Motor vehicle having a wireless key, and method for operating
First Claim
1. A method for operating a motor vehicle having a first detection device detecting radio waves transmitted by a wireless key and a second detection device having a smaller detection range than the first detection device for the wireless key, comprising:
- detecting operation of an operator control element indicating a request for change in operation status of the motor vehicle;
performing a first search process by processing the radio waves in the first detection device in response to said detecting;
performing, when the wireless key associated with the motor vehicle has not been found by the first search process, a second search process from a fallback instant using the first and second detection devices one of continuously and intermittently and one of in parallel and alternately;
performing, at a switching instant when the wireless key associated with the motor vehicle has not been found for at least one of a predetermined period of time and a predetermined number of search processes using the first and second search processes after the fallback instant, a third search process using only the second detection device; and
operating a control device in the motor vehicle after detection of the wireless key.
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Accused Products
Abstract
A first detection device detects radio waves from a wireless key. A second detection device has a smaller detection range than the first detection device also detects radio waves from the key. The operation of an operator control element for switching the motor vehicle on and/or off performs a search process using the first detection device and then, if a key associated with the motor vehicle has not been found by the first detection device, performance of a search process using the second detection device from a fallback instant. Subsequent to the fallback instant the first and second detection devices perform a search process at least intermittently in parallel or alternately.
19 Citations
20 Claims
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1. A method for operating a motor vehicle having a first detection device detecting radio waves transmitted by a wireless key and a second detection device having a smaller detection range than the first detection device for the wireless key, comprising:
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detecting operation of an operator control element indicating a request for change in operation status of the motor vehicle; performing a first search process by processing the radio waves in the first detection device in response to said detecting; performing, when the wireless key associated with the motor vehicle has not been found by the first search process, a second search process from a fallback instant using the first and second detection devices one of continuously and intermittently and one of in parallel and alternately; performing, at a switching instant when the wireless key associated with the motor vehicle has not been found for at least one of a predetermined period of time and a predetermined number of search processes using the first and second search processes after the fallback instant, a third search process using only the second detection device; and operating a control device in the motor vehicle after detection of the wireless key. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A motor vehicle having an operator control element and a wireless key associated therewith, comprising:
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a first detection device detecting and processing radio waves transmitted by the wireless key; a second detection device having a smaller detection range than the first detection device for detecting the wireless key; and a controller programmed to perform a method including detecting operation of the operator control element indicating a request for change in operation status of the motor vehicle; performing a first search process using the first detection device in response to the request for change in operation status; performing, when the wireless key has not been found by the first search process, a second search process from a fallback instant using the first and second detection devices, one of in parallel and alternately, at least intermittently; and performing, at a switching instant when the wireless key has not been found for at least one of a predetermined period of time and a predetermined number of search processes using the first and second search processes after the fallback instant, a third search process using only the second detection device. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification