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FJR Motorcycle Forums
Technical & Mechanical Problems
(split) What is PAIRS system?
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<blockquote data-quote="Fred W" data-source="post: 1349118" data-attributes="member: 3828"><p>PAIR System:</p><p></p><p>AIR INDUCTION SYSTEM</p><p>The air induction system (AI system) introduces fresh air into the exhaust port in order to burn the</p><p>unburned gas (which is present in the exhaust gas) in the exhaust pipe. The burning of the</p><p>unburned gases in this manner enhances the efficiency of the catalyst and results in cleaner</p><p>exhaust gases.</p><p>The AI system takes a portion of the air from the air cleaner, sends it to the reed valve via the air</p><p>cut-off valve, and introduces it directly into the exhaust port through the reed valve.</p><p>The air cut-off valve is controlled by the signals from the ECU in accordance with the combustion</p><p>conditions. Ordinarily, the air cut-off valve opens to allow the air to flow during idle and closes to cut</p><p>off the flow when the motorcycle is being driven. However, if the coolant temperature is below the</p><p>specified value, the air cut-off valve remains open and allows the air to flow into the exhaust pipe</p><p>until the temperature becomes higher than the specified value.</p><p>The reed valve is provided on the cylinder head cover above the cylinders, and sends air to the</p><p>exhaust pipe through the inside of the cylinder head.</p></blockquote><p></p>
[QUOTE="Fred W, post: 1349118, member: 3828"] PAIR System: AIR INDUCTION SYSTEM The air induction system (AI system) introduces fresh air into the exhaust port in order to burn the unburned gas (which is present in the exhaust gas) in the exhaust pipe. The burning of the unburned gases in this manner enhances the efficiency of the catalyst and results in cleaner exhaust gases. The AI system takes a portion of the air from the air cleaner, sends it to the reed valve via the air cut-off valve, and introduces it directly into the exhaust port through the reed valve. The air cut-off valve is controlled by the signals from the ECU in accordance with the combustion conditions. Ordinarily, the air cut-off valve opens to allow the air to flow during idle and closes to cut off the flow when the motorcycle is being driven. However, if the coolant temperature is below the specified value, the air cut-off valve remains open and allows the air to flow into the exhaust pipe until the temperature becomes higher than the specified value. The reed valve is provided on the cylinder head cover above the cylinders, and sends air to the exhaust pipe through the inside of the cylinder head. [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
(split) What is PAIRS system?
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