Alcohol detection system and method for vehicle
First Claim
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1. An alcohol detection system for a vehicle comprising:
- an alcohol detection section that detects alcohol concentration in breath air of a user seating in a driver'"'"'s seat in a vehicle, the alcohol detection section including a measurement chamber for receiving the breath air of the user to be measured and a fan for exhausting residual gas in the measurement chamber;
a measurement preparation operation section that performs at least driving operation of the fan, as an alcohol measurement preparation operation, which changes the alcohol detection section from an initial state to a predetermined stable operation state;
a travel control section that permits normal travel of the vehicle when alcohol concentration measured under the predetermined stable operation state is below a predetermined threshold level, and prohibits travel of the vehicle over a predetermined travel speed when the alcohol concentration is over the threshold level;
a pre-driving output signal detection section that detects a predetermined pre-driving output signal outputted necessarily before an ignition switch is manipulated by the user entering the vehicle from an outside of the vehicle; and
a measurement preparation operation start instruction section that instructs the measurement preparation operation section to start the measurement preparation operation when the pre-driving output signal is detected.
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Abstract
An alcohol detection system for a vehicle has an alcohol sensor, for which alcohol measurement preparation processing such as heating the alcohol sensor to a predetermined temperature is performed, so that the alcohol sensor operates under the stable operation state. The alcohol measurement preparation processing is started, before a driver actually gets in the vehicle. For example, the preparation processing is started, when a predetermined manipulation of a driver on the vehicle before entering the vehicle is detected. The manipulation may be unlocking or opening of a vehicle door.
31 Citations
20 Claims
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1. An alcohol detection system for a vehicle comprising:
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an alcohol detection section that detects alcohol concentration in breath air of a user seating in a driver'"'"'s seat in a vehicle, the alcohol detection section including a measurement chamber for receiving the breath air of the user to be measured and a fan for exhausting residual gas in the measurement chamber; a measurement preparation operation section that performs at least driving operation of the fan, as an alcohol measurement preparation operation, which changes the alcohol detection section from an initial state to a predetermined stable operation state; a travel control section that permits normal travel of the vehicle when alcohol concentration measured under the predetermined stable operation state is below a predetermined threshold level, and prohibits travel of the vehicle over a predetermined travel speed when the alcohol concentration is over the threshold level; a pre-driving output signal detection section that detects a predetermined pre-driving output signal outputted necessarily before an ignition switch is manipulated by the user entering the vehicle from an outside of the vehicle; and a measurement preparation operation start instruction section that instructs the measurement preparation operation section to start the measurement preparation operation when the pre-driving output signal is detected. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification