TURBOCHARGER BOOST CONTROL SYSTEMS AND METHODS FOR GEAR SHIFTS
First Claim
1. A system for a vehicle, comprising:
- a spark control module that retards spark timing relative to a predetermined spark timing when an engine torque output reduction is requested for a gear shift;
a torque estimation module that estimates a first torque output of an engine based on N cylinders of the engine being fueled, an engine speed, an air per cylinder (APC), and the predetermined spark timing and that estimates a second torque output of the engine based on M cylinders being fueled, the engine speed, the APC, and the spark timing, wherein N is equal to a total number of cylinders of the engine and M is one of less than and equal to N;
an initial ratio determination module that determines an initial pressure ratio across a turbocharger compressor;
an adjustment determination module that determines an adjustment based on M and the first and second torque outputs;
a desired ratio determination module that generates a desired pressure ratio across the turbocharger compressor based on the adjustment and the initial pressure ratio; and
a boost actuator module that controls opening of a wastegate associated with the turbocharger based on the desired pressure ratio.
3 Assignments
0 Petitions
Accused Products
Abstract
A method includes: retarding spark timing relative to a predetermined spark timing when an engine torque output reduction is requested for a gear shift; estimating a first torque output of an engine based on N cylinders of the engine being fueled, an engine speed, an air per cylinder (APC), and the predetermined spark timing; estimating a second torque output of the engine based on M cylinders being fueled, the engine speed, the APC, and the spark timing. determining an initial pressure ratio across a turbocharger compressor; determining an adjustment based on M and the first and second torque outputs; generating a desired pressure ratio across the turbocharger compressor based on the adjustment and the initial pressure ratio; and controlling opening of a turbocharger wastegate based on the desired pressure ratio. N is a total number of cylinders of the engine and M is less than or equal to N.
57 Citations
20 Claims
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1. A system for a vehicle, comprising:
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a spark control module that retards spark timing relative to a predetermined spark timing when an engine torque output reduction is requested for a gear shift; a torque estimation module that estimates a first torque output of an engine based on N cylinders of the engine being fueled, an engine speed, an air per cylinder (APC), and the predetermined spark timing and that estimates a second torque output of the engine based on M cylinders being fueled, the engine speed, the APC, and the spark timing, wherein N is equal to a total number of cylinders of the engine and M is one of less than and equal to N; an initial ratio determination module that determines an initial pressure ratio across a turbocharger compressor; an adjustment determination module that determines an adjustment based on M and the first and second torque outputs; a desired ratio determination module that generates a desired pressure ratio across the turbocharger compressor based on the adjustment and the initial pressure ratio; and a boost actuator module that controls opening of a wastegate associated with the turbocharger based on the desired pressure ratio. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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retarding spark timing relative to a predetermined spark timing when an engine torque output reduction is requested for a gear shift; estimating a first torque output of an engine based on N cylinders of the engine being fueled, an engine speed, an air per cylinder (APC), and the predetermined spark timing; estimating a second torque output of the engine based on M cylinders being fueled, the engine speed, the APC, and the spark timing, wherein N is equal to a total number of cylinders of the engine and M is one of less than and equal to N; determining an initial pressure ratio across a turbocharger compressor; determining an adjustment based on M and the first and second torque outputs; generating a desired pressure ratio across the turbocharger compressor based on the adjustment and the initial pressure ratio; and controlling opening of a wastegate associated with the turbocharger based on the desired pressure ratio. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification