Remote server

• US 9,777,661 B2
• Filed: 08/12/2014
• Issued: 10/03/2017
• Est. Priority Date: 08/28/2013
• Status: Active Grant

• Current Assignee: Yanmar Power Technology Co., Ltd. (Yanmar Holdings Co., Ltd.)
• Original Assignee: Yanmar Company Limited (Yanmar Holdings Co., Ltd.)
• Inventors: Ouchida, Takeshi, Eguchi, Shingo, Kawakami, Naoki
• Primary Examiner(s): Pipala, Edward J
• Application Number:
  US14/914,398
• Publication Number:
  US 20160201590A1
• Time in Patent Office: 1,148 Days
• CPC Class Codes: E02F 9/2054 Fleet management
• CPC Class Codes: F02D 2009/0223 Cooling water temperature
• CPC Class Codes: F02D 2200/022 Estimation of engine temperature
• CPC Class Codes: F02D 41/22 Safety or indicating devices for abnormal conditions in air/fuel ratio feedback systems F02D41/1495, in electric control linkage F02D11/107, in purge control systems F02M25/0809
• CPC Class Codes: F02D 41/266 the computer being backed-up or assisted by another circuit, e.g. analogue
• CPC Class Codes: G05B 13/026 using a predictor
• CPC Class Codes: G07C 5/008 communicating information to a remotely located station transmission systems for measured values G08C
• CPC Class Codes: G07C 5/0816 Indicating performance data, e.g. occurrence of a malfunction
• CPC Class Codes: Y02T 10/40 Engine management systems

Abstract

At least an embodiment may provide a remote server that can predict overheating of an engine. A remote server may receives an engine rotational speed, an engine load factor, and a cooling-water temperature. The remote server calculates a moving average of the engine load factor during a predetermine time, and calculates a correlation between the moving average of the engine load factor and the cooling-water temperature. If the correlation during a predetermined period is in the status of a predetermined difference from the correlation up to the predetermined period, the remote server predicts occurrence of overheating in a swing working vehicle that is used by a user.

Claims

1. A remote server that receives information on a rotational speed of an engine, information on a load factor of the engine, and information on a temperature of cooling water of the engine, wherein

the remote server calculates a moving average of the load factor during a predetermined time, and calculates a correlation between the moving average of the load factor of the engine and the temperature of the cooling water, and if the correlation during a predetermined period is in a status of a predetermined difference from the correlation before the predetermined period, the remote server predicts occurrence of overheating.

2. The remote server according to claim 1, wherein

the remote server receives information on an outside air temperature or information on an atmospheric pressure, and corrects the information on the temperature of the cooling water, based on an altitude calculated from the information on the outside air temperature or the information on the atmospheric pressure.

3. A remote server that receives information on a rotational speed of an engine, information on a load factor of the engine, and information on a temperature of cooling water of the engine, wherein

the remote server calculates an engine output from the information on the rotational speed of the engine and the information on the load factor of the engine, calculates a moving average of the engine output during a predetermined time, and calculates a correlation between the moving average of the engine output and the temperature of the cooling water, and if the correlation during a predetermined period is in a status of a predetermined difference from the correlation before the predetermined period, the remote server predicts occurrence of overheating.

4. The remote server according to claim 3, wherein

the remote server receives information on an outside air temperature or information on an atmospheric pressure, and corrects the information on the temperature of the cooling water, based on an altitude calculated from the information on the outside air temperature or the information on the atmospheric pressure.