Internal combustion engine control system for vehicle and control method thereof
First Claim
1. An internal combustion engine control system for vehicle comprising:
- power generation information monitor means for monitoring a power generation information including a voltage generated by a vehicle generator driven by means of an internal combustion engine;
maximum engine speed limiting means for imposing a limit on a maximum engine speed of said internal combustion engine using a command signal; and
secondary failure avoiding control means for feeding said command signal to said maximum engine speed limiting means and maintaining the voltage generated by said vehicle generator at a normal value to avoid a secondary failure due to abnormality in said generated voltage in the case where it is determined that said generated voltage exceeds a predetermined value,wherein the system includes electric load control means for ON/OFF controlling an electric load that receives a power supply from said battery; and
said secondary failure avoiding control means controls said maximum engine speed limiting means and said electric load control means thereby controlling a revolving speed of said vehicle generator and an electric load, and maintains said generated voltage at a normal value to avoid the secondary failure, in the case where it is determined that said generated voltage exceeds a predetermined value.
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Accused Products
Abstract
An internal combustion engine control system for vehicle prevents an electronic device from being damaged due to over-voltage failure of a generator, and enables the vehicle to continue to travel. Over-voltage failure of a vehicle generator (3) is detected from a voltage generated by the vehicle generator (3) and a voltage of a battery (4). When detecting any over-voltage failure, a maximum engine speed limiting apparatus (13) for preventing over speed of an internal combustion engine (1) is controlled to suppress the engine speed. Any electric load that consumes a relatively large current and does not make the traveling dangerous such as headlight (5) or heater heating wire (6) is applied to suppress the over-voltage. The electric load to be applied is increased or decreased depending on magnitude of the over-voltage. Thus the vehicle can continues traveling even if any over-voltage failure occurs.
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Citations
16 Claims
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1. An internal combustion engine control system for vehicle comprising:
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power generation information monitor means for monitoring a power generation information including a voltage generated by a vehicle generator driven by means of an internal combustion engine; maximum engine speed limiting means for imposing a limit on a maximum engine speed of said internal combustion engine using a command signal; and secondary failure avoiding control means for feeding said command signal to said maximum engine speed limiting means and maintaining the voltage generated by said vehicle generator at a normal value to avoid a secondary failure due to abnormality in said generated voltage in the case where it is determined that said generated voltage exceeds a predetermined value, wherein the system includes electric load control means for ON/OFF controlling an electric load that receives a power supply from said battery; and said secondary failure avoiding control means controls said maximum engine speed limiting means and said electric load control means thereby controlling a revolving speed of said vehicle generator and an electric load, and maintains said generated voltage at a normal value to avoid the secondary failure, in the case where it is determined that said generated voltage exceeds a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An internal combustion engine control system for vehicle comprising:
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battery voltage monitor means for monitoring a battery voltage charged from a vehicle generator driven by means of an internal combustion engine; maximum engine speed limiting means for imposing a limit on a maximum engine speed of said internal combustion engine using a command signal; and secondary failure avoiding control means for feeding said command signal to said maximum engine speed limiting means, suppressing abnormality in battery voltage by maintaining a voltage generated by said vehicle generator at a normal value, and avoiding a secondary failure due to abnormality in battery voltage in the case where it is determined that said battery voltage exceeds a predetermined value. - View Dependent Claims (12, 13, 14)
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15. An internal combustion engine control system for vehicle comprising:
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power generation information monitor means for monitoring a power generation information including a voltage generated by a vehicle generator driven by means of an internal combustion engine; maximum engine speed limiting means for imposing a limit on a maximum engine speed of said internal combustion engine using a command signal; and secondary failure avoiding control means for feeding said command signal to said maximum engine speed limiting means and maintaining the voltage generated by said vehicle generator at a normal value to avoid a secondary failure due to abnormality in said generated voltage in the case where it is determined that said generated voltage exceeds a predetermined value, wherein said vehicle comprises a control device for a traveling system to control automatic transmission, and said secondary failure avoiding control means commands said control device for the traveling system to reduce a revolving speed for gear change control in said automatic transmission when determining that said generated voltage and/or said battery voltage exceeds a predetermined value.
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16. A method for controlling a vehicle internal combustion engine includes steps of:
- detecting a voltage generated by a vehicle generator driven by means of an internal combustion engine and a battery voltage charged from said vehicle generator;
operating maximum engine speed limiting means for imposing a limit on a maximum engine speed of said internal combustion engine to impose a limit on a revolving speed of said vehicle generator when said generated voltage exceeds a predetermined voltage; and
, when said generated voltage exceeds said predetermined voltage, maintaining said generated voltage and said battery voltage at a normal value by turning ON or OFF an electric load that receives a power supply from said battery to avoid a secondary failure due to abnormality in voltage.
- detecting a voltage generated by a vehicle generator driven by means of an internal combustion engine and a battery voltage charged from said vehicle generator;
Specification