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Lear Corporation has developed a new OneStep™ Liftgate trim module. The panel consists of all mechanical components and a trim cover assembled into one module. This structural liftgate uses the trim substrate and a “beam” as the common attachment point for all liftgate hardware. The assembly includes all of the liftgate components mounted to the back of the interior trim panel.

A fundamental problem with methanol fueled engines is poor cold startability and high formaldehyde emissions during engine warm-up. Direct injection has the potential to solve these problems. The design and development of an electronically controlled low pressure injector which provides an alternative to high pressure “diesel” type injection is reviewed.

Increasingly stringent diesel engine emissions legislation is creating the need for precisely controlled engine timing. Closed loop timing is possible based upon a suitable feedback sensor. Sensing the fuel injection event is convenient, but fails to take into account the variable ignition delay period. By optically sensing the start of combustion (S.O.C.) a closed loop system based upon the final event can be achieved. The system configuration, and some problems encountered during the design and development process are discussed.

The need for diesel engines to achieve good fuel economy with low exhaust emissions poses a complex development problem with sometimes conflicting requirements. In order for these to be addressed, there is a need for a flexible high performance fuel system. This paper describes a heavy duty in-line fuel pump designed for electronic control. It is configured to fit class 7 and 8 truck engines, and features high injection pressure with full authority variable timing.

The continuing advances being made in microcomputer technology have resulted in its application to an ever increasing range of control systems. The improved performance and flexibility that would be achieved by a microcomputer based diesel engine fuel system cannot be matched by hydromechanical controls of the type currently used. Before an electronic system can be successfully introduced in the harsh heavy-duty truck environment, however, it must meet stringent reliability and durability goals at reasonable cost. This paper outlines some of the problems encountered and solutions implemented in the design of an electronic fuel pump for this market.