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Dive into the research topics where Johann Kirchhoffer is active.

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Featured researches published by Johann Kirchhoffer.


ATZ worldwide | 2004

The development method of the new CFT23 continuously variable transmission from ZF

Wolfgang de Loth; Johann Kirchhoffer; Hans-Peter Wirtz

ZF developed in cooperation with Ford a continuously variable automatic transmission, the CFT23 Ecotronic, which is used in the new Ford and Volvo-C platform derivatives. The Ford Focus C-MAX with a turbocharged 1.6 liter diesel engine is the first model from this product range to be produced. This report describes the development method and uses the results gained from the CFT23 development to describe this more specifically. This is supplemented by examples taken from the CFT23 Reliability Demonstration Matrix.


ATZ - Automobiltechnische Zeitschrift | 2004

Die Entwicklungsmethode des neuen stufenlosen Automatikgetriebes CFT23 von ZF

Wolfgang de Loth; Johann Kirchhoffer; Hans-Peter Wirtz

ZF entwickelte gemeinsam mit Ford das stufenlose Automatikgetriebe CFT23 Ecotronic, das in den neuen Ford- und Volvo-C-Platform- Derivaten zur Anwendung kommt. Erstes Modell im Rahmen dieser Palette ist der Ford Focus C-MAX mit einem turboaufgeladenen 1,6-l-Dieselmotor. Der vorliegende Bericht beschreibt die Entwicklungsmethode und konkretisiert sie anhand der erzielten Resultate aus der CFT23-Entwicklung. Zur Erganzung dienen Beispiele aus der CFT23-Reliability-Demonstration-Matrix.


Archive | 1995

Shift control system for a multiple ratio automatic transmission

Winfried Schulz; Johann Kirchhoffer


Archive | 1996

Multiple ratio automatic transmission and torque converter

Johann Kirchhoffer; Thomas Martin; Eric Reichert; Werner Croonen; Thomas Wagner; Wolfgang Wickler


Archive | 1990

Control system for a hydrokinetic torque converter lock-up clutch

Wolfgang Von Der Lippe; Sieghart Biederman; Winfried Schulz; Hans-Peter Wirtz; Johann Kirchhoffer


Archive | 1995

Multiple ratio automatic transmission with solenoid operated valves for effecting pressure buildup

Winfried Schulz; Johann Kirchhoffer


Archive | 1997

Multiple ratio transmission with swap-shift controls

Winfried Schulz; Johann Kirchhoffer; Stefan Huepkes


Archive | 1996

Multiple ratio transmission having swap-shift controls with optimum ratio upshifts

Winfried Schulz; Johann Kirchhoffer; Stefan Huepkes


Archive | 1997

Swap-shift control system for a multiple ratio transmission

Johann Kirchhoffer; Thomas Martin; Eric Reichert; Werner Croonen; Thomas Wagner; Wolfgang Wickler


Archive | 1998

Automatic shift control system for an automatic transmission including a select-shift manual control

Johann Kirchhoffer; Werner Croonen; Eric Reichert; Thomas Wagner; Scott Raymond Crandall; Robert Cary Haase

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