Nartron Corporation

Christian J Andersen

Ronald D Ingraham

David W Bull

Duane W Gebauer

Gregory E Peterson

A method and system for controlling a refrigeration system is operative to reduce a system pressure of the refrigeration system. The system pressure is reduced to reduce a start-up current associated with a compressor motor of the refrigeration system. Another method and system for controlling a refrigeration system includes steps of performing an operation of the refrigeration system in accordance with at least one parameter, sensing an amount of energy utilized in at least a portion of the refrigeration system to perform the operation, and modifying the at least one parameter to reduce the amount of energy required to subsequently perform the operation.

Methods and systems for controlling a refrigeration system

A warning module for use with a motor vehicle having multiple sensor inputs and multiple sensor outputs. The inputs are coupled to sensing circuits for monitoring a condition such as engine temperature. The outputs are coupled to one or more light bulbs or other visual indicators which are activated at a lamp flash frequency. A variable frequency oscillator activates an audible output device, preferably a piezoelectric buzzer. The light output levels are diminished for nighttime use. A plastic housing supports a piezo-electric transducer and reverberation plate and achieves a high sound output.

Failsafe module

A protective control box is disclosure for providing protection for a starter system and other components of equipment, such as vehicles, incorporating internal combustion engines. Improved starter protection apparatus and circuitry using frequency to voltage conversion disables a starter motor from starting the internal combustion engine when engine speed exceeds a pre-determined level. The starter cannot be re-actuated until and unless engine speed has fallen below a second lower pre-determined speed level. The protection box includes a lockout solenoid which in turn selectively locks out the main starter solenoid in accordance with the foregoing conditions. A wait-to-start lamp and associated comparator and latching circuitry is provided for actuating the wait lamp in response to initiation of glow plug controller pre-glow operation, and for subsequently extinguishing the lamp. Once extinguished, the lamp cannot be re-actuated until and unless the ignition has been toggled. Circuitry including a field effect transistor is provided for controlling glow plug controller operation by means of an auxiliary solenoid. Load dump control circuitry responsive to frequency to voltage conversion inhibits disconnection of electrical loads from a motor-driven alternator even when the ignition is turned off, until engine speed has dropped to a safe level. This prevents voltage spikes which would otherwise result from the sudden unloading of the alternator, a phenomenon which could damage a voltage regulator or other electrical circuitry. After-glow control maintains glow plug controller operation until ambient engine temperature has reached a pre-determined level.

Vehicle starter and electrical system protection

A warning module for use with a motor vehicle having multiple sensor inputs and multiple sensor outputs. The inputs are coupled to sensing circuits for monitoring a condition such as engine temperature. The outputs are coupled to one or more light bulbs or other visual indicators which are activated at a lamp flash frequency. A variable frequency oscillator activates an audible output device, preferably a piezo-electric buzzer. The light output levels are diminished for nighttime use. A plastic housing supports a piezo-electric transducer and reverberation plate and achieves a high sound output.

A protective control box is disclosed for providing protection for a starter system and other components of equipment, such as vehicles, incorporating internal combustion engines. Improved starter protection apparatus and circuitry using frequency to voltage conversion disables a starter motor from starting the internal combustion engine when engine speed exceeds a pre-determined level. The starter cannot be re-actuated until and unless engine speed has fallen below a second lower pre-determined speed level. The protection box includes a lockout solenoid which in turn selectively locks out the main starter solenoid in accordance with the foregoing conditions. A wait-to-start lamp and associated comparator and latching circuitry is provided for actuating the wait lamp in response to initiation of glow plug controller pre-glow operation, and for subsequently extinguishing the lamp. Once extinguished, the lamp cannot be re-actuated until and unless the ignition has been toggled. Circuitry including a field effect transistor is provided for controlling glow plug controller operation by means of an auxiliary solenoid. Load dump control circuitry responsive to frequency to voltage conversion inhibits disconnection of electrical loads from a motor-driven alternator even when the ignition is turned off, until engine speed has dropped to a safe level. This prevents voltage spikes which would otherwise result from the sudden unloading of the alternator, a phenomenon which could damage a voltage regulator or other electrical circuitry. Afterglow control maintains glow plug controller operation until ambient engine temperature has reached a pre-determined level.

Growing community of inventors

Cadillac, MI, United States of America

Christian J Andersen