Summary of Contents for Honda Accord 1986-310 Service Manual - Page 49

  • Honda Accord 1986-310 Service Manual - Page 49

    Carburetor rSecondary Diaphragm VaCUUm Bypass System—E 2.051 TYPE This system is designed to control vacuum bypass into the air cleaner to keep the secondary throttle valve closed in order to improve drivabililv when the engine is cold The carburetor thermovalve is controlled by a thermowax plunger. When (he thermowax ls coldl the valve is open When the thermowax melts, the valve closes, wnn the engine cold and (he lhermowax consequently cold, vemun vacuum bleeds on into the air cleaner so that the secondary Khrollle valve remains closed. When the engine reaches operating remperature, the valve is closed, allowing vacuum so act on rhe secondary diaphragm. The carburetor thermovalve is Iocared on the thermo case assembly. THERMOVALVE CHARACTERISTIC ORIF|CE DIAMETER (mull i —2n —lu n in M an no so mes nun: .Au u :z in as as m in lmqswinfi WAX TEMP. _. Tu uir clumr SECONDARV DIAPHRAGM CARBURETOR YHERMDVALV E 3-12