Intermittent restart for automatic engine stop start system
First Claim
Patent Images
1. A stop/restart system for a vehicle, comprising:
- (a) a vehicle having an engine;
(b) an engine speed sensor configured to sense engine speed; and
(c) a controller configured to receive signals from the engine speed sensor and to control delivery of fuel to the engine, wherein the controller is programmed to;
(i) determine if a stop/start enablement condition has been met;
(ii) initiate an engine shutdown;
(iii) initiating a first intermittent engine restart process in response to the restart request when engine speed is greater than the predetermined threshold speed; and
(iv) initiate a second intermittent engine restart process in response to the restart request when engine speed is greater than 0 and less than the predetermined threshold speed.
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Abstract
A disclosed method of automatically stopping and restarting a vehicle engine determines if one or more stop/start enablement condition has been met. If the stop/start enablement condition or conditions have been met, the method initiates an engine shutdown. If a restart request is made before the engine reaches a predetermined threshold speed, then a first restart sequence is initiated. If a restart request is made when the engine speed is less than the predetermined threshold speed but still greater than 0, then a second restart sequence is initiated.
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Citations
20 Claims
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1. A stop/restart system for a vehicle, comprising:
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(a) a vehicle having an engine; (b) an engine speed sensor configured to sense engine speed; and (c) a controller configured to receive signals from the engine speed sensor and to control delivery of fuel to the engine, wherein the controller is programmed to; (i) determine if a stop/start enablement condition has been met; (ii) initiate an engine shutdown; (iii) initiating a first intermittent engine restart process in response to the restart request when engine speed is greater than the predetermined threshold speed; and (iv) initiate a second intermittent engine restart process in response to the restart request when engine speed is greater than 0 and less than the predetermined threshold speed. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of automatically stopping and restarting a vehicle engine, comprising the steps of:
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(a) determining if a stop/start enablement condition has been met; (b) initiating an engine shutdown; (c) receiving a restart request; (d) initiating a first intermittent engine restart sequence in response to the restart request when engine speed is greater than the predetermined threshold speed; and (e) initiating a second intermittent engine restart sequence in response to the restart request when engine speed is greater than 0 and less than the predetermined threshold speed. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification