The auxiliary AC system includes a temperature measurement device configured to generate a variable output based on an air temperature in an environment proximate to the AC system and a compressor control circuit communicably coupled to a variable speed motor. The compressor control circuit is configured to receive the variable output from the temperature measurement device, determine that the output indicates a change in the air temperature, and generate a control signal for the variable speed motor, the control signal including a current having a magnitude depending on the extent of the change to vary a rate at which a compressor pressurizes a refrigerant vapor.

The auxiliary AC system includes a temperature measurement device configured to generate a variable output based on an air temperature in an environment proximate to the AC system and a compressor control circuit communicably coupled to a variable speed motor. The compressor control circuit is configured to receive the variable output from the temperature measurement device, determine that the output indicates a change in the air temperature, and generate a control signal for the variable speed motor, the control signal including a current having a magnitude depending on the extent of the change to vary a rate at which a compressor pressurizes a refrigerant vapor.

An air conditioning and battery cooling assembly with an A/C coolant circuit and an E-drivetrain coolant circuit as well as a refrigerant circuit, wherein the A/C coolant circuit and the E-drivetrain coolant circuit are coupled together across a 4/2-way coolant valve in such a way that the A/C coolant circuit and the E-drivetrain coolant circuit can be operated separately or can receive a flow in serial manner.

A method for power management of a transport refrigeration system electrically connected to a utility power source. The method including determining an operating mode for the transport refrigeration system based on one or more of an amount of utility power available from the utility power source to the transport refrigeration system, a current cost of the utility power, and a noise or emission regulation for operating a prime mover. A transport refrigeration system unit that includes a transport refrigeration unit and a controller configured to receive power from a utility power source or a primary energy source. The controller also configured to determine an operating mode for the transport refrigeration system based on one or more of an amount of utility power available from the utility power source to the transport refrigeration system, a current cost of the utility power, and a noise or emission regulation for operating the prime mover.

Systems and methods for managing auto start of a vehicle during an auto-stop condition may include determining an operational status of a vehicle climate control system; receiving a target air outlet temperature from the vehicle climate control system; receiving data indicating a state of a heated seat of the vehicle; and inhibiting a start-vehicle command to restart the vehicle because of a cabin heating requirement when the data indicates that the heated seat of the vehicle is activated.

Methods and systems are provided for optimizing engine climate control performance and fuel economy in engines configured with start/stop capabilities. Climate control inhibits of start/stop actions are adjusted as a function of operator driving habits and climate control inputs and preferences. The approach enables climate performance to be improved while also allowing for frequent idle-stop operation.

A vehicular cooling device includes: a main cooling system including a compressor, a condenser, a liquid receiver, an expansion valve, an evaporator, a first refrigerant flow line connecting the compressor and the condenser, a second refrigerant flow line connecting the condenser and the liquid receiver, a third refrigerant flow line connecting the liquid receiver and the expansion valve, a fourth refrigerant flow line connecting the expansion valve and the evaporator, and a fifth refrigerant flow line connecting the evaporator and the compressor; and a sub-cooling system for enabling the refrigerant to flow to including the liquid receiver, the third refrigerant flow line, the expansion valve, the fourth refrigerant flow line, the evaporator, and a pre-cooling means disposed between the evaporator and the compressor, an absorbent tank storing an absorbent and a sixth refrigerant flow line connecting the absorbent tank to the fifth refrigerant flow line.

Embodiments of the present invention provide a refrigerant management system (10) in a heat flux management system (1) for an electric vehicle (150) and a method of refrigerant management, the system comprising a vehicle air conditioning circuit comprising a heat pump circuit (4) with a heating function and a refrigeration cycle refrigerant circuit (6), the air conditioning circuit comprising a heat pump condenser (17) in thermal communication with a heat source (19), a refrigerant evaporator (25) in thermal communication with the heat source (19), an evaporator (31) associated with an expansion valve (29), and a refrigerant compressor (11), wherein the components are fluidly connected to one another by a refrigerant line (9), an accumulator (37) fluidly coupled in the refrigerant line downstream of the heat pump condenser (17), the refrigerant evaporator (25) and evaporator (31) and upstream of the refrigerant compressor (11),

wherein the air conditioning circuit is switchable between a heating mode in which the heat pump circuit (4) is in fluid communication with the compressor (11) and the heat pump condenser (17) is isolated from fluid communication with the compressor (11) and a cooling mode wherein the refrigerant circuit (6) is in fluid communication with the compressor by actuation of at least one valve (15, 21, 41, 47);
wherein the air conditioning circuit comprises a sensor (39) at the compressor inlet (239) operable to monitor refrigerant temperature and pressure; and
wherein when the system is in the heating mode, a shut off valve 41 in line between the heat pump condenser (17) and the accumulator (37) is operable to open to initiate a cold start mode in which a temporary fluid communication is provided between the heat pump condenser (17) and the accumulator in the heat pump circuit when:
the sensor (39) detects one or both of: a superheated refrigerant at the compressor inlet (239) and a temperature gradient of more than 3 Kelvin between ambient (T3) and the compressor inlet (239).

The auxiliary AC system includes a temperature measurement device configured to generate a variable output based on an air temperature in an environment proximate to the AC system and a compressor control circuit communicably coupled to a variable speed motor. The compressor control circuit is configured to receive the variable output from the temperature measurement device, determine that the output indicates a change in the air temperature, and generate a control signal for the variable speed motor, the control signal including a current having a magnitude depending on the extent of the change to vary a rate at which a compressor pressurizes a refrigerant vapor.

Methods and systems are provided for optimizing engine climate control performance and fuel economy in engines configured with start/stop capabilities. Climate control inhibits of start/stop actions are adjusted as a function of operator driving habits and climate control inputs and preferences. The approach enables climate performance to be improved while also allowing for frequent idle-stop operation.