Control systems, especially for heating, ventilating and/or air conditioning installations for motor vehicles
First Claim
1. A control system for a vehicle heating and ventilating installation, the control system including setting and visualising means for permitting a user of the vehicle to define a set of parameters for required running atmospheric conditions, and processing means connected with the setting and display means for converting the values of parameters of the said set into adjustment values for application to working parts of the installation, whereby to adjust the latter in accordance with adjustment criteria, wherein the system includes management means for issuing a blocking command, the processing means further including locking means responsive to said blocking command for overriding, with priority, said adjustment values, the setting and display means further including means accessible to the user for commanding said management means to issue a said blocking command, whereby the adjustment values prevailing at the instant of blocking action are preserved regardless of any changes in the atmospheric changes in the vehicle.
1 Assignment
0 Petitions
Accused Products
Abstract
The control means includes a keypad and display unit which is connected to a processing means which includes a user or input memory, a regulation unit for receiving sensed values of parameters, and an output memory for controlling the means whereby the various working parts of the installation are themselves controlled. Regulation of the installation by the control system can be overridden by operation of a special touch pad which acts on an automatic processing circuit, which delivers a blocking command to the output memory, thus "freezing" the contents of the latter. The automatic processing circuit also operates in this way when the ignition key is turned to energise the installation initially. The frozen or blocked mode can be cancelled by operating any of the touch controls on the keypad.
15 Citations
8 Claims
- 1. A control system for a vehicle heating and ventilating installation, the control system including setting and visualising means for permitting a user of the vehicle to define a set of parameters for required running atmospheric conditions, and processing means connected with the setting and display means for converting the values of parameters of the said set into adjustment values for application to working parts of the installation, whereby to adjust the latter in accordance with adjustment criteria, wherein the system includes management means for issuing a blocking command, the processing means further including locking means responsive to said blocking command for overriding, with priority, said adjustment values, the setting and display means further including means accessible to the user for commanding said management means to issue a said blocking command, whereby the adjustment values prevailing at the instant of blocking action are preserved regardless of any changes in the atmospheric changes in the vehicle.
Specification