Lothar Raff
23Patents
12h-index
24Co-inventors
81Inventor score
Filing activity: Mar 12, 1982 → Jul 9, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5267439A | Method and arrangement for checking the aging condition of a catalyzer | Emerging Cross-Sectional Technologies | 63 | Expired |
| US4419190A | Method and apparatus to measure the operating temperature of solid electrolyte-type gas sensors | Physics | 44 | Expired |
| US5224345A | Method and arrangement for lambda control | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US6245205A | Diagnostic arrangement for a potentiometric electrically heated exhaust-gas probe for controlling combustion processes | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US5298865A | Connecting circuit for connecting a lambda probe to a control apparatus of an internal combustion engine and test method for said circuit | Physics | 18 | Expired |
| US4756885A | Measuring sensor for determining the oxygen content in gases | Physics | 17 | Expired |
| US6131446A | Method and arrangement for diagnosing an exhaust-gas probe | Emerging Cross-Sectional Technologies | 16 | Expired |
| US4463594A | Wide-range temperature operating system for combustion gas oxygen sensor, and method | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US6073083A | Arrangement for determining the internal resistance of a lambda probe | Mechanical Engineering; Lighting; Heating | 13 | Expired |
| US5167120A | Method of controlling the temperature of an exhaust gas probe | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US5438826A | Method for adjusting the fuel/air mixture for an internal combustion engine after an overrun phase of operation | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US4594984A | Regulation device for the mixture composition of an internal combustion engine | Mechanical Engineering; Lighting; Heating | 12 | Expired |
| US5140535A | Process, use of the same and apparatus for lambda value detection | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US5307625A | Method and arrangement for monitoring a lambda probe in an internal combustion engine | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US6034610A | Method and arrangement for monitoring the operation of a gas probe | Physics | 10 | Expired |
| US5203165A | Method for the lambda control of an internal combustion engine having a catalyzer | Emerging Cross-Sectional Technologies | 9 | Expired |
| US7109721B2 | Method and electronic circuit for regenerating an electrical contact | Electricity | 8 | Expired |
| US5787867A | Lambda control method | Mechanical Engineering; Lighting; Heating | 8 | Expired |
| US5291417A | Method and arrangement for determining the internal resistance of a lambda probe and for the closed-loop heating control with the aid of the internal resistance | Mechanical Engineering; Lighting; Heating | 5 | Expired |
| US5036819A | Control system for the air/fuel ratio of an internal combustion engine | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US5209060A | Method for the continuous lambda control of an internal combustion engine having a catalyzer | Emerging Cross-Sectional Technologies | 3 | Expired |
| US5586543A | Mixture controller for an internal combustion engine | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US5291873A | Method and arrangement for determining a parameter of a lambda controller | Mechanical Engineering; Lighting; Heating | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.