Control unit for controlling traveling state and air conditioning state

Patent metadata

Field	Value
Publication number	US-11511728-B2
Application number	US-201916259003-A
Country	US
Kind code	B2
Filing date	Jan 28, 2019
Priority date	Jan 29, 2018
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

Abstract

A control unit that controls a travelling state and an air conditioning state of a vehicle includes: a drive control unit performing a vehicle speed control and a power train control, the vehicle speed control selectively executing an acceleration operation where an engine mounted on the vehicle is operated and a deceleration operation where the engine is stopped to allow the vehicle to coast, the power train control selectively executing activation or deactivation of the engine; m and an air conditioning control unit that controls an air conditioning system provided in the vehicle to execute an air conditioning control. A content of control is changed for at least one of the vehicle speed control, the power train control and the air-conditioning control while the air conditioning system is operating, compared to a case where the air conditioning system is not operating.

First claim

What is claimed is:

1. A control unit that controls a travelling state and an air conditioning state of a vehicle comprising:
a drive control unit performing a vehicle speed control and a power train control, the vehicle speed control selectively executing an acceleration operation where an engine mounted on the vehicle is operated and a deceleration operation where the engine is stopped to allow the vehicle to coast, the power train control selectively executing activation or deactivation of the engine; and
an air conditioning control unit that controls an air conditioning system provided in the vehicle to execute an air conditioning control, wherein
a condition of control is changed maintaining the control thereof, for at least one of the vehicle speed control, the power train control and the air-conditioning control while the air conditioning system is operating, compared to a case where the air conditioning system is not operating,
the air conditioning control is executed while the air conditioning system is operated without stopping an air conditioning function, regardless of the vehicle speed control and the power train control,
the drive control unit is configured to change a target acceleration factor in the vehicle speed control, and
the drive control unit is configured to perform the vehicle speed control, while the air conditioning system is operating in a heating mode, such that the lower a temperature of cooling water temperature of the engine, the smaller the target acceleration factor, or such that the larger a heat capacity necessary for operating the air conditioning system, the smaller the target acceleration factor.

2. The control unit according to claim 1 , wherein
the drive control unit is configured to lower the target acceleration factor in the vehicle speed control while the air conditioning system is operating.

3. The control unit according to claim 1 , wherein
the vehicle includes a power generation apparatus mounted thereon;
the drive control unit is configured to increase power generated by the power generation apparatus while the air conditioning system is operating in the heating mode.

4. The control unit according to claim 1 , wherein
the drive control unit is configured to disable stopping of the engine in the vehicle speed control and the power train control, while the air conditioning system is operating in the heating mode and an amount of stored energy used for the heating is less than a predetermined amount, or a temperature increase request to the air conditioning system is larger than a predetermined request value.

5. The control unit according to claim 4 , wherein
the drive control unit is configured to determine that an amount of the stored energy is less than a predetermined amount when a temperature of cooling water of the engine is less than a predetermined temperature.

6. The control unit according to claim 1 , wherein
the drive control unit is configured to disable stopping of the engine in the power train control while the air conditioning system is operating in the cooling mode, when one of following conditions is satisfied:
(condition 1) an amount of energy utilized for the cooling mode is larger than a predetermined amount;
(condition 2) a temperature of the refrigerant sent to the evaporator included in the air conditioning system is higher than a predetermined temperature; and
(condition 3) a temperature decrease requirement to a cooling request is larger than a predetermined amount.

7. The control unit according to claim 6 , wherein
the air conditioning system includes a cold storage device performing a cold storage when a compressor included in the air conditioning system is in operation and releasing cold when the compressor is stopped; and
the drive control unit is configured to determine the condition 1 including the temperature of the cold storage device.

8. A control unit that controls a travelling state and an air conditioning state of a vehicle comprising:
a drive control unit performing a vehicle speed control and a power train control, the vehicle speed control selectively executing an acceleration operation where an engine mounted on the vehicle is operated and a deceleration operation where the engine is stopped to allow the vehicle to coast, the power train control selectively executing activation or deactivation of the engine; and
an air conditioning control unit that controls an air conditioning system provided in the vehicle to execute an air conditioning control, wherein
a condition of control is changed maintaining the control thereof, for at least one of the vehicle speed control, the power train control and the air-conditioning control while the air conditioning system is operating, compared to a case where the air conditioning system is not operating,
the air conditioning control is executed while the air conditioning system is operated without stopping an air conditioning function, regardless of the vehicle speed control and the power train control,
the drive control unit is configured to change a target acceleration factor in the vehicle speed control, and
the drive control unit is configured to control the target acceleration factor in the vehicle speed control while the air conditioning system is operating in a cooling mode, such that the higher a temperature of refrigerant sent to an evaporator in the air conditioning system, the lower the target acceleration factor in the vehicle speed control, or such that the larger an amount of a temperature decrease requirement to the air conditioning system, the lower the target acceleration factor in the vehicle speed control.

9. The control unit according to claim 8 , wherein
the air conditioning system includes a cold storage device performing a cold storage when a compressor included in the air conditioning system is in operation and releasing cold when the compressor is stopped; and
the air conditioning control unit together with the vehicle speed control of the drive control unit increases a drive power of the compressor.

10. The control unit according to claim 8 , wherein
the drive control unit is configured to lower the target acceleration factor in the vehicle speed control while the air conditioning system is operating.

11. The control unit according to claim 8 , wherein
the drive control unit is configured to disable stopping of the engine in the vehicle speed control and the power train control, while the air conditioning system is operating in a heating mode and an amount of stored energy used for the heating is less than a predetermined amount, or a temperature increase request to the air conditioning system is larger than a predetermined request value.

12. The control unit according to claim 11 , wherein
the drive control unit is configured to determine that the amount or stored energy is less than a predetermined amount when a temperature of cooling water of the engine is less than a predetermined temperature.

13. The control unit according claim 8 , wherein
the drive control unit is configured to disable stopping of the engine in the power train control while the air conditioning system is operating in the cooling mode, when one of following conditions is satisfied:
(condition 1) an amount of energy utilized for the cooling mode is larger than a predetermined amount;
(condition 2) a temperature of the refrigerant sent to the evaporator included in the air conditioning system is higher than a predetermined temperature; and
(condition 3) a temperature decrease requirement to a cooling request is larger than a predetermined amount.

14. The control unit according

Assignees

• Denso Corp

Inventors

• Ito Yutaro

Classifications

• B60W2510/305

  Power absorbed by auxiliaries · CPC title

• B60H1/00764 Primary

  the input being a vehicle driving condition, e.g. speed (B60H1/00828, B60H1/00864 take precedence) · CPC title

• B60W10/06

  including control of combustion engines · CPC title

• B60W2710/06

  Combustion engines, Gas turbines · CPC title

• B60H2001/3266

  related to the operation of the vehicle · CPC title