Automotive air conditioning system
First Claim
1. An air conditioning system for use in a motor vehicle powered by an internal combustion engine, comprising:
- an electric motor powered by a battery;
a compressor arranged to be powered by at least one of the internal combustion engine and said electric motor; and
a control unit that controls the driving of said compressor, said control unit being configured to execute;
driving said compressor by only said electric motor when the combustion engine is under an idling stop;
restarting said combustion engine upon expiration of a first given time from the time when the idling stop has occurred, so that thereafter said compressor is driven by both said combustion engine and said electric motor; and
stopping the driving of the compressor by said electric motor upon expiration of a second given time from the restarting of said combustion engine, so that thereafter said compressor is driven by only said combustion engine.
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Accused Products
Abstract
An air conditioning system for use in a motor vehicle powered by an internal combustion engine is described. The system comprises an electric motor powered by a battery; a compressor arranged to be powered by at least one of the internal combustion engine and the electric motor; and a control unit that controls the driving of the compressor. The control unit is configured to execute driving the compressor by only the electric motor when the combustion engine is under an idling stop; restarting the combustion engine upon expiration of a first given time from the time when the idling stop has occurred, so that thereafter the compressor is driven by both the combustion engine and the electric motor; and stopping the driving of the compressor by the electric motor upon expiration of a second given time from the restarting of the combustion engine, so that thereafter the compressor is driven by only the combustion engine.
125 Citations
13 Claims
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1. An air conditioning system for use in a motor vehicle powered by an internal combustion engine, comprising:
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an electric motor powered by a battery;
a compressor arranged to be powered by at least one of the internal combustion engine and said electric motor; and
a control unit that controls the driving of said compressor, said control unit being configured to execute;
driving said compressor by only said electric motor when the combustion engine is under an idling stop;
restarting said combustion engine upon expiration of a first given time from the time when the idling stop has occurred, so that thereafter said compressor is driven by both said combustion engine and said electric motor; and
stopping the driving of the compressor by said electric motor upon expiration of a second given time from the restarting of said combustion engine, so that thereafter said compressor is driven by only said combustion engine. - View Dependent Claims (2)
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3. An air conditioning system for use in a motor vehicle powered by an internal combustion engine, comprising:
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an electric motor powered by a battery;
a capacity variable compressor arranged to be powered by at least one of said internal combustion engine and said electric motor; and
a control unit that controls the driving of said compressor, said control unit being configured to execute;
(a) calculating a power needed for driving the compressor when the vehicle is ready for an idling stop of the engine;
(b) starting said electric motor when it is decided that the calculated power is obtainable by only said electric motor, so that thereafter said compressor is driven by both said internal combustion engine and said electric motor; and
(c) executing the idling stop upon expiration of a first predetermined time from the time when said electric motor has started. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
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11. An air conditioning system for use in a motor vehicle powered by an internal combustion engine, comprising:
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an electric motor powered by a battery;
a capacity variable compressor arranged to be powered by at least one of said internal combustion engine and said electric motor, said compressor being controllable to have a high predetermined capacity, a lower level of a low predetermined capacity or a higher level of the low predetermined capacity;
an air inlet opening controller arranged to inlet at least one of outside air and inside air into an air inlet opening of the air conditioning system, said air inlet opening controller having a first mode in which a normally conditioned air is led into a passenger room and a second mode in which the air inlet opening inlets either one of the outside air and inside air, that shows a temperature close to a target temperature of air blown into the passenger room; and
a control unit that controls the driving of said compressor and said air inlet opening controller, said control unit being configured to execute;
(a) keeping the compressor to operate in the high predetermined capacity and keeping the air inlet opening controller to operate in the first mode when the compressor is driven by only said engine;
(b) controlling the compressor to have the lower level of the low predetermined capacity and controlling the air inlet opening controller to assume said second mode upon receiving a signal representative of a previous notice of a temporary engine stop;
(c) turning the electric motor ON;
(d) stopping the engine upon passage of a given time from the turning ON of the electric motor; and
(e) controlling the compressor to operate in the higher level of the low predetermined capacity upon passage of a given time from the engine stopping. - View Dependent Claims (12, 13)
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Specification