Turbocharger boost control systems and methods for gear shifts

摘要

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.

主权项

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 compressor of a turbocharger; 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 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.