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Control method for vehicle air conditioning, and vehicle air conditioning device
US10899354B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10899354-B2 |
| Application number | US-201716606254-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 16, 2017 |
| Priority date | May 16, 2017 |
| Publication date | Jan 26, 2021 |
| Grant date | Jan 26, 2021 |
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- Title
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Abstract
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A vehicle air-conditioning device is provided for controlling a vehicle air-conditioning of a vehicle in accordance with a control method. A negative pressure, which is generated in an intake passage of the internal combustion engine by a vacuum servo that assists a brake pedal force, is estimated based on an atmospheric pressure and a pressure inside the intake passage. When a predetermined condition is established that includes a state in which the estimated negative pressure inside the vacuum servo is insufficient relative to a predetermined pressure during operation of the air-conditioning compressor, the air-conditioning compressor is stopped during a first time period, the air-conditioning compressor is operated during a second time period regardless of the predetermined condition after the first time period has elapsed, and operation of the air-conditioning compressor is controlled in accordance the states of the predetermined condition being established after the second time period has elapsed.
First claim
Opening claim text (preview).
The invention claimed is: 1. A control method for controlling air-conditioning of a vehicle, the control method comprising: providing an air-conditioning compressor driven by an internal combustion engine; providing a negative pressure estimation unit that estimates a negative pressure, which is generated in an intake passage of the internal combustion engine by a vacuum servo that assists a brake pedal force, based on an atmospheric pressure and a pressure inside the intake passage; and when a predetermined condition is established that includes a state in which the estimated negative pressure inside the vacuum servo is insufficient relative to a predetermined pressure during operation of the air-conditioning compressor, a state in which the brake pedal is pressed and the engine is idling, and a state in which the vehicle traveling, stopping the air-conditioning compressor during a first time period, operating the air-conditioning compressor during a second time period regardless of the predetermined condition after the first time period has elapsed, and controlling operation of the air-conditioning compressor in accordance with the established state of the predetermined condition after the second time period has elapsed. 2. The control method according to claim 1 , wherein the negative pressure estimation unit is further configured to estimate the negative pressure inside the vacuum servo based on a value obtained by subtracting the atmospheric pressure from the pressure inside the intake passage. 3. A vehicle air-conditioning device for a vehicle, the vehicle air-conditioning device comprising: an air-conditioning compressor driven by an internal combustion engine; a negative pressure estimation unit that estimates a negative pressure, which is generated in an intake passage of the internal combustion engine by a vacuum servo that assists a brake pedal force, based on an atmospheric pressure and a pressure inside the intake passage; and a controller that controls operation of the air-conditioning compressor such that when a predetermined condition is established that includes a state in which the estimated negative pressure inside the vacuum servo is insufficient relative to a predetermined pressure during operation of the air-conditioning compressor, a state in which the brake pedal is pressed and the engine is idling, and a state in which the vehicle traveling, the air-conditioning compressor is stopped during a first time period, the air-conditioning compressor is operated during a second time period regardless of the predetermined condition after the first time period has elapsed, and operation of the air-conditioning compressor is controlled in accordance with the states of the predetermined condition being established after the second time period has elapsed.
Assignees
Inventors
Classifications
Ambient conditions, e.g. wind or rain · CPC title
Brake pedal position · CPC title
Combustion engines, Gas turbines · CPC title
- B60W30/18181Primary
Propulsion control with common controlling member for different functions · CPC title
including control of auxiliary equipment, e.g. air-conditioning compressors or oil pumps · CPC title
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Frequently asked questions
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- What does patent US10899354B2 cover?
- A vehicle air-conditioning device is provided for controlling a vehicle air-conditioning of a vehicle in accordance with a control method. A negative pressure, which is generated in an intake passage of the internal combustion engine by a vacuum servo that assists a brake pedal force, is estimated based on an atmospheric pressure and a pressure inside the intake passage. When a predetermined co…
- Who is the assignee on this patent?
- Nissan Motor
- What technology area does this patent fall under?
- Primary CPC classification B60W30/18181. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jan 26 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).