Abstract
In a massive effort to limit automotive exhaust pollution, one of the devices being evaluated carefully is an electronically controlled fuel-injection system. The British prototype fuel- injection system (developed for a standard Triumph Sedan) that minimises pollutants by measuring exact quantities of fuel and timing their insertion into combustion chambers is discussed in detail. Engine speed and throttle angle information are stored in a digital memory containing 256 seven-bit words (MOS read-only memory). The data converting, engine-speed conversion, and the two interpolation circuits are described.