The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 22, 2001
Filed:
Dec. 07, 1999
John Lawrence Pawlak, III, Orchard Park, NY (US);
Sean Michael Kelly, Williamsville, NY (US);
Delphi Technologies, Inc., Troy, MI (US);
Abstract
An improved performance and cost-effective control for an automatic motor vehicle HVAC system in which the system variables are controlled without regard to a measured in-car temperature during steady-state conditions, and in which the steady-state control is modified during transient conditions by a time-dependent open-loop compensation term, INCAR. The initial value of INCAR, a target value and a time rate of change are initialized as a function of environmental and system conditions at the onset of the transient condition. At ignition key-on, INCAR is initialized in accordance with an estimate of the in-car temperature, and exponentially adjusted toward a predetermined reference temperature (target), such as 75°, at a rate determined by the initial temperature, preferably with adjustments being made for door opening and closing. At ignition key-off, INCAR is initialized at its current value, and exponentially adjusted toward a target temperature based on ambient air temperature and solar loading, to form a basis for in-car temperature initialization at the next ignition key-on. For extended key-off periods, system temperature sensors may be used to initialize INCAR.