Process and apparatus for determination and utilization of a quantity of preheating energy

Patent · Tue Mar 13 04:00:00 EST 1984

OSTI ID:6461881

Lamkewitz, F; Riedmaier, J

A preheating process and apparatus for determination and utilization of a quantity of preheating energy so as to automatically achieve a desired temperature at a given location prior to a predetermined period of usage, especially for preheating an automotive vehicle. In accordance with the process, the respective preheating times required to achieve a desired temperature for various possible actual conditions at the location of usage are determined and stored, at a predetermined point of time prior to the usage commencement time, the correct preheating time is determined from the stored preheating times based upon actual temperature conditions and application of heat to the location is automatically commenced at a time prior to the usage commencement time that corresponds to the difference between the usage commencement time and the correct preheating time determined previously. In accordance with a preferred embodiment of the apparatus, a preset-table timer actuated switching control means is provided for actuating a heating device. An actual temperature value sensor means is utilized to sense the actual temperature at the location to be preheated and is used to address a memory unit containing, as stored data, preheating times to be read out that correspond to the respectively required heating time to achieve a desired temperature for each of various possible actual temperatures at the location. The stored preheating time read out by the memory unit based upon actual temperature value sensed by the sensor means at a point of time prior to the preset usage commencement time is utilized by the switching control means to actuate the heating device at a time prior to a preset time for commencement of usage that corresponds to the difference between the preset usage commencement time and the time read out by the memory unit.

• Assignee: Webasto-Werk W. Baier GmbH and Co. (Germany, Federal Republic of)
• Patent Number(s): US 4436064
• OSTI ID: 6461881
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330100* -- Internal Combustion Engines
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
ACTUATORS
AUTOMOBILES
COMPUTERIZED CONTROL SYSTEMS
CONTROL
CONTROL SYSTEMS
ELECTRICAL EQUIPMENT
ENGINES
EQUIPMENT
HEAT ENGINES
HEATERS
HEATING
INTERNAL COMBUSTION ENGINES
MEASURING INSTRUMENTS
MEMORY DEVICES
SWITCHES
TEMPERATURE CONTROL
THERMOMETERS
TIME MEASUREMENT
VEHICLES