Method of signaling an engine stop or start request
First Claim
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1. A computer implemented method of signaling that the driver of a vehicle is requesting a shutdown of the engine of a motor vehicle comprising:
- a) determining that the vehicle has stopped;
b) creating a force measurement to determine the driver brake pedal force;
c) generating a fast filter output from a predetermined number of driver brake pedal force measurements from step b);
d) generating a slow filter output from a predetermined number of driver brake pedal force measurements from step b);
e) calculating a total filter output by subtracting the slow filter output from the fast filter output;
f) determining if the total filter output exceeds a threshold value;
g) determining a minimum brake pedal force threshold by averaging vehicle stops with a low rate of deceleration, and actively adjusting the minimum brake pedal force threshold using a weighted average with additional vehicle stops with a low rate of deceleration;
h) determining if the driver brake pedal exceeds the minimum brake pedal force threshold;
i) determining a maximum brake pedal force threshold by averaging vehicle stops with a high rate of deceleration, and actively adjusting the maximum brake pedal force threshold using a weighted average with additional vehicle stops with a high rate of deceleration;
j) determining if the driver brake pedal force is less than the maximum brake pedal force threshold; and
k) signaling an engine start stop device to shut off the engine if all of the following conditions are met;
i) the vehicle is stopped,ii) the total filter output exceeds a threshold value,iii) the driver brake pedal force exceeds the minimum brake pedal force threshold,iv) the driver brake pedal force is less than the maximum brake pedal force threshold at the time when the vehicle speed reaches zero while the engine is running.
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Abstract
This invention provides a computer implemented method which allows the driver to request engine shut down and engine and restarts the engine of a motor vehicle by changing driver brake pedal force, that is, the force which the driver applies to the brake pedal, after the vehicle has stopped. After the vehicle has stopped, changes in the driver brake pedal force are compared to threshold values to determine if the driver is requesting an engine stop or an engine start.
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Citations
40 Claims
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1. A computer implemented method of signaling that the driver of a vehicle is requesting a shutdown of the engine of a motor vehicle comprising:
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a) determining that the vehicle has stopped; b) creating a force measurement to determine the driver brake pedal force; c) generating a fast filter output from a predetermined number of driver brake pedal force measurements from step b); d) generating a slow filter output from a predetermined number of driver brake pedal force measurements from step b); e) calculating a total filter output by subtracting the slow filter output from the fast filter output; f) determining if the total filter output exceeds a threshold value; g) determining a minimum brake pedal force threshold by averaging vehicle stops with a low rate of deceleration, and actively adjusting the minimum brake pedal force threshold using a weighted average with additional vehicle stops with a low rate of deceleration; h) determining if the driver brake pedal exceeds the minimum brake pedal force threshold; i) determining a maximum brake pedal force threshold by averaging vehicle stops with a high rate of deceleration, and actively adjusting the maximum brake pedal force threshold using a weighted average with additional vehicle stops with a high rate of deceleration; j) determining if the driver brake pedal force is less than the maximum brake pedal force threshold; and k) signaling an engine start stop device to shut off the engine if all of the following conditions are met; i) the vehicle is stopped, ii) the total filter output exceeds a threshold value, iii) the driver brake pedal force exceeds the minimum brake pedal force threshold, iv) the driver brake pedal force is less than the maximum brake pedal force threshold at the time when the vehicle speed reaches zero while the engine is running. - View Dependent Claims (3, 5, 6, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 37, 38, 39, 40)
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2. A computer implemented method of signaling that the driver of a vehicle is requesting a restart of a motor vehicle comprising:
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a) determining that the engine is shut off; b) creating a force measurement to determine the driver brake pedal force; c) determining a minimum brake pedal force threshold by averaging vehicle stops with a low rate of deceleration, and actively adjusting the minimum brake pedal force threshold using a weighted average with additional vehicle stops with a low rate of deceleration; d) determining if the driver brake pedal force is less than the minimum brake pedal force threshold; e) generating a fast filter output for a predetermined number of driver brake pedal force measurements from step b; f) generating a slow filter output for a predetermined number of driver brake pedal force measurements from step b; g) calculating a total filter output by subtracting the slow filter output from the fast filter output; h) determining if the total filter output is less than a threshold value; i) signaling an engine start stop device to start the engine if either one or both of the following conditions are met; i) the total filter output is negative and below a threshold value, ii) the brake pedal force is less than the minimum brake pedal force threshold. - View Dependent Claims (4, 7, 8, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification