Vehicle control system

A vehicle control system comprising:

• a battery mounted in a vehicle;
• an electrically operated device that is operated by electric power supplied from the battery and drives a critical system of the vehicle;
• an electrically operated device controller which controls the operation of the electrically operated device;
• an engine controller which controls, by electric power supplied from the battery, the operation of an engine for making the vehicle travel;
• and
• means for ensuring that said engine controller stops operation of the engine before said electrically operated device controller becomes inoperable due to a decrease in voltage supplied from said battery;
• wherein said ensuring means comprises a minimum operating voltage increasing means that makes a minimum operating voltage of the engine controller higher than a minimum operating voltage of the electrically operated device controller after the engine controller has started.

A vehicle control system comprising:

• a battery mounted in a vehicle;
• an electrically operated device that is operated by electric power supplied from the battery and drives a critical system of the vehicle;
• an electrically operated device controller which controls the operation of the electrically operated device;
• an engine controller for controlling, by electric power supplied from the battery, the operation of an engine for making the vehicle travel;
• and
• means for ensuring that said engine controller stops operation of the engine before said electrically operated device controller becomes inoperable due to a decrease in voltage supplied from said battery;
• wherein said ensuring means comprises a battery voltage monitoring means for monitoring the voltage of the battery, and the battery voltage monitoring means stops the supply of electricity to the engine controller when the voltage of the battery decreases below a predetermined level.

A vehicle control system comprising:

• a battery mounted in a vehicle;
• an electrically operated device that is operated by electric power supplied from the battery and drives a critical system of the vehicle;
• an electrically operated device controller for controlling the operation of the electrically operated device;
• an engine controller for controlling, by electric power supplied from the battery, the operation of an engine for making the vehicle travel;
• and
• means for ensuring that said engine controller stops operation of the engine before said electrically operated device controller becomes inoperable due to a decrease in voltage supplied from said battery.