame in both the present invention and cited applications, then the present invention improves upon the handling characteristics of the chassis associated with the prior applications by lowering the center of gravity while preserving ground clearance.

Disclosed herein is a report on a drivetrain specifically designed to operate in conjunction with the Extreme-Travel Independent Suspension System. In a prior disclosure, we introduced a drivetrain concept derived from the unique configuration of the suspension system. The concept defines several elements, one element is a gearbox that is fabricated into the frame, the gearbox being called the reverse power coupler. Other elements of the concept include a differential mounted offset power coupler and differential housing assemblies. The drivetrain cooperates with the suspension configuration of upper and lower leading and trailing links thereby retaining the suspension system's fundamental propertieshandling quality like a double A-arm independent suspension system and travel and articulation capabilities similar to Ford's Twin I-Beam front suspension system. This report integrates the elements introduced in the prior disclosure with novel mechanistic features of the drivetrain. The features concentrate on the means by which power is transmitted from a differential housing to the wheels. Included in the features are the operations of the elements and the association of the elements with short and long axle shafts. The axle shafts serve as the principle conduits for transmitting power from one element to another.

Some embodiments are directed to a vehicle frame assembly configured to accommodate different first and second suspension system configurations via mounting fixtures. The vehicle frame assembly can include a main frame assembly, and a frame assembly connected to and extending away from the main frame assembly. Multiple mounting locations can be provided on at least one of the main frame assembly and the frame assembly, each of the mounting locations being configured to accommodate one of the mounting fixtures. The mounting locations can include a first set configured for use with the first suspension system configuration, and a second set configured for use with the second suspension system configuration.

Disclosed herein is a report on a drivetrain specifically designed to operate in conjunction with the Extreme-Travel Independent Suspension System. In a prior disclosure, we introduced a drivetrain concept derived from the unique configuration of the suspension system. The concept defines several elements, one element is a gearbox that is fabricated into the frame, the gearbox being called the reverse power coupler. Other elements of the concept include a differential mounted offset power coupler and differential housing assemblies. The drivetrain cooperates with the suspension configuration of upper and lower leading and trailing links thereby retaining the suspension system's fundamental properties--handling quality like a double A-arm independent suspension system and travel and articulation capabilities similar to Ford's Twin I-Beam front suspension system. This report integrates the elements introduced in the prior disclosure with novel mechanistic features of the drivetrain. The features concentrate on the means by which power is transmitted from a differential housing to the wheels. Included in the features are the operations of the elements and the association of the elements with short and long axle shafts. The axle shafts serve as the principle conduits for transmitting power from one element to another.

A vehicle may include a CVT unit or a power source which requires ambient air. An air inlet for an air intake system coupled to the CVT unit or the power source which requires ambient air may be provided in a side of a cargo carrying portion of the vehicle. The vehicle may include a rear radius arm suspension.

Some embodiments are directed to a vehicle frame assembly configured to accommodate different first and second suspension system configurations via mounting fixtures. The vehicle frame assembly can include a main frame assembly, and a frame assembly connected to and extending away from the main frame assembly. Multiple mounting locations can be provided on at least one of the main frame assembly and the frame assembly, each of the mounting locations being configured to accommodate one of the mounting fixtures. The mounting locations can include a first set configured for use with the first suspension system configuration, and a second set configured for use with the second suspension system configuration.