Transmission load predicting system for a stop-start system and a hybrid electric vehicle
First Claim
1. An engine system of a vehicle comprising:
- an engine torque module that determines an engine output torque profile including predicted torque outputs based on an accelerator signal and an engine state variable;
a load control module that determines a dynamic transmission load profile based on the engine output torque profile and an engine speed profile, wherein the dynamic transmission load profile includes transmission loads as a function of engine speed during an auto-start of an engine;
a compensation module that generates a torque compensation signal based on the dynamic transmission load profile; and
an actuator module that compensates for a change in a transmission load based on the torque compensation signal and during a transition of the engine from a crank state to an idle state.
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Accused Products
Abstract
An engine system of a vehicle includes an engine torque module. The engine torque module determines an engine output torque profile including predicted torque outputs based on an accelerator signal and an engine state variable. A load control module determines a dynamic transmission load profile based on the engine output torque profile and an engine speed profile. The dynamic transmission load profile includes transmission loads as a function of engine speed during an auto-start of an engine. A compensation module generates a torque compensation signal based on the dynamic transmission load profile. An actuator module compensates for a change in a transmission load based on the torque compensation signal and during a transition of the engine from a cranking state to an idle state.
58 Citations
20 Claims
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1. An engine system of a vehicle comprising:
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an engine torque module that determines an engine output torque profile including predicted torque outputs based on an accelerator signal and an engine state variable; a load control module that determines a dynamic transmission load profile based on the engine output torque profile and an engine speed profile, wherein the dynamic transmission load profile includes transmission loads as a function of engine speed during an auto-start of an engine; a compensation module that generates a torque compensation signal based on the dynamic transmission load profile; and an actuator module that compensates for a change in a transmission load based on the torque compensation signal and during a transition of the engine from a crank state to an idle state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method of operating an engine system comprising:
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determining an engine output torque profile including predicted torque outputs based on an accelerator signal and an engine state variable; determining a dynamic transmission load profile based on the engine output torque profile and an engine speed profile, wherein the dynamic transmission load profile includes transmission loads as a function of engine speed during a startup of an engine; generating a torque compensation signal based on the dynamic transmission load profile; and compensating for a change in a transmission load based on the torque compensation signal and during a transition of the engine from a crank state to an idle state. - View Dependent Claims (17, 18, 19, 20)
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Specification