Gordon,
The injector pulse duration will generally range betwen 2 and 8 milliseconds, primarily determined by manifold pressure rather than RPM. Discounting volumetric efficiency changes, the engine uses more fuel at high RPM not because the pulses are longer,
but rather because they happen more often.
Steve
From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of Gordon Alling [gordon@acumen-ea.com]
Sent: Tuesday, April 23, 2013 7:01 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Fuel injector pulse frequency
Thanks, Steve. This is really great info. Do you have any info on the range of the injector pulse duration over the RPM range, i.e. min and max pulse duration I can expect?
Thanks.
Gordon C. Alling, Jr., PE
President
acumen
Engineering/Analysis, Inc.
540-786-2200
www.acumen-ea.com