Temperature detection device for motor vehicle automatic transmission gearbox

摘要

In an automatic gearbox, a gearbox oil temperature sensor 3 and a starter-interlock contact switch 4 in a gearbox component 1 are connected to a gearbox control device 2 through a common signal line 5. The sensor 3 and switch 4 can be connected in series or parallel, the temperature information being received when the gearbox selector is moved to other than neutral or park positions. This closes switch 4 in the series arrangement shown but opens the switch when they are connected in parallel (Fig. 2). When the signal from the temperature sensor 3 is interrupted the control device 2 may use an engine coolant temperature signal instead. <IMAGE>