CYLINDER FIRING FRACTION DETERMINATION AND CONTROL SYSTEMS AND METHODS
First Claim
1. A cylinder firing fraction mapping system comprising:
- a selection module that selects a gear ratio for a transmission, a turbine speed for a torque converter, and a torque request for an engine;
a fueling determination module that determines a first fueling rate based on a first cylinder firing fraction, the torque request, and an engine speed and that determines a second fueling rate based on a second cylinder firing fraction, the torque request, and the engine speed; and
a mapping module that selects one of the first and second cylinder firing fractions based on a comparison of the first and second fueling rates and that stores the selected one of the first and second cylinder firing fractions in an entry of a mapping corresponding to the gear ratio, the turbine speed, and the torque request.
2 Assignments
0 Petitions
Accused Products
Abstract
A selection module selects a gear ratio for a transmission, a turbine speed for a torque converter, and a torque request for an engine. A fueling determination module determines a first fueling rate based on a first cylinder firing fraction, the torque request, and an engine speed and determines a second fueling rate based on a second cylinder firing fraction, the torque request, and the engine speed. A mapping module selects one of the first and second cylinder firing fractions based on a comparison of the first and second fueling rates and stores the selected one of the first and second cylinder firing fractions in an entry of a mapping corresponding to the gear ratio, the turbine speed, and the torque request.
42 Citations
20 Claims
-
1. A cylinder firing fraction mapping system comprising:
-
a selection module that selects a gear ratio for a transmission, a turbine speed for a torque converter, and a torque request for an engine; a fueling determination module that determines a first fueling rate based on a first cylinder firing fraction, the torque request, and an engine speed and that determines a second fueling rate based on a second cylinder firing fraction, the torque request, and the engine speed; and a mapping module that selects one of the first and second cylinder firing fractions based on a comparison of the first and second fueling rates and that stores the selected one of the first and second cylinder firing fractions in an entry of a mapping corresponding to the gear ratio, the turbine speed, and the torque request. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A cylinder firing fraction mapping method comprising:
-
selecting a gear ratio for a transmission, a turbine speed for a torque converter, and a torque request for an engine; determining a first fueling rate based on a first cylinder firing fraction, the torque request, and an engine speed; determining a second fueling rate based on a second cylinder firing fraction, the torque request, and the engine speed; selecting one of the first and second cylinder firing fractions based on a comparison of the first and second fueling rates; and storing the selected one of the first and second cylinder firing fractions in an entry of a mapping corresponding to the gear ratio, the turbine speed, and the torque request. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification