Gm Global Technolgoy Operations, Inc.

Brian L Spohn

Bryan Nathaniel Roos

Eugene Victor Gonze

Halim G Santoso

Todd Michael York

Brenton J Bergkoetter

Zhong Wang

Ryan D Martini

Miles K Maxey

Michael William Roblin

Richard D Starr

Christopher E Whitney

Sean W McGrogan

William Leonard Aldrich, Iii

John F Van Gilder

Lan Wang

Allen Joseph Lehmen

Tony T Hoang

George M Claypole

Eric M Hall

Vincent A White

Joseph M Tolkacz

Paul S Lombardo

Timothy E McCarthy

Karl Andrew Sime

William C Deneszczuk

Besim Demirovic

Jean Marie Miller

Jun Lu

David Edward Prout

Min K Kim

Jonathan J Stec

Kristopher J Kokko

Teresa L Cerbolles

Adeel Ahmed

Andrew Meintz

James D Ethington

A powertrain includes an engine, an exhaust system including an exhaust passageway in fluid communication with the engine, an exhaust gas heat exchanger, a transmission having a transmission cooling system, a transmission heat exchanger, a heater core, a pump, and an engine coolant circuit. The engine coolant circuit provides fluid communication between the engine, the exhaust gas heat exchanger, the transmission heat exchanger, the heater core, and the pump. The exhaust gas heat exchanger is operatively connected to the exhaust system and configured to transfer heat between the engine coolant circuit and the exhaust system. The transmission heat exchanger is operatively connected to the transmission cooling system and configured to transfer heat between the engine coolant circuit and the transmission cooling system.

Exhaust gas heat recovery system

A method of heating a cabin of a motor vehicle that includes an internal combustion engine operatively connected to an exhaust system having a catalyst, and a heating, ventilation, and air conditioning (HVAC) system is provided. The method includes detecting a request to increase temperature inside the cabin, supplying fuel and air to the engine, and motoring the engine to pump the fuel and air into the exhaust system. The method also includes heating the catalyst to combust the fuel and air inside the catalyst such that a stream of post-combustion exhaust gas is generated. The method additionally includes channeling the generated stream of post-combustion exhaust gas to the HVAC system such that a temperature of a coolant circulated through the HVAC system is increased to heat the cabin. A system configured to perform the above method is also disclosed.

System and method for heating a vehicle cabin

An automated method for diagnosing an EGHR having a coolant path, an exhaust path, a heat exchanger, and a valve. The coolant path passes through the heat exchanger and the valve selectively directs the exhaust path through the heat exchanger. The method includes monitoring an inlet temperature and an outlet temperature of the coolant path, determining an instantaneous coolant power from the monitored inlet temperature and outlet temperature, and integrating the instantaneous coolant power to determine a total energy recovered by the coolant path. The method monitors an instantaneous exhaust power, determines an instantaneous available EGHR power from the instantaneous exhaust power, and integrates the instantaneous available EGHR power to determine a nominal EGHR energy. A differential is calculated between the nominal EGHR energy and the total energy recovered by the coolant path. If the calculated differential is greater than an allowable tolerance, an EGHR error signal is sent.

EGHR mechanism diagnostics

A multi-position actuator includes a solenoid selectively energized to extend a rod. The actuator also includes a push-lever pivotably mounted to the rod and a crank-arm rotatably mounted on a first axis. The crank-arm includes multiple engagement elements arranged on a diameter centered relative to the first axis, and also includes a projection. The push-lever engages one of the engagement elements to rotate the crank-arm about the first axis in a forward direction when the solenoid is energized. The actuator additionally includes a pivoting locking-lever that blocks rotation of the crank-arm in forward direction and a one-way-clutch that blocks rotation of the crank-arm in reverse direction when the solenoid is de-energized. Furthermore, the actuator includes a slider-box lever having first and second slots. The projection slidably engages the first slot. The second slot is engaged with and operates an external device when rotation of the crank-arm swings the slider-box lever.

Multi-position actuator

A system and method for using exhaust gas to heat and/or charge a battery for a hybrid vehicle is provided. The system and method use an exhaust gas heat recovery (EGHR) device to heat a heat transfer fluid. The heat transfer fluid is thermally connected to a first heat exchanger to heat the battery and/or to a second heat exchanger to charge the battery if predetermined conditions are met.

System and method for using exhaust gas to heat and charge a battery for a hybrid vehicle

An engine control system comprises a temperature control module and an engine disabling module. The temperature control module regulates a first temperature of an electrically heated catalyst (EHC) based on a first predetermined light-off temperature while an engine is shut down. The engine disabling module selectively disables start up of the engine when a second temperature of a passive catalyst is less than a second predetermined light-off temperature while a maximum torque output of an electric motor is greater than a desired torque output.

Engine control systems and methods for minimizing fuel consumption

A method for operating an internal combustion engine includes increasing engine drag torque, transitioning from a cylinder deactivation state to an all-cylinder state, and decreasing engine drag torque immediately subsequent to transitioning to the all-cylinder state.

Method and apparatus for controlling an internal combustion engine during a combustion transition

A control system includes a state of charge module and a control module. The state of charge module receives a parameter associated with a battery in a vehicle and determines a state of charge of the battery based on the parameter. The control module activates a heater in a catalytic converter in an exhaust system of the vehicle based on the state of charge.

State of charge catalyst heating strategy

An electronics housing for a high voltage system of a vehicle defines an interior region, and includes a connection header wall having a window. An optical proximity sensor is disposed within the interior region of the electronics housing, adjacent the window. A cover is removably attached to the electronics housing adjacent an exterior surface of the connection header wall. The cover is disposed over the window. The optical proximity sensor is operable to sense the presence of the cover through the window when the cover is attached to the electronics housing.

High voltage protection system

A control module-implemented method for estimating an end of life a belt transferring torque between at least two rotating members of a belt drive system includes monitoring a plurality of belt parameters during a life cycle of the belt and determining an instantaneous damage factor of the belt based on the plurality of belt parameters. The end of life of the belt is estimated based on the instantaneous damage factor.

Method for determining belt life

Method to control a clutch device within a transmission selectively coupling an internal combustion engine to a driveline includes controlling slip of the clutch device in response to an engine autostart event. Controlling slip includes adjusting a commanded fill pressure to the clutch device to a first predetermined magnitude that exceeds a pressure threshold until the clutch device is filled, decreasing the commanded fill pressure from the first predetermined magnitude to a second predetermined magnitude below the pressure threshold, and adjusting the commanded fill pressure in accordance with a first ramping profile and in accordance with a subsequent second ramping profile when a transmission input speed achieves a desired first transmission input speed.

Driveline clutch variable clutch capacity reapply, shaping and lash management

Method for adjusting a state-of-charge within an electrical energy storage device of a hybrid powertrain system includes monitoring a plurality of electrical energy storage device parameters and determining a discharge power capability of the electrical energy storage device based on the monitored plurality of electrical energy storage device parameters. If the discharge capability is less than a first threshold, a state-of charge adjustment mode is activated. The state-of-charge adjustment mode includes increasing a commanded state-of-charge to an elevated state-of-charge to increase the discharge capability to achieve the first threshold and maintaining the commanded state-of-charge at the elevated state-of-charge until the discharge capability achieves the first threshold.

Control method to bias hybrid battery state-of-charge to improve autostop availability for light-electrification vehicles

A powertrain system includes an internal combustion engine rotatably coupled via an input member to a transmission. The transmission has a hydraulic circuit including a hydraulic fluid pump directly mechanically coupled to the input member. A computer-implemented method for operating the powertrain system includes, in response to a command to execute an engine autostop maneuver, determining an engine speed ramping profile to achieve a desired stopped engine position. Hydraulic pressure in the hydraulic circuit is controlled in response to the engine speed ramping profile and engine speed during said engine autostop maneuver.

Method and apparatus for engine torque cancellation in a powertrain system

A catalyst heating system includes a first monitoring module, a mode selection module and an electrically heated catalyst (EHC) control module. The first monitoring module monitors at least one of (i) a first temperature of a first catalyst of a catalyst assembly in an exhaust system of an engine and (ii) an active catalyst volume of the catalyst assembly. The mode selection module is configured to select an EHC heating mode and at least one of a fuel enrichment mode and a secondary air injection mode based on the at least one of the first temperature and the active catalyst volume. The EHC control module controls current to one of the first catalyst and a second catalyst of the catalyst assembly based on the mode signal.

Start-stop hybrid exothermic catalyst heating system

A method for controlling a hybrid powertrain system including an internal combustion engine includes controlling operation of the hybrid powertrain system in response to a preferred minimum coolant temperature trajectory for the internal combustion engine.

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Holly, MI, United States of America

Brian L Spohn