owners manual Volvo 940

owners manual Volvo 940 - year of production: 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998 - Volvo 940 owners manual EN

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text version of content this owner's manual page from owners manual to the vehicle Volvo 940, year of production 1990 - 1998:

1994 Volvo 940 Fuel system The fuel injection system is all-electronic and microprocessor-controlled. It can continually compensate for variations in engine load, speed and temperature to give the best economy and power. A mass air flow sensor or a pressure meter on certain models, measures the inducted air. In this way the system can make instantaneous adjustments for changes in air temperature or density, thus always assuring the best economy with the lowest possible exhaust emissions. Heated oxygen sensor This is an emission control system designed to reduce emissions and improve fuel economy. The heated oxygen sensor monitors the composition of the exhaust gases leaving the engine. The exhaust gas analysis is fed into an electronic control module. This adjusts the air-fuel ratio to provide optimum conditions for combustion and efficient reduction of the three major pollutants (hydrocarbons, carbon monoxide and nitrous gases) by a three-way catalytic converter. Pulsed Secondary Air Injection (certain models) This system adds air to the hot exhaust gases as they are expelled from the engine. This causes a secondary combustion of residual hydrocarbons and carbon monoxide, resulting in lower emissions levels in the exhaust gases. pg. 8:9 Servicing (cont.) Three-way Catalytic Converter file:///K|/ownersdocs/1994/1994_940/94940_8_7.html (3 of 7)12/30/2006 9:50:21 AM

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year of production from: 1990

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