Definition:
The electronic throttle
body (ETB) is a main part of an electronic throttle control (ETC) system. The
ETB controls the volume of air flowing into the engine. It features a butterfly
valve which opens and closes according to a signal from the engine control
unit.
Instead of a traditional throttle body with an accelerator cable, Hitachi’s ETB utilizes a microcomputer
to control the valve opening quickly and precisely. Precision is essential to keep engine torque at a constant level when changing the air/fuel ratio. A more
accurate ETB translates to improved fuel economy and emissions performance.
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Features:
· Compact, lightweight DC Motor – Allows for easy mounting in a variety of engines
· Equipped with a multiple-output throttle sensor – Allows for a more accurate signal output
· Non-contact position sensor – Increases durability
· Precise valve opening – Maintains stable performance at a wide range of environmental conditions
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Specifications:
· Bore sizes: 45-102mm diameter
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Signs to Service:
· The engine stalls or is likely to stall during deceleration or stopping
· The engine stalls or is likely to stall when the engine is warmed up or re-started
· Engine speed decreases while accelerating on a curved road
· Idle speed is reduced
