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A general discussion of crash sensor requirements is provided, with emphasis on the advantages of long inflation times. An explanation of the basic radar system is offered, and various designs, broken down both by antenna configuration and carrier modulation, are investigated. After careful study it is found that all radar sensors suffer from the same inadequacy-the inability to correctly classify obstacles into hazardous and nonhazardous categories. Several approaches to solving this problem are discussed. The conclusion is reached that radar crash sensors will be unavailable for MY 1976 air cushion requirements.

An integrated heating and air conditioning system that would automatically bring the passenger compartment to a comfortable temperature and maintain this temperature under all climatic and engine operating conditions has long been a goal of many automotive engineers in this field. Fulfillment of this objective was realized with the introduction of the Comfort Control system on the 1964 Cadillac. This paper presents a brief history of General Motors’ experience with automatic climate controls, describes the preliminary design and development of the Cadillac system, and explains how the Comfort Control system operates.

This paper presents a comprehensive guide of basic points concerning engineering supervision and management. It is based on the practical experience of supervisors, supplemented by research findings of behavioral scientists. The purpose is to introduce this important subject in a practical and useful way to interested engineers, as well as to furnish a systematic review for the further development of experienced supervisors. The first section covers the main responsibilities of technical work coordination and supervision; the second section covers the additional personnel and administrative responsibilities of the engineering supervisor. A selected reading list is also provided for reference to further information on specific subjects.

One of the functions of the Fastener Technical Section at GM Engineering Staff is to investigate the basic variables which affect fastener torque-tension relationships. The primary tool used for these investigations is the FTS Torque-Tension Test Machine. This machine has the capability of applying and measuring the torque to tighten, the resulting tension, the shank torque in the bolt, the number of degrees of rotation, and driver speed and air line pressure. In typical torque-tension testing, the tension in the fastener, the total tightening torque, and the torque in the bolt shank are measured using strain gaged load cells. In order to minimize test, and particularly, data reduction and analysis time, a computerized recording system is used. As a test is run, electrical signals from the load cells are stored and then automatically read into an IBM 1800 computer.

A design guide for bolt engagement in cast iron has been developed. The design engagements are sufficient to insure that if a bolt is overloaded and failure occurs, either at assembly or in service, the bolt will break rather than strip the bolt or cast iron threads. In addition to the design guide, this report presents information concerning: 1. The ratio of gray cast iron shear strength to tensile strength. 2. The ratio of shear strength to tensile strength for SAE Grade 5 and Grade 8 bolts.