cruise control vac.


Information and questions on GL1500 Goldwings (1988-2000)
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idflyit
Posts: 33
Joined: Tue Oct 28, 2014 7:24 pm
Location: Oklahoma City, Oklahoma
Motorcycle: 1999 Goldwing gl1500se

cruise control vac.

Postby idflyit » Mon Jan 12, 2015 2:17 pm



is there to be vacuum on this line with engine running....see pic
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WingAdmin
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Posts: 17050
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: cruise control vac.

Postby WingAdmin » Mon Jan 12, 2015 3:12 pm

You're looking at the cruise actuator. It has vacuum only when the cruise is actually actuated and holding the bike speed.

Cruise actuator circuit
Cruise actuator circuit


Engine vacuum is generated and stored in the accumulator. When the cruise computer wants to engage more throttle, it opens the vacuum valve, which draws more vacuum from the actuator (which then pulls the throttle open more). When the cruise computer wants to reduce throttle, it opens either the relief valve or vent valve (I can't recall which) and allows air in to relieve the vacuum.

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Mh434
Posts: 944
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Location: Victoria, British Columbia, Canada
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1981 GL1100I
1989 Kawasaki Concours

Re: cruise control vac.

Postby Mh434 » Mon Jan 12, 2015 4:03 pm

Man, WA, you are solid gold!!! Don't know what we'd do without you, brother!

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WingAdmin
Site Admin
Posts: 17050
Joined: Fri Oct 03, 2008 4:16 pm
Location: Strongsville, OH
Motorcycle: 2000 GL1500 SE
1982 GL1100A Aspencade (sold)
1989 PC800 (wife's!)
1998 XV250 Virago (sold)
2007 Aspen Sentry Trailer

Re: cruise control vac.

Postby WingAdmin » Tue Jan 13, 2015 10:19 am

It was driving me nuts that I couldn't remember the valve operation, so I had to go look it up.

The vent valve is the one that is opened by the cruise computer to allow atmospheric air into the actuator to reduce speed.

The relief valve is actuated (closed) whenever the cruise system is active. When the cruise system is deactivated, the relief valve opens, equalizing pressure.




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