Control device for engine having automatic stop and start function

• US 6,529,818 B2
• Filed: 12/14/2000
• Issued: 03/04/2003
• Est. Priority Date: 12/14/1999
• Status: Expired due to Fees

• Current Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Original Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Inventors: Izumiura, Atsushi, Nakaune, Kan, Matsubara, Atsushi, Kitajima, Shinichi
• Primary Examiner(s): Dolinar, Andrew M.
• Application Number:
  US09/735,457
• Publication Number:
  US 20010005807A1
• Time in Patent Office: 810 Days
• Field of Search: 701/112, 701/114, 123/179.4
• US Class Current: 701/112
• CPC Class Codes: F02N 11/0803 characterised by means for initiating engine start or stop F02N11/0814 takes precedence
• CPC Class Codes: F02N 11/10 Safety devices F02N11/08 takes precedence
• CPC Class Codes: F02N 2200/023 Engine temperature

Abstract

There is provided a control device for an engine including an automatic stop and start function, wherein detected data taken prior to an engine stop or results of an operation carried out based on the detected data are retained in executing an engine automatic stop control. In particular, in a case where the technology is applied to an engine including a thermostat proper operation determination function, a thermostat proper operation determination process is constructed so as to continue to be executed in executing an engine automatic stop control.

Claims

1. A control device for an engine having an automatic stop and start function, the engine including means for detecting values indicative of the engine operation, the control device comprising:

an electronic control unit for controlling an engine based on the detected values;

a memory device, the memory device for storing the detected values when the engine automatic stop function is executed, wherein at least one of the detected values taken prior to an engine stop function and an operation result which was carried out based on the detected value are stored in the memory device; and

a thermostat proper operation determination function, wherein when the engine automatic stop function is executed, a thermostat proper operation determination process is continuously executed based on the detected values taken prior to the engine stop function and the operation result.

2. The control device according to claim 2, wherein when said engine is in idling state, at least one of said detected values and operation result are initialzed.