Method and apparatus for permitting stable operation of a vehicle at an extremely low vehicle speed
AssigneeBayerische Motoren Werke Aktiengesellschaft
InventorBernhard Rastinger
Life of this patent
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Abstract
The method and apparatus according to the invention permits stable driving operation of a motor vehicle at an extremely low vehicle speed by means of an electronic control unit. The internal-combustion engine is automatically adjusted by the control unit to a special rotational speed operation when a defined switch is operated or when a defined set of conditions exists. During special rotational speed operation, the special rotational speed is below the normally permissible idling rotational speed.
Claims25
A method for permitting stable driving operation of a motor vehicle at low vehicle speed comprising:
- detecting manual actuation of a designated switch;
- in response to detected operation of the switch, a vehicle electronic control unit adjusting an internal combustion engine of the vehicle to a special rotational speed operation mode in which said engine is operable at a rotational speed that is below a preset normal idling rotational speed.
A method for permitting stable driving operation of a motor vehicle at low vehicle speed, comprising:
- detecting preselected vehicle operating parameters;
- when a defined combination of conditions exists, an engine control unit automatically adjusting an internal-combustion engine of the vehicle to a special rotational speed operation mode in which said engine is operable at a rotational speed that is below a preset normal idling rotational speed.
Apparatus for permitting stable driving operation of a motor vehicle at low vehicle speed, comprising:
- an electronic engine control unit;
- and
- a manually operable switch coupled to the control unit;
- wherein in response to actuation of the switch by a vehicle operator, the engine control unit adjusts the internal-combustion engine to a special rotational speed operation mode in which said engine is operable at a rotational speed that is below a preset normal idling rotational speed.
Apparatus for permitting stable driving operation of a motor vehicle at an extremely low vehicle speed, comprising:
- an electronic engine control unit;
- and
- sensors for detecting preselected vehicle operating parameters;
- wherein, when predetermined vehicle operating conditions are detected by said sensors, the engine control unit adjusts the internal-combustion engine to a special rotational speed operation in which said engine is operable at a rotational speed that is below a preset normal idling rotational speed.
A method for controlling operation of a motor vehicle having an internal combustion engine with a preset idling rotational speed, said method comprising:
- detecting manual actuation of a designated switch;
- in response to detected operation of the switch, a vehicle electronic control unit adjusting the internal combustion engine to a special rotational speed operation mode in which said engine is operable at a rotational speed that is below the preset normal idling rotational speed.
A method for controlling operation of a motor vehicle having an internal combustion engine with a preset idling rotational speed, said method comprising:
- detecting preselected vehicle operating parameters;
- when a defined combination of conditions exists, an engine control unit automatically adjusting the internal-combustion engine to a special rotational speed operation mode in which said engine is operable at a rotational speed that is below a preset normal idling rotational speed.
Dependencies are inferred from the claim text.