owners manual Honda Civic

owners manual Honda Civic - year of production: 1987, 1988, 1989, 1990, 1991 - Honda Civic IV 4 Hatchback Sedan owners manual EN

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text version of content this owner's manual page from owners manual to the vehicle Honda Civic, year of production 1987 - 1991:

Main Menu ▲ ▼ Evaporative Emission Control System The Evaporative Emission Control System is designed to prevent fuel vapors from escaping into the atmosphere. Fuel vapors from the fuel tank are directed into the charcoal canister where they are adsorbed and stored while the engine is stopped or idling. When the coolant temperature rises to a certain value, the vapors are drawn into the engine through the throttle body and the intake manifold during normal engine operation. Engine Exhaust Emission Controls The engine exhaust emission control systems are designed to control combustion during idle, acceleration, cruise, and deceleration. These systems are entirely separate from the crankcase and evaporative emission control systems described previously. HONDA PGMFI System The PGMFI system consists of three independent subsystems; Air Intake, Electronic Control and Fuel Control, thus allowing more accurate control of air/fuel ratios under all operating conditions. The Electronic Control Unit (ECU) detects the amount of air drawn into the cylinders and determines the amount of fuel to be injected to provide the optimum air/fuel ratio for all engine needs. Ignition Timing Control System This system automatically controls the ignition timing to reduce the amount of HC and NOx. Catalytic Converter Three Way Catalyst The catalyst is used to convert hydrocarbons (HC), carbon monoxide (CO) and oxides of nitrogen (NOx) in the exhaust gas, to carbon dioxide (CO), dinitrogen (N) and water vapor. 2 2 Exhaust Gas Recirculation (EGR) [California automatic models except EX Sedan] The EGR system is designed to control the formation of oxides of nitrogen (NOx) caused when fuel mixture burns at high temperature. It works by recirculating exhaust gas through the EGR valve and intake manifold into the combustion chambers where it reduces peak temperature by diluting the air/fuel mixture.

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year of production from: 1987

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