Adjustable trigger switch for nitrous oxide injection application

Abstract

A low power or current draw adjustable trigger switch and method and system for using the adjustable trigger switch in conjunction with a triggered accessory for an internal combustion engine, such as a feed from a source of compressed oxygen enhancer, such as nitrous oxide. The adjustable trigger switch, in operation in conjunction with the triggered accessory, allows selective activation of the accessory to, for example, improve engine performance. In one application, the triggering occurs via an engine electrical output, such as a throttle position sensor (TPS) voltage. The trigger, which includes, for example, an operational amplifier circuit, logic gates, or a series of transistors (e.g., a Schmitt trigger), operated in conjunction with a user variable setting, such as a potentiometer, and an indicator for proper setting, such as a light emitting diode (LED), allows variable tailoring of the trigger to the sensed output at a selected output setting without incurring significant power or current draw from the sensed output. Another aspect of the invention is use of a low power or current draw switch, such as a metal-oxide-semiconductor field-effect transistor (MOSFET) that further allows triggered accessory operation at high power or current draw without producing high power or current through the sensing circuit itself.