Engine Protection Systems
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QB3 Systems:
PULSE INFORMATION SYSTEMS (PIS)
PIS is a multi-parameter protection system that uses the presence or absence of engine oil pressure to control fuel flow to the engine. PIS monitors oil pressure, coolant pressure, coolant temperature and automatic transmission fluid temperature in any combination using mechanical valves that are custom designed and manufactured to QB3 specifications.
These rigorous specifications allow the Pulse Information System to tolerate extreme physical conditions. If the value (temperature or pressure) of any of these parameters falls outside the designated ranges, the system is activated causing a fuel shut off or a fuel reduction.
PIS SYSTEM COMPONENTS
Fuel Valve - The fuel valve is maintained in the open state by the presence of 10 psi of oil pressure and closes at less than 10 psi. Lower or higher oil pressure settings are available. The fuel valve bypass is reduced flow and automatic or push-button electric override.
Temperature Valve - Custom manufactured using Vernet temperature sensor. The temperature valve is available in 210, 220, and 250 degree versions, adapts to coolant and transmission fluid. When the temperature exceeds the specification, the valve opens releasing PIS system oil pressure which closes the fuel valve.
Coolant Pressure Valve - Custom modified pressure sensing valve this valve is the finest pressure sensing valve in the industry. Pressurized coolant (adjustable psi) holds the valve closed. If the coolant pressure drops below the specification the valve opens and releases oil pressure causing the fuel valve to close.
Pop-up Indicators - Pop-ups provide visual diagnostics when the system is activated. When the temperature valve or water pressure valve opens the released oil passes through the pop-up indicator causing the red pin to pop-up, indicating the reason for shutdown. The pop-up indicators may then be reset by pushing the pin back in the original down position.
Test Valves - The QB3 test valves are unique to the industry and allow the PIS to be tested on a regular basis. In addition the test valves provide a readily accessible place to test coolant system pressure and integrity with minimal effort and readily available tools.
Remote Mounting Brackets - These allow the system components to be positioned according to the needs of the equipment or the user.
Oil Pressure Switch—the pressure switch is a top of the line Hobbs switch custom manufactured to QB3’s exact specifications, then custom calibrated by QB3 to fit the exact needs of any engine.
Wiring Harness - The QB3 wiring harness is custom built and designed to enhance installation and system use.
Instant Oil Pressure Shutdown - The most effective way to eliminate/reduce damage due to a detectable loss of oil pressure is with QB3 Instant Oil Pressure Shutdown incorporated with our Mechanical or Electronic Shutdown System.
PULSE SWITCH SYSTEMS (PSS)
Using the best available electronic switching devices, the QB3 Pulse Switch System monitors the following engine parameters: water temperature, water pressure, and oil pressure. In addition, we give you the option of monitoring automatic transmission temperature.
Using a custom made wiring harness; the QB3 PSS can provide any desired level of visual or audible warning or engine shutdown. Each monitored parameter can have its own visual warning to identify the cause of the system activation. The operator will be alerted to the presence of a problem and can take appropriate action.
PSS Diagnostic Controller - The PSS-DC is the latest advance in engine protection. Using state of the art, custom designed, integrated circuitry, and the controller provides audio and visual warning and diagnosis of engine trouble. In addition, the controller can provide engine shutdown. Warning or shutdown is at the option of the user and is determined at the time of installation.
PSS Temperature Switch - This switch is the finest Standard Products temperature switch available. When the PSS temperature switch is immersed in moving engine coolant, automatic transmission fluid, or hydraulic fluid a pre-specified increase in temperature beyond normal operating temperature will generate an electrical signal. This will cause a warning light to appear, an audible alarm to sound and/or a shutdown of the engine if desired.
PSS Water Pressure Switch - This switch from Stewart Warner/Hobbs accurately monitors coolant system pressure in the engine block, not in the radiator. Monitoring coolant system pressure in the engine block must be performed to assure that a rapid loss of coolant, which leaves the temperature switch high and dry, will not cause significant damage to the engine. When the QB3 Water Pressure Switch is installed, a loss of coolant system pressure in the engine block will generate a visual and audible warning as well as a shutdown if desired.
PSS Oil Pressure Switch - The PSS Oil Pressure Switch from Stewart Warner/Hobbs continuously monitors the presence of oil pressure. If the PSS Oil Pressure Switch senses a significant drop in oil pressure it generates an instantaneous visual and audible warning and/or engine shutdown.
The Exclusive PSS System Test Valves - These valves are unique to QB3 and provide a way to test the function of the system after installation and periodically. The PSS System Test Valves also provide a readily accessible port to perform cooling system pressure checks with available mechanic’s tools.
Instant Oil Pressure Shutdown - The most effective way to eliminate/reduce damage due to a detectable loss of oil pressure is with QB3 Instant Oil Pressure shutdown (incorporated with our Mechanical or Electronic Shutdown System).
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