Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Exhaust gas recirculation system for internal combustion engine










Image Number 2 for United States Patent #4870941.

An automotive vehicle is equipped with an exhaust gas recirculation system in which a part of exhaust gas is recirculated back to the combustion chambers of the engine. The exhaust gas recirculation system is comprised of an EGR passage through which the exhaust gas flows. An EGR valve is disposed in the EGR passage to control the amount of the recirculated exhaust gas. A temperature sensor is disposed in the EGR passage upstream of the EGR valve to detect the temperature of the recirculated exhaust gas flowing through the EGR passage and output a signal representing the exhaust gas temperature. The signal is input to a control unit which is arranged to cause a warning lamp to light when the exhaust gas temperature detected by the temperature sensor is below a predetermined level, thus achieving diagnosis of abnormality in the exhaust gas recirculation system such as clogging of the EGR passage and failed operation of the EGR valve while preventing thermal damage of the temperature sensor.








 
 
  Recently Added Patents
Agglutination judgment method
Reading apparatus and reading method
Flood protection apparatus and container data center including the same
Toner cartridge and image forming apparatus including the same
Shape based similarity of continuous wave doppler images
User interface for integrating applications on a mobile communication device
Mobile phone
  Randomly Featured Patents
Preparation of platelet analogs
Semiconductor device having input buffer with reduced bias voltage variations and low power consumption
Lenticular image product with zoom image effect
Room-temperature, flashpumped, 1.96 micron solid state laser
Surveyor's marker
Modular shelter
Liquid discharge head and its manufacturing method
Method of manufacturing liquid crystal display apparatus and manufacturing device therefor
Spring structure of a multi-joint luggage pull-rod
Catalyst for producing methacrylic acid and preparation method thereof