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Forced Induction & Engine Management
How They Do That!
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<blockquote data-quote="Useless" data-source="post: 1429283" data-attributes="member: 670"><p>correct me if i am wrong sifu leow...</p><p>if we are at crusing speed (lets assume TPS=30%), the airmass would always be at a fixed value (lets assume 30kg/hr, with maybe +/- 5% tolerance due to other external factors i.e air temp, baro press, coolant temp, etc).</p><p></p><p>if we jab the throttle instantaneously (lets assume TPS=30%), the airmass would not be 30kg/hr, not will it fall in the tolerance of +/- 5%. i might be wrong here to say airmass is less (at the instance), i am thinking that the sudden opening of the throttle valve decreases vacuum in the manifold. therefore airmass is less? Or maybe as long as the airmass measured has a great positive or negative difference from 30, then output is extra fuel?</p><p></p><p>but i am thinking again maybe the Wira 1.6 Auto is more straight forward. The VR just increases or decreases the multiplication factor for fuel. Therefore setting it correct at idle will have a high chance to produce close to 14,7 at light driving conditions.</p><p></p><p>i am working in KL now. sent u a short PM. yes long time no see. will contact u if i am heading up north to ipoh.</p><p></p><p>regards</p></blockquote><p></p>
[QUOTE="Useless, post: 1429283, member: 670"] correct me if i am wrong sifu leow... if we are at crusing speed (lets assume TPS=30%), the airmass would always be at a fixed value (lets assume 30kg/hr, with maybe +/- 5% tolerance due to other external factors i.e air temp, baro press, coolant temp, etc). if we jab the throttle instantaneously (lets assume TPS=30%), the airmass would not be 30kg/hr, not will it fall in the tolerance of +/- 5%. i might be wrong here to say airmass is less (at the instance), i am thinking that the sudden opening of the throttle valve decreases vacuum in the manifold. therefore airmass is less? Or maybe as long as the airmass measured has a great positive or negative difference from 30, then output is extra fuel? but i am thinking again maybe the Wira 1.6 Auto is more straight forward. The VR just increases or decreases the multiplication factor for fuel. Therefore setting it correct at idle will have a high chance to produce close to 14,7 at light driving conditions. i am working in KL now. sent u a short PM. yes long time no see. will contact u if i am heading up north to ipoh. regards [/QUOTE]
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