Who invented the fuel injector?

While the concept of fuel injection has been around for a while, there's no single inventor. Its development was a gradual process with contributions from many engineers and inventors. However, Herbert Akroyd Stuart is often credited with a crucial early contribution with his design of a hot-bulb engine in the late 19th century, which used a rudimentary form of fuel injection. Later, many others refined and improved upon this, leading to the modern fuel injection systems we see today. Attributing invention to one person is therefore inaccurate.