Search Results

A detailed methodology is presented in this paper for a complete assessment of various forces, torques, and kinematic effects due to universal joint angularities and shaft yoke phasing. A modular approach has been adopted wherein constitutive equations represent each of the key elements of a driveline namely the driveshaft, coupling shaft, universal joint, and the transmission/axle shafts. Concentrated loads are used wherever loads are being transferred between the elements of a driveline. Local matrices are developed for the equilibrium of the respective driveline members. The local matrices are then assembled into a global matrix and solved for the kinematic state of the complete driveline. A 6x15 matrix has been developed to represent a general shaft in the system and a 6x10 matrix has been developed for a universal joint cross. This gives us a complete picture of all the loads on all driveline members.

ON THE basis of laboratory and field tests of passenger-car and light-truck rear axles, the authors conclude: 1. The capacity of present axles can be increased, without increasing axle size, when greater load-carrying antiwear and antiscore lubricants are available. 2. Gear noise will always be a major problem because axle gears are operating at varying speeds and loads whenever a car is in motion. Many gear noise problems can be overcome by proper tooth development and by testing in the actual car model under which the axle will be used. 3. The only reliable basis for torque-capacity rating is the tractive effort (wheel-slip torque). 4. The limited-slip type of differential will eventually become standard equipment on all passenger cars, if only to improve car handling and stability during high-speed driving under varying traction conditions.

A turbine engine powered vehicle requires a power transmission system with distinct differences over one required with other powerplants. The power transmission components can be modified to accommodate the new requirements. As turbine engines become more popular a more optimum approach to power transmissions is needed. Some reasonable possibilities are discussed. The manner in which components have been applied and the results obtained along with future possibilities are covered in the area of clutches, mechanical transmissions, and drivelines and axles.

A simple and basic laboratory test is described which may be used to evaluate and compare axle noises in a passenger car. In this method, a number is assigned to the magnitude of a given noise at any given frequency through a complete range of speed and load conditions during typical vehicle operation. A chassis dynamometer is used to simulate road conditions, and various pickup and recording instrumentation are employed to record the objectionable noises under different operating conditions and speeds.