Dictionary of Automotive Terms Abbreviations

DICTIONARY OF AUTOMOTIVE TERMS - "Lh"

L-head engine: L-head engine

An engine having both valves in the block and on the same side of the Cylinder. The arrangement of the valves in the block and the Combustion chamber forms an L shape. This type of valve train was used in the early years of automotive engineering and is no longer found (with some minor exceptions) in modern engines. Compare F-head engine where one valve is in the head and the other is in the block; and I-head engine where both valves are in the head and none in the block. Also called side-valve engine.

Also See
Flathead.

LH-Jetronic: Bosch LH-Jetronic system measure air mass (weight of air) with a hot-wire sensor instead of measuring airflow with a vane, or flap, type air volume sensor used on L-Jet systems. The H is short for heiss hot