An idle control system for a vehicle is provided.

A vehicular cooling device capable of instant cooling, includes: a main cooling system including a compressor, a condenser, a liquid receiver, an expansion valve and an evaporator which are connected for circulating a refrigerant, and an instant cooling system for enabling the refrigerant to flow to the liquid receiver, the expansion valve, the evaporator and a pre-cooling means disposed between the evaporator and the compressor, wherein the vehicular cooling device is capable of instantly cooling an inside of the vehicle by enabling the refrigerant not to circulate through a line of the main cooling system when the instant cooling system operates, and enabling the refrigerant stored in the liquid receiver to flow to the pre-cooling means via the evaporator due to pressure difference between the liquid receiver and the pre-cooling means.

A control device for a vehicle includes an electronic control unit. The electronic control unit is configured to: execute first automatic stop control for automatically stopping an engine when a first condition is established during traveling of the vehicle; execute second stop control for automatically stopping the engine when a second condition is established during stop of the vehicle; predict a vehicle stop duration; calculate a required cold and heat storage amount of an evaporator; calculate a reaching time until a cold and heat storage amount of the evaporator reaches the required cold and heat storage amount; predict a time needed for vehicle stop; and when the first condition is established during traveling of the vehicle, in a case where the calculated reaching time is equal to or longer than the predicted time needed for vehicle stop, automatically stop the internal combustion engine during traveling of the vehicle.

A vehicle air conditioner includes a refrigeration cycle unit, a heater core, a cool air bypass passage, an air volume ratio regulator, and an auxiliary heat exchanger. The heater core is disposed in a heating passage located downstream of an evaporator with respect to an airflow. The auxiliary heat exchanger is provided in the refrigeration cycle unit. The evaporator includes a cold energy storage configured to store cold energy. The cold energy storage stores cold energy when the compressor is in operation, and dissipate cold energy while the compressor stops. The auxiliary heat exchanger is located downstream of the evaporator and upstream of the heater core with respect to the airflow. The auxiliary heat exchanger is configured to change enthalpy of refrigerant by heat exchange between the refrigerant and air having been cooled by the evaporator and to be heated by the heater core.

A hybrid electric vehicle (HEV) that includes an internal combustion engine and a climate control system (CCS) coupled to controllers configured to auto start-stop the engine when the HEV decelerates to an engine-stop threshold speed. The controllers are also configured to adjust a climate-fan-speed by a predetermined initial-factor, and at subsequent timed-intervals with a speed-factor that is adjusted from the initial-factor at each timed-interval, such that engine restart is inhibited by perceptually small speed adjustments and perceptually slow timed-interval cabin cooling adjustments. Such gradual adjustments are tuned to increase passenger perceptions of continuing cabin comfort, which reduce the likelihood that a passenger may adjust the CCS to require engine restart, and to increase auto stop-start fuel economy. In variations, the controllers are further configured to slowly/gradually step-down the climate-fan-speed when the speed is above a predetermined mid-speed, and to slowly/gradually step-up the climate-fan-speed when it is below a predetermined mid-speed.

A vehicle heating, ventilating, and air conditioning (HVAC) system can be configured for operation in a vehicle having a start-stop system. The start-stop system can automatically switch a vehicle engine between ON and OFF states to save fuel economy. A compressor within the HVAC system can be controlled based on a request to switch the engine from an OFF state to an ON state. It can be determined whether an air conditioning system is in an active state, whether the engine is in an OFF state due to the start-stop system, whether there is an engine OFF cancel request to switch the engine to an ON state, and whether the engine OFF cancel request is due to an HVAC request. If the engine OFF cancel request is not due to an HVAC request, the engine can be switched to an ON state while the compressor remains in an OFF state.

Air conditioning systems and methods for a vehicle having a start-stop engine system. The systems and methods cool the vehicle's passenger cabin when the vehicle's engine and air conditioning compressor are off.

A vehicle air conditioner has a compressor, a radiator, a pressure reducer, a cooling heat exchanger, a temperature detector, and a prohibition request output part. The compressor draws and discharges a refrigerant. The radiator dissipates heat of the refrigerant. The pressure reducer decompresses and expands the refrigerant. The cooling heat exchanger cools an air blown into a vehicle compartment. The temperature detector detects a temperature of the cooling heat exchanger. The prohibition request output part outputs a request, which prohibits the idle stop control, to an idle stop controller when the engine is operated. The request prohibits the idle stop control until the temperature of the cooling heat exchanger falls to a temperature being enough cool to cool the air and a required cooling time elapses. The required cooling time is estimated to be required to make a passenger feel cool by the air.

A refrigeration unit and a method for controlling same during start-stop operation is provided. The refrigeration unit may include an engine operable between at least a low engine speed and a high engine speed, a compressor operatively coupled to the engine, and a controller operatively coupled to each of the engine and the compressor. The controller may be configured to operate the engine at a reduced low speed during a delay period, extend the delay period based on the reduced low speed, increase a displacement capacity of the compressor based on the extended delay period, and operate the engine at a reduced high speed.

A mobile hybrid electric temperature-controlled system connected to a vehicle, such as a vehicle-transported refrigeration system, includes a power management system and an energy storage module. The power management system and energy storage module can manage power delivered to the temperature-controlled system components by monitoring temperatures and voltages (and possibly other factors) and by delivering power as a function of the things monitored. In a typical implementation the power management system and an energy storage module can supply power to a vehicle-transported refrigeration system when the vehicle is stopped and/or power from the vehicle electrical system is electrically isolated or otherwise unavailable.