Cost Efficient And Effective Engine Control System

Introduction

Automotive manufacturers introduced microprocessor-based engine control system to cater conflicting demands of high fuel economy and low emission requirements in 1970. Modern day engine control system has many inputs like pressure, temperatures, rotational speeds, exhaust gas characteristics and many more. It also has numerous outputs like spark timing, exhaust gas recirculation, fuel-injector pulse width and much more. The unique aspect of automotive control problem is the need to produce a system that are relatively low cost. With thousands of available parts around the world, making them work without having maintenances is an inherent manufacturing variability. Aircraft and spacecraft have a more sophisticated technique has also been developed but has a nearly opposite set of conditions.

Method

The proponents of this study conducted numerous tests on different types of powertrains and engines that gave them the data needed to design a control system that will better the powertrains currently in used. Then they also tested the control system they developed many times to ensure quality.

Results

The results of the conducted tests were fuel consumption in lessened and torque is increased for a bit. Control on the wheels became smooth. The usefulness of the controller was showed further through additional experiments, where the ramp time was gradually decreased from 400 to 200 msec.

Analysis

All cases were characterized by well-controlled shifts. The example shows the flexibility offered by the microcomputer, so that now, unlike with conventional automatics, it is possible to adapt shift execution (“how-to”) as well as shift scheduling (“when-to”) to different driving conditions. Example, for better performance and economy, faster shifts may be more appropriate, such as the 200-msec ramp. In contrast, for improved comfort, the slower 400-msec ramp may be used.

Discussion

Since automotive applications involve millions of units and sophisticated microelectronics devices are relatively low cost in high-volume applications, the manager of microelectronic-driven control theory to the automobile represents an exciting frontier in control engineering research and development. A statistical number of control engineering techniques have been produced to deal with systems with such requirements, and, thus, the role of control engineering should increase dramatically in the automotive industry. Applications of control theory to stop speed and transmission control have been showed to illustrate the use of control theory in the computer control of automobiles. In addition, the structure of these first-generation systems was analyzed from a control theoretic perspective. Since automotive applications involve millions of units and sophisticated microelectronics devices are relatively low cost in high-volume applications, the manager of microelectronic-driven control theory to the automobile represents an exciting frontier in control engineering research and development.