US 6,981,411 B2
Measuring element for a flow rate sensor, in particular an air-mass flowsensor for internal combustion engines
Uwe Konzelmann, Asperg (Germany); and Tobias Lang, Stuttgart (Germany)
Assigned to Robert Bosch GmbH, Stuttgart (Germany)
Filed on May 21, 2004, as Appl. No. 10/851,593.
Claims priority of application No. 103 24 292 (DE), filed on May 21, 2003.
Prior Publication US 2004/0255667 A1, Dec. 23, 2004
Int. Cl. G01F 1/68 (2006.01)
U.S. Cl. 73—204.26 18 Claims
OG exemplary drawing
 
1. A measuring element for a flow rate sensor, comprising:
a ground terminal;
five additional terminals;
a reference temperature sensor for determining the ambient temperature, the reference temperature sensor being directly and electrically connected to the ground terminal and electrically connected to a first one of the five additional terminals;
a first heating resistor directly and electrically connected to the ground terminal and electrically connected to a second one of the five additional terminals;
a first temperature sensor directly and electrically connected to the ground terminal and electrically connected to a third one of the five additional terminals;
a second heating resistor directly and electrically connected to the ground terminal and electrically connected to a fourth one of the five additional terminals; and
a second temperature sensor directly and electrically connected to the ground terminal and electrically connected to a fifth one of the five additional terminals.