The SU Carburetors Company
Mr. George H In 1905. Skinner require out a flagrant for a carburetor in which both the air and fuel flow mixed in conformity with the demand of the engine. The original form was a clean and simple layout in decided contrast to the multi jet fixed choke carburetors and it supply a standard of elasticity and economy of operation hitherto exotic.
Engine Emission Control
The coming features represent in S.U. carburetors considerably reduce the hurtful elements found in engine exhaust gases, and progress resources at S.U. are apply on bearing other bettering which will more help in clear up the pollution problem.
Spring Loaded Jet Needle
The jet needle is stored in a designed position in the jet orifice of a spring loaded fixing. This assurance that the alike shape and position of the orifice in carburetors of the alike condition is continue with successive repeatable discharge values.
Overrun Limiting Valve
A equitable set spring-loaded plate valve is planted in the throttle disc. The valve opens under extreme multiple depression surroundings, i.e. eclipse at closed throttle, reducing the low spirits and flowing a quantity of exact fuel/air mixture through the throttle disc.
Integral Crankcase Ventilation Control
Engine pollution and blow by gases are exhausted from the crankcase via a rest hose into the constant low spirits area between the carburetor piston and throttle disc remove the need for a individual direction.
Temperature Compensation (HS4 and HS8 models only)
Bi-metal discs arbitrate between the jet and the mixture adjust lever, move the jet to make up for changes in mixture strength which arrive with difference in temperature.
Ball Bearing Suction Chamber Assembly
The piston lead rod moves in a double row of ball bearings, by that virtually remove the effects of friction and hysteresis. With this article strength of carbon monoxide issuance at idle speeds is achieved, together with further decline of issuance levels during acceleration and deceleration and improvement in repeat ability of issuance values.
The subject of a recent S.U. clear request is 38.1 mm (1.5 in), 44-45 mm (1.75 in). and 50-80 mm (2.0 in) carburetor.
The competitively valued type Horizontal Short body (HS) is the current of a long line of side backed float chamber S.U. carburetors. The jet is augment by a flexible nylon tube from the low of the float chamber and vertical movement of the jet supply cold start improvement.
The HS type is available for both single and multi carburetor use complete with all primary marry linkage in throttle bore sizes varying from 31’75 mm (1•25 in) to 50•8 mm (2’0 in). They may be placed at angles changing from horizontal to 30° below elixir and are available with strong or flexible float chamber ascension.
– Proved constant depression principle
– R.H. or L.H. float-chamber mounting
– Flexible or solid-mounted float- chamber
– Three controls:
– mixture adjustment
– slow run
– fast idle
– mixture arrangement
– lazy run
– fast empty
– Overrun limiting valve
– Easy accessible mixture adjustment
– with sealing facility
– Spring loaded jet needle assembly
– Crankcase ventilation control
– Alternative float-chamber vent positions
– DU throttle bushes and rubber seals
The HIF type is applicable for both single and multi carburetors function, complete with all basic connecting connection, in throttle bore sizes of 38.1 mm (1.5 in) and 44-45 mm (1.75 in), and may be seated at any angle from horizontal to 40° down drought broad.
The overwork discharge features detailed prior are fitted as standard on the HIF area.
The HIF carburetor is the most new type to be added to the S.U. range and when equipped with the ball bearing suction chamber assembly perform the very latest in constant abasement carburetor design.