Manifold absolute pressure control system and method for a hybrid electric vehicle
First Claim
1. A method for controlling manifold absolute pressure in a hybrid electric vehicle comprising an internal combustion engine in parallel with an electric motor/generator, the method comprising the steps of:
- monitoring the torque demand on the hybrid electric vehicle;
monitoring the manifold absolute pressure of the internal combustion engine;
supplying torque from the internal combustion engine to meet the torque demand; and
supplying torque from the motor/generator to load-level the torque supplied from the internal combustion engine and to maintain the manifold absolute pressure of the internal combustion engine within an acceptable range.
13 Assignments
0 Petitions
Accused Products
Abstract
Methods and apparatus are provided for controlling manifold absolute pressure in a hybrid electric vehicle that includes an internal combustion engine in parallel with an electric motor/generator. The method includes the steps of monitoring the torque demand on the hybrid electric vehicle, monitoring the manifold absolute pressure magnitude and change rate of the internal combustion engine, supplying torque from the internal combustion engine to meet the torque demand; and supplying torque from the motor/generator to load-level the torque supplied from the internal combustion engine and to maintain the manifold absolute pressure of the internal combustion engine within an acceptable range and rate.
37 Citations
18 Claims
-
1. A method for controlling manifold absolute pressure in a hybrid electric vehicle comprising an internal combustion engine in parallel with an electric motor/generator, the method comprising the steps of:
-
monitoring the torque demand on the hybrid electric vehicle;
monitoring the manifold absolute pressure of the internal combustion engine;
supplying torque from the internal combustion engine to meet the torque demand; and
supplying torque from the motor/generator to load-level the torque supplied from the internal combustion engine and to maintain the manifold absolute pressure of the internal combustion engine within an acceptable range. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A system for controlling manifold absolute pressure in an internal combustion engine of a hybrid electric vehicle comprising:
-
a combustion propulsion system;
an electric propulsion/generator configured to operate in parallel with the combustion propulsion system; and
an engine control unit coupled to the combustion propulsion system and to the electric propulsion/generator and configured to control the torque supplied by the combustion propulsion system and by the electric propulsion/generator to meet a total vehicle torque demand and to maintain the manifold absolute pressure and the rate of change of the manifold absolute pressure measured in the intake manifold of the combustion propulsion system within acceptable emission control limits. - View Dependent Claims (9, 10, 11)
-
-
12. A method for controlling the manifold absolute pressure in a hybrid electric vehicle comprising an internal combustion engine in parallel with an electric motor/generator, the method comprising the steps of:
-
monitoring the temperature of the internal combustion engine;
monitoring the torque demand of the hybrid electric vehicle;
determining an environmentally acceptable range of manifold absolute pressure and of rate of change of manifold absolute pressure as measured in the intake manifold of the internal combustion engine in response to the monitored temperature;
determining the maximum torque that is supplied by the internal combustion engine without exceeding the environmentally acceptable range of manifold absolute pressure and the rate of change of manifold absolute pressure;
determining the maximum torque that is supplied by the electric motor/generator, determining whether the maximum torque that is supplied by the electric motor/generator is greater than or equal to the difference between the torque demand and the maximum torque that is supplied by the internal combustion engine without exceeding the environmentally acceptable range of manifold absolute pressure and the rate of change of manifold absolute pressure; and
supplementing torque supplied by the internal combustion engine with torque supplied by the electric motor/generator to supply the vehicle torque demand. - View Dependent Claims (13, 14, 15, 16, 17, 18)
supplementing the torque supplied by the internal combustion engine with the maximum torque available from the electric motor/generator in response to determining that the maximum torque that is supplied by the electric motor/generator is less than the difference between the torque demand and the maximum torque; and
supplying torque from the internal combustion engine in excess of the maximum torque that is supplied by the internal combustion engine without exceeding the environmentally acceptable range of manifold absolute pressure and the rate of change of manifold absolute to meet the torque demand.
-
Specification