How does Autotherm® work?

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A Central Control Unit, located in the truck cab constantly monitors, vehicle engine operation, battery, engine coolant temperature, heater fan settings and other factors relating to AUTOTHERM® ERS operation and displays system status on a miniature dash sub-panel.

Once the AUTOTHERM® ERS is turned on at the beginning of the heating season, no switching or adjustments of any kind are needed to operate the ERS. The driver needs only to remember to turn the engine off whenever he stops for any length of time out of the traffic. The heater continues to operate at whatever setting the driver had it prior to the vehicle being turned off with no adjustment required except to make certain the fan speed is at the low or low-medium setting. The low fan setting will allow maximum warming time without triggering the ERS’s sensor that ends ERS operation to prevent battery rundown.

When the engine is turned off, no key is left in the vehicle. Instead the operator secures the vehicle by locking the doors. The operator can be gone for hours and return to a warm, snow and ice-free vehicle. If the operator is gone an extensive time-period, the system shuts itself off automatically when engine coolant temperature drops to a level where it can no longer impart 70 F interior temperature.

There is no need for the operator to be concerned that the ERS will run the battery down. The ERS automatically shuts down before battery voltage drops to levels that would make engine restart difficult.

System termination will also occur while coolant temperature is above the outside, ambient temperature. This means that the system will not circulate increasingly cooler air into the vehicle cab as the engine continues to cool to outside temperature levels.

The AUTOTHERM® ERS never cools the engine coolant down to the ambient temperature, and does not significantly increase cool-down speed over normal engine cool down speeds. What it does is redirect heat dissipation that would be lost to the atmosphere to the useful purpose of heating the cab. The vehicle operator benefits from increased comfort and safety, significant reduction in fuel consumption, reduced maintenance and increased engine life.

And environmentally conscious operators can feel good about conserving a diminishing natural resource and contributing to significant reductions in air pollution, both of which come from using the AUTOTHERM® ERS.

A Central Control Unit, located in the truck cab constantly monitors, vehicle engine operation, battery, engine coolant temperature, heater fan settings and other factors relating to AUTOTHERM® ERS operation and displays system status on a miniature dash sub-panel.

Once the AUTOTHERM® ERS is turned on at the beginning of the heating season, no switching or adjustments of any kind are needed to operate the ERS. The driver needs only to remember to turn the engine off whenever he stops for any length of time out of the traffic. The heater continues to operate at whatever setting the driver had it prior to the vehicle being turned off with no adjustment required except to make certain the fan speed is at the low or low-medium setting. The low fan setting will allow maximum warming time without triggering the ERS’s sensor that ends ERS operation to prevent battery rundown.

When the engine is turned off, no key is left in the vehicle. Instead the operator secures the vehicle by locking the doors. The operator can be gone for hours and return to a warm, snow and ice-free vehicle. If the operator is gone an extensive time-period, the system shuts itself off automatically when engine coolant temperature drops to a level where it can no longer impart 70 F interior temperature.

There is no need for the operator to be concerned that the ERS will run the battery down. The ERS automatically shuts down before battery voltage drops to levels that would make engine restart difficult.

System termination will also occur while coolant temperature is above the outside, ambient temperature. This means that the system will not circulate increasingly cooler air into the vehicle cab as the engine continues to cool to outside temperature levels.

The AUTOTHERM® ERS never cools the engine coolant down to the ambient temperature, and does not significantly increase cool-down speed over normal engine cool down speeds. What it does is redirect heat dissipation that would be lost to the atmosphere to the useful purpose of heating the cab. The vehicle operator benefits from increased comfort and safety, significant reduction in fuel consumption, reduced maintenance and increased engine life.

And environmentally conscious operators can feel good about conserving a diminishing natural resource and contributing to significant reductions in air pollution, both of which come from using the AUTOTHERM® ERS.

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