Power Sports and Electronic Fuel Injection Glossary
HARD TAIL
Refers to a bike with no rear suspension. Harley-Davidson motorcycles were all Hard Tails until 1958 when the Duo-Glide was introduced.
HARLEY DAVIDSON
A brand of motorcycle produced in the United States.
HONDA
A brand of motorcycle produced in Japan.
HORSEPOWER
A unit of measurement used to describe an engine's strength. Typically, the more horsepower an engine produces, the faster the motorcycle can potentially go. (See also: Torque)
HOT-FILM AIR-MASS METER
The heated element on the hot-film air-mass meter is a platinum film resistor (heater). It is located on a ceramic plate together with the other elements in the bridge circuit. The temperature of the heater is monitored by a temperature sensitive resistor (flow sensor) also included in the bridge.
HOT-WIRE AIR-MASS METER
The heated element on the hot-wire air-mass meter is a platinum wire only 70hm in diameter. A temperature sensor is integrated within the hot-wire air-mass meter to provide compensation data for intake air temperature. The main components in the control circuit are abridge circuit and amplifier. The heated wire and the intake-air temperature sensor both act as temperature-sensitive resistors within the bridge. The heating current generations a voltage signal, proportional to the mass air flow, at a precision resister. This is the signal transmitted to the ECU.
