Apparatus for controlling the idling speed of an internal combustion engine
First Claim
1. An apparatus for controlling an idling speed of an internal combustion engine comprising:
- a first control system for adjusting the idling speed of the internal combustion engine in response to a load change experienced by the internal combustion engine, the first control system having a first reaction time; and
a second control system for adjusting the idling speed of the internal combustion engine in response to the load change, the second control system having a second reaction time which is shorter than the first reaction time, the second control system further comprising;
an electric machine operatively coupled to the internal combustion engine for applying a braking torque to the internal combustion engine to reduce the idling speed and for applying a driving torque to the internal combustion engine to increase the idling speed;
an inverter for supplying power to the electric machine; and
a controller in communication with the inverter for controlling the electric machine, the controller being responsive to the load change to control the electric machine either to reduce a braking torque or apply a driving torque to the internal combustion engine to substantially maintain the idling speed at a predefined level until the first reaction time has expired.
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Abstract
An apparatus for controlling an idling speed of an internal combustion engine is disclosed. The apparatus includes an electric machine operatively coupled to the internal combustion engine for applying a braking torque to the internal combustion engine to reduce the idling speed and for applying a driving torque to the internal combustion engine to increase the idling speed. It also includes a controller for controlling the electric machine. The controller is responsive to a load change to control the electric machine to apply one of a braking torque and a driving torque to the internal combustion engine to substantially maintain the idling speed at a predefined level.
80 Citations
11 Claims
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1. An apparatus for controlling an idling speed of an internal combustion engine comprising:
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a first control system for adjusting the idling speed of the internal combustion engine in response to a load change experienced by the internal combustion engine, the first control system having a first reaction time; and a second control system for adjusting the idling speed of the internal combustion engine in response to the load change, the second control system having a second reaction time which is shorter than the first reaction time, the second control system further comprising; an electric machine operatively coupled to the internal combustion engine for applying a braking torque to the internal combustion engine to reduce the idling speed and for applying a driving torque to the internal combustion engine to increase the idling speed; an inverter for supplying power to the electric machine; and a controller in communication with the inverter for controlling the electric machine, the controller being responsive to the load change to control the electric machine either to reduce a braking torque or apply a driving torque to the internal combustion engine to substantially maintain the idling speed at a predefined level until the first reaction time has expired. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An apparatus for controlling an idling speed of an internal combustion engine comprising:
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a first control system for adjusting the idling speed of the internal combustion engine in response to a load change experienced by the internal combustion engine, the first control system having a first reaction time; and a second control system for adjusting the idling speed of the internal combustion engine in response to the load change, the second control system having a second reaction time which is shorter than the first reaction time.
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Specification