Vehicle speed limiting via engine control commands issued by electronic transmission controller
First Claim
1. A method of limiting ground speed of a machine, comprising the steps of:
- propelling the machine at a speed by transmitting engine power to a ground engaging member of the machine via a drive train that includes a transmission;
executing a vehicle speed limit algorithm in an electronic transmission controller to determine an engine control message;
communicating the engine control message to an electronic engine controller via a communication link; and
limiting the speed responsive to the engine control message by executing an engine control algorithm in an electronic engine controller.
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Accused Products
Abstract
A machine includes a drive train with an electronically controlled transmission in communication with an electronic engine controller. The machine ground speed is limited by executing a vehicle speed limit algorithm in the electronic transmission controller. This algorithm generates an engine control message that is communicated to the electronic engine controller. The power output of the engine is reduced responsive to the engine control message. The machine responds by not exceeding a prescribed speed limit programmed into the electronic transmission controller. This vehicle speed limiting strategy is particularly applicable to machines without a vehicle speed limiting algorithm resident in the electronic engine controller.
19 Citations
20 Claims
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1. A method of limiting ground speed of a machine, comprising the steps of:
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propelling the machine at a speed by transmitting engine power to a ground engaging member of the machine via a drive train that includes a transmission; executing a vehicle speed limit algorithm in an electronic transmission controller to determine an engine control message; communicating the engine control message to an electronic engine controller via a communication link; and limiting the speed responsive to the engine control message by executing an engine control algorithm in an electronic engine controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A transmission comprising:
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a housing; an electronic transmission controller attached to the housing and including means for establishing a communication link with an electronic engine controller; and the electronic transmission controller being configured to execute a vehicle speed limit algorithm to generate an engine control message. - View Dependent Claims (14, 15, 16)
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17. A machine comprising:
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a chassis; a plurality of ground engaging members attached to the chassis; a drive train that includes an engine coupled to the ground engaging members attached to the chassis; the drive train including a transmission with an electronic transmission controller; the electronic transmission controller being configured to execute a vehicle speed limit algorithm to generate an engine control message; means for communicating between the electronic transmission controller and an electronic engine controller; and means for reducing a power output of the engine responsive to communication of the engine control message to the electronic engine controller. - View Dependent Claims (18, 19, 20)
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Specification