CONTROL SYSTEM FOR VEHICLE FOR CONTROLLING AN INTERNAL COMBUSTION ENGINE DURING|TRANSMISSION GEAR SHIFTING

摘要

A control system for a vehicle performs torque down control to reduce torque of an engine by cutting off supply of fuel to at least one of the cylinders of the engine during an inertia phase of a power-on upshift. During the torque down control, the throttle opening is reduced to smaller than a throttle opening including an amount by which the throttle opening is increased so as to compensate for a part of the amount of torque reduction, by means of one or more cylinders to which the fuel continues to be supplied.

主权项

1. A control system for a vehicle including an engine having a plurality of cylinders, a catalyst provided in an exhaust pipe of the engine, and an automatic transmission that transmits power from the engine toward driving wheels, the system comprising:
an electronic control unit configured to: (i) perform torque down control to reduce torque of the engine by cutting off fuel supply to at least one of the cylinders of the engine during an inertia phase of a power-on upshift, (ii) to perform a control for reducing a throttle opening during execution of the torque down control when an amount of nitrogen oxides deposited on the catalyst is larger than a given value, and (iii) reduce the throttle opening by a larger degree during execution of the torque down control as an amount of nitrogen oxides deposited on the catalyst is larger.