Lothar Raff | Researchain

Archive Network Publication Hotspot Collaboration

Hotspot

Bubble
[Coming Soon]

Cloud

Mosaic
[Coming Soon]

SAE transactions | 1984

Heated zirconia oxygen sensor for stoichiometric and lean air-fuel ratios

Hans-Martin Wiedenmann; Lothar Raff; Rainer Noack

This publication describes the design and operation of an electrically heated ZrO/sub 2/ sensor and demonstrates its advantages in comparison to the present unheated sensor in a lambda = 1 system. Control ability down to very low exhaust temperatures, minimized temperature dependence and reduced aging effects result in lower emissions with the heated sensor. The application advantages in a lambda = 1 system are discussed. The second part of the paper describes the properties of this heated sensor for measurement of lean exhaust gas. The lambda-range 1.0 to 1.5 can be covered without any additional temperature compensation with sufficient accuracy and stability over life time.

Archive | 1991

Method and arrangement for checking the aging condition of a catalyzer

Lothar Raff; Eberhard Schnaibel

Archive | 1982

Method and apparatus to measure the operating temperature of solid electrolyte-type gas sensors

Hermann Dietz; Ferdinand Grob; Klaus Muller; Lothar Raff; Franz Rieger; Hans-Martin Wiedenmann

Archive | 1997

Exhaust gas probe diagnosis method for IC engine

Eberhard Schnaibel; Lothar Raff; Claus-Peter Pflieger

Archive | 1971

PULSE GENERATOR FOR CONTROLLING THE VALVES OF AN INTERNAL COMBUSTION ENGINE

Peter Schmidt; Lothar Raff

Archive | 1992

Connecting circuit for connecting a lambda probe to a control apparatus of an internal combustion engine and test method for said circuit

Helmut Denz; Werner Mezger; Johannes-Dieter Wichterich; Ernst Wild; Joachim Heimes; Eugen Joos; Lothar Raff; Eberhard Schnaibel

Archive | 1998

Method and arrangement for diagnosing an exhaust-gas probe

Eberhard Schnaibel; Lothar Raff; Claus-Peter Pflieger

Archive | 1993

Method for adjusting the fuel/air mixture for an internal combustion engine after an overrun phase of operation

Frank Blischke; Klaus Hirschmann; Lothar Raff; Eberhard Schnaibel

Archive | 1989

METHOD AND ARRANGEMENT FOR LAMBDA CONTROL

Eberhard Schnaibel; Lothar Raff; Gunther Plapp; Cornelius Peter; Michael Westerdorf

Archive | 1982

Wide-range temperature operating system for combustion gas oxygen sensor, and method

Lothar Raff; Hans-Martin Wiedenmann

Explore More