Abstract: A method of conditioning air in a vehicle load space. The method includes providing a refrigeration circuit including an evaporator, directing refrigerant through the refrigeration circuit, directing load space air across the evaporator, sensing a first condition based on one of a temperature and a pressure of the refrigerant in the refrigeration circuit upstream from the evaporator, determining a second condition based on one of a temperature and a pressure of the refrigerant in the evaporator, determining a difference between the first condition and the second condition, and initiating a defrost process of the evaporator when the difference is greater than a threshold.

Abstract: A display for a transport unit. The transport unit includes a trailer that defines a space with at least one zone, and a vehicle that is attachable to the trailer. The vehicle has a passenger compartment and a rear view mirror. A sensor is in communication with the transport unit and senses a parameter of the transport unit. The transport unit also includes a housing that is coupled to the trailer, and that has a display with a screen configured to display the parameter. A controller is attached to the trailer and is in communication with the space. The controller is in electrical communication with the sensor and the display, and the controller is programmed to selectively switch the display between a forward view mode and a mirror view mode based on a relationship between the vehicle and the trailer.

Abstract: A temperature control system for a container includes a refrigeration circuit having a primary fluid circulating therein and a secondary fluid circuit in communication with a first compartment of the container and a second compartment of the container. The secondary fluid circuit has a secondary fluid separate from the primary fluid circulating therein. The secondary fluid circuit includes a first heat exchange module in communication with an interior load space of the first compartment and a second heat exchange module in communication with an interior load space of the second compartment. Each of the first and second heat exchange modules includes a pump, a heater, a heat exchanger, and a three-way valve. A heat exchange interface between the refrigeration circuit and the secondary fluid circuit is operable to transfer heat from the secondary fluid to the primary fluid.

Abstract: An engine starter system that predicts when starter failure is imminent. The engine starter system monitors engine starter crank speed, battery voltage and ambient air temperature. The crank speed, battery voltage and ambient air temperature are communicated to a controller which compares the crank speed for the measured battery voltage and air temperature to a predicted crank speed for the measured battery voltage and air temperature. If the crank speed is lower than the predicted crank speed, a signal is sent to an alarm.

Abstract: A demand-based air conditioning system for a passenger vehicle that may utilize one or both of a contaminate sensor and a door sensor. A controller operates a damper to send an estimated amount of fresh air into a passenger compartment, based on the sensed level of contaminate in the passenger compartment, to ensure the air quality in the passenger compartment is acceptable for passengers.

Abstract: A transport unit including a container defining a cargo space. The transport unit includes position detection apparatus coupled to the container, and adapted to determine a geographic location of the container and to generate a signal indicative of the geographic location. The transport unit also includes a refrigeration system in communication with the cargo space, and a control system including route data that defines a plurality of potential destinations of the container. The control system is programmed to predict a container route defined by at least two potential destinations of the container based on the geographic location and the route data, and to determine a proximity of the container relative to at least one potential destination of the route. The control system is in communication with the refrigeration system to control the refrigeration system based on the proximity of the container relative to the at least one potential destination.

Abstract: A multi-zone transport refrigeration system. The system includes a compressor, a condenser, a refrigerant circuit, a first temperature control zone and a second temperature control zone. A controller is configured to identify a priority zone and a non-priority zone based upon a first magnitude of a difference between a first temperature set point and a first zone temperature derived from the first air temperature sensor, and a second magnitude of a difference between the second temperature set point and a second zone temperature derived from the second air temperature sensor. A non-priority zone is isolated from the refrigerant circuit for a pre-defined period in order to maximize a refrigerant flow to the priority zone.

Abstract: A refrigerant compressor assembly for a refrigeration circuit controls the temperature within a temperature controlled space. The refrigerant compressor assembly includes a first unloading valve, a first valve actuator, and a first valve control system that adjusts the first valve actuator via a pulse-width-modulated signal, a second unloading valve, a second valve actuator, and a second valve control system that adjusts the second valve actuator via a pulse-width-modulated signal. The refrigerant compressor assembly also includes a third unloading valve. The first valve actuator is coupled to the first and third unloading valves and controlled by the first valve control system. The unloading valves selectively allow or resist fluid flow from higher to lower pressure areas within the refrigerant compressor assembly.

Abstract: An environment control unit including an environment control system, a reactive oxygen species (ROS) generator, and a controller. The refrigeration system and the ROS generator positioned within a housing of the environment control unit and providing conditioned air to the interior of a cargo space to clean and condition air and surfaces within the cargo space.

Abstract: A display for a transport unit. The transport unit includes a trailer that defines a space with at least one zone, and a vehicle that is attachable to the trailer. The vehicle has a passenger compartment and a rear view mirror. A sensor is in communication with the transport unit and senses a parameter of the transport unit. The transport unit also includes a housing that is coupled to the trailer, and that has a display with a screen configured to display the parameter. A controller is attached to the trailer and is in communication with the space. The controller is in electrical communication with the sensor and the display, and the controller is programmed to selectively switch the display between a forward view mode and a mirror view mode based on a relationship between the vehicle and the trailer.

Abstract: A method of operating a transport refrigeration unit that is operable to regulate a temperature of a cargo space. The method includes providing a controller, driving a refrigerant compressor of the transport refrigeration unit with an internal combustion engine to compress a refrigerant defining an engine operating state of the transport refrigeration unit, and driving the refrigerant compressor of the transport refrigeration unit with an electric motor to compress the refrigerant defining a motor operating state of the transport refrigeration unit. The method further includes sensing the temperature of the cargo space, receiving into the controller a signal indicative of the temperature of the cargo space, determining the temperature of the cargo space using the controller, and switching between the engine operating state and the motor operating state in response to a signal generated by the controller based on the temperature of the cargo space.

Abstract: An exhaust system for use with a diesel engine includes a diesel particulate filter configured to capture particulate matter exhausted from the diesel engine, a first sensor operable to detect a particulate matter accumulation level within the diesel particulate filter, and a second sensor operable to detect an ambient temperature of an environment surrounding the diesel particulate filter. The exhaust system also includes a control module electrically coupled to the first sensor, the second sensor, and the diesel particulate filter. The control module is operable to adjust a first regeneration threshold based on the detected ambient temperature. The control module is also operable to initiate regeneration of the diesel particulate filter when the detected particulate matter accumulation level reaches the first regeneration threshold.

Abstract: A system for sanitizing products on a conveyor including a conveyor for moving products along a direction of conveyance. A first generator and a second generator are each operable to generate airborne sanitizing agents. The first generator includes an outlet configured to discharge at least a portion of the airborne sanitizing agents generated therein across the conveyor in a first direction. The second generator includes an outlet configured to discharge at least a portion of the airborne sanitizing agents generated therein across the conveyor in a second direction. The outlet of the first generator is configured to direct the discharged airborne sanitizing agents toward an inlet of the second generator.

Abstract: A vehicle that includes a frame, a prime mover, an alternator, a cabin, a HVAC system, and a power source. The prime mover is operable in a first mode that is configured for driving the vehicle and a second mode that is configured for standby operation of the vehicle. The cabin includes walls that define a space and that have insulation to insulate the space. The HVAC system is in communication with the cabin to condition the space, and includes a cooling system, a heating system, and a sorption system that dehumidifies air provided to the space. The power source has a battery that is in electrical communication with the alternator and the HVAC system to supply power to the HVAC system from the battery when the prime mover is in the first mode and when the prime mover is in the second mode.

Abstract: A refrigeration system configured for use with a trailer including a container having a roof, a first sidewall, and a second sidewall. The refrigeration system includes a refrigeration unit configured to couple to the trailer and operable to condition the container. The refrigeration system also includes a duct in fluid communication between the refrigeration unit and an opening in the first sidewall. The duct is configured to direct an airflow in at least one of a first direction toward the refrigeration unit and a second direction away from the refrigeration unit.

Abstract: A transport refrigeration system for a transportable temperature controlled space includes a compressor, a condenser and an evaporator fluidly connected to one another, an engine operatively connected to the compressor, and a fuel tank assembly fluidly connected to the engine. The fuel tank assembly includes a fuel tank configured to contain the fuel, a fuel vapor and air, and an ultrasonic fluid level sensor for sensing a level of fuel, the fuel tank having a maximum fuel level. The fluid level sensor includes a transducer having a ring period. The distance from the fluid level sensor to the maximum fuel level is at least half the distance that the sound travels through the fuel vapor and air during the ring period of the transducer.

Abstract: A temperature-controlled vehicle including a cascade refrigeration system having a booster cooling line configured to supplement the cooling capacity of the cascade refrigeration system by expanding and venting a portion of a cryogenic refrigerant to the atmosphere during peak demands while the cascade refrigeration system continues to operate.

Abstract: A display for a transport unit. The transport unit includes a vehicle, a trailer that defines a space, and a sensor that is in communication with the transport unit and that senses a parameter of the transport unit. The display unit includes a housing that is attachable to the trailer, and a display portion coupled to the housing. The display portion includes a screen configured to display the parameter. A controller is in electrical communication with the display portion to display the parameter on the screen. The controller is programmed to selectively switch the screen between a forward view mode and a mirror view mode such that the parameter is readable on the screen from outside the vehicle and from inside the vehicle based on a relationship between the vehicle and the trailer.

Abstract: A method for freeze protection for a temperature control system, and a temperature control system for controlling the temperature of a temperature-controlled space at a set point temperature. The method includes monitoring a discharge air temperature, monitoring a return air temperature, setting a target temperature to equal the set point temperature, controlling the return air temperature at the target temperature, and adjusting the target temperature based on the return air temperature when the discharge air temperature drops to one of at or below freezing.