Static road gradient estimation
First Claim
Patent Images
1. A vehicle comprising:
- an engine configured for automatic shutdown and restart;
a controller configured tofilter a longitudinal acceleration using a low pass filter having a bandwidth selected from a plurality of bandwidths based on a derivative of the longitudinal acceleration,generate output indicative of a static road gradient estimation based on the filtered longitudinal acceleration,wherein the controller is further configured to shutdown and restart the engine based on the static road gradient estimation;
wherein an initial value of the static road gradient estimation corresponds to at least one of a kinematic road gradient estimation and a dynamic road gradient estimation.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicle and a vehicle system are provided with a controller that is configured to generate output indicative of a static road gradient estimation based on a filtered longitudinal acceleration. The filtered longitudinal acceleration is dependent upon a derivative of a longitudinal acceleration. An initial value of the static road gradient estimation corresponds to at least one of a kinematic road gradient estimation and a dynamic road gradient estimation.
34 Citations
19 Claims
-
1. A vehicle comprising:
-
an engine configured for automatic shutdown and restart; a controller configured to filter a longitudinal acceleration using a low pass filter having a bandwidth selected from a plurality of bandwidths based on a derivative of the longitudinal acceleration, generate output indicative of a static road gradient estimation based on the filtered longitudinal acceleration, wherein the controller is further configured to shutdown and restart the engine based on the static road gradient estimation; wherein an initial value of the static road gradient estimation corresponds to at least one of a kinematic road gradient estimation and a dynamic road gradient estimation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A vehicle system comprising:
a controller configured to; filter a longitudinal acceleration using a low pass filter having a bandwidth selected from a plurality of bandwidths based on a derivative of the longitudinal acceleration corresponding to a longitudinal jerk, generate output indicative of a static road gradient estimation based on the filtered longitudinal acceleration, and generate output indicative of a static quality factor based on the longitudinal jerk. - View Dependent Claims (14, 15, 16)
-
17. A method for estimating a static road gradient comprising:
-
filtering input indicative of a longitudinal acceleration using a low pass filter having a bandwidth selected from a plurality of bandwidths based on a derivative of the longitudinal acceleration; generating output indicative of a static road gradient estimation based on the filtered longitudinal acceleration; and generating output indicative of a static quality factor based on the derivative. - View Dependent Claims (18, 19)
-
Specification