Mihai Dorobantu
Irvine, California, United States
2K followers
500+ connections
About
● Creates…
Activity
-
A Farewell to my Friends at HDT I have filed my final story for HDT. But you haven’t heard the last from me. My recent health scare is in no way…
A Farewell to my Friends at HDT I have filed my final story for HDT. But you haven’t heard the last from me. My recent health scare is in no way…
Liked by Mihai Dorobantu
-
See how we're influencing the next generation of electric vehicle engineers. Our Technical Strategy Lead for #eMobility, Scott Sullivan Sullivan…
See how we're influencing the next generation of electric vehicle engineers. Our Technical Strategy Lead for #eMobility, Scott Sullivan Sullivan…
Liked by Mihai Dorobantu
-
What does it mean to have someone believe in your potential? Everything. ✨ It is with tremendous honor and a humble heart that I share the exciting…
What does it mean to have someone believe in your potential? Everything. ✨ It is with tremendous honor and a humble heart that I share the exciting…
Liked by Mihai Dorobantu
Experience & Education
Publications
-
Fuel saving potential of hybrid powertrains with electric waste heat recovery for heavy duty line haul applications
International Journal of Powertrains
Patents
-
Aftertreatment heat up strategies in vehicles with hybrid powertrains
Issued US11814033B2
A vehicle hybrid powertrain includes an internal combustion engine; an electrical drivetrain; a light-off selective catalytic reduction (LO-SCR) device coupled to receive exhaust from the internal combustion engine; and a control system that directs cylinder deactivation (CDA) of the internal combustion engine and controls heat applied to the LO-SCR device.
-
Transmission control with cylinder deactivation
Issued US11578673B2
A method for controlling vehicle speed comprises selecting an engine speed profile for a vehicle. Road grade data is received and processed to determine a road grade for the vehicle. Vehicle speed data is received and processed to determine a vehicle speed for the vehicle. A cylinder deactivation mode for a valvetrain of a multi-cylinder engine of the vehicle is selected. The cylinder deactivation mode comprises deactivating one or more intake valve, exhaust valve, and fuel injection for one or…
A method for controlling vehicle speed comprises selecting an engine speed profile for a vehicle. Road grade data is received and processed to determine a road grade for the vehicle. Vehicle speed data is received and processed to determine a vehicle speed for the vehicle. A cylinder deactivation mode for a valvetrain of a multi-cylinder engine of the vehicle is selected. The cylinder deactivation mode comprises deactivating one or more intake valve, exhaust valve, and fuel injection for one or more cylinder of the multi-cylinder engine. The selected cylinder deactivation mode provides a controlled deviation from the selected engine speed profile at the road grade and vehicle speed.
-
Switchable powertrain
Issued US11560140B2
A switchable powertrain comprises at least four points of freedom. The switchable powertrain comprises a main gear set configured for gear ratio selection, the main gear set comprising main gears coupled to a main shaft and second gears coupled to a second shaft. An adapter comprises a first selective coupling configured to selectively couple to the main shaft, and a second selective coupling configured to selectively couple to the second shaft. A first torque source and a clutch are configured…
A switchable powertrain comprises at least four points of freedom. The switchable powertrain comprises a main gear set configured for gear ratio selection, the main gear set comprising main gears coupled to a main shaft and second gears coupled to a second shaft. An adapter comprises a first selective coupling configured to selectively couple to the main shaft, and a second selective coupling configured to selectively couple to the second shaft. A first torque source and a clutch are configured for selectively coupling or decoupling first torque to the main shaft. A second torque source is configured for selectively outputting second torque to the first selective coupling or to the second selective coupling.
-
Two stroke engine braking via cylinder deactivation and late intake valve closing
Issued US11300061B2
A method for engine braking on a type III valvetrain diesel engine comprises, on a first downstroke of a reciprocating piston, deactivating a normal intake lift profile on a first intake valve to implement a deactivated intake profile. Before a first upstroke of the reciprocating piston completes, a late intake valve closing lift profile is actuating on a second intake valve and beginning an engine brake lift profile on a first exhaust valve. On a second downstroke of the reciprocating piston…
A method for engine braking on a type III valvetrain diesel engine comprises, on a first downstroke of a reciprocating piston, deactivating a normal intake lift profile on a first intake valve to implement a deactivated intake profile. Before a first upstroke of the reciprocating piston completes, a late intake valve closing lift profile is actuating on a second intake valve and beginning an engine brake lift profile on a first exhaust valve. On a second downstroke of the reciprocating piston, the engine brake lift profile on the first exhaust valve is completing and a normal exhaust lift profile is deactivating on a second exhaust valve to implement a deactivated exhaust profile on the second exhaust valve. Before a second upstroke of the reciprocating piston completes, a second engine brake lift profile is beginning on the first exhaust valve.
-
Type II valvetrains to enable variable valve actuation
Issued US11300015B2
A valvetrain for a type II engine comprises a valve bridge, a switching rocker arm, a center capsule, a first auxiliary rocker arm, and a first auxiliary capsule. The selectively switching rocker arm is configured to switch configurations to transfer a first valve actuation profile from a first overhead cam lobe to the valve bridge center point and to transfer a second valve actuation profile from a second overhead cam lobe to the center point. The center capsule is configured to switch between…
A valvetrain for a type II engine comprises a valve bridge, a switching rocker arm, a center capsule, a first auxiliary rocker arm, and a first auxiliary capsule. The selectively switching rocker arm is configured to switch configurations to transfer a first valve actuation profile from a first overhead cam lobe to the valve bridge center point and to transfer a second valve actuation profile from a second overhead cam lobe to the center point. The center capsule is configured to switch between an active state and a lost motion state. The first auxiliary rocker arm is configured to transfer a first auxiliary valve actuation profile from a third overhead cam lobe to the valve bridge first valve mounting area. The valvetrain can further comprise a second auxiliary rocker arm and a second auxiliary capsule.
-
Extended coast and controlled deceleration using cylinder deactivation
Issued US 11187162 B2
A method for controlling vehicle speed comprises selecting an engine speed profile for a vehicle. Road grade data is received and processed to determine a road grade for the vehicle. Vehicle speed data is received and processed to determine a vehicle speed for the vehicle. A cylinder deactivation mode for a valvetrain of a multi-cylinder engine of the vehicle is selected. The cylinder deactivation mode comprises deactivating one or more intake valve, exhaust valve, and fuel injection for one or…
A method for controlling vehicle speed comprises selecting an engine speed profile for a vehicle. Road grade data is received and processed to determine a road grade for the vehicle. Vehicle speed data is received and processed to determine a vehicle speed for the vehicle. A cylinder deactivation mode for a valvetrain of a multi-cylinder engine of the vehicle is selected. The cylinder deactivation mode comprises deactivating one or more intake valve, exhaust valve, and fuel injection for one or more cylinder of the multi-cylinder engine. The selected cylinder deactivation mode provides a controlled deviation from the selected engine speed profile at the road grade and vehicle speed.
-
Transmission mounted electrical charging system and dual driveline load coupling
Issued US 11084373 B2
A system includes a PTO device that selectively couples to a driveline of a vehicle at each of two driveline coupling positions, and a motor/generator electrically coupled to an electrical power storage system. The system further includes a shared load selectively powered by the driveline or the motor/generator. The PTO device further includes a coupling actuator that couples the shared load to the motor/generator in a first position, and couples the shared load to the driveline in a second…
A system includes a PTO device that selectively couples to a driveline of a vehicle at each of two driveline coupling positions, and a motor/generator electrically coupled to an electrical power storage system. The system further includes a shared load selectively powered by the driveline or the motor/generator. The PTO device further includes a coupling actuator that couples the shared load to the motor/generator in a first position, and couples the shared load to the driveline in a second position.
-
Adapter for connecting a countershaft transmission with a hydraulic launch assist system
Issued US8813593B2
This invention provides a common means of coupling an alternative power source to a vehicle's drive wheels which is particularly well suited for use with a countershaft-type transmission. This invention also addresses clutch wear by eliminating the need to engage the frictional clutch to launch the vehicle. This invention also improves the acceleration of the vehicle compared to a typical dry friction clutch launch by relying on the HLA system to transfer more power to the drive wheels more…
This invention provides a common means of coupling an alternative power source to a vehicle's drive wheels which is particularly well suited for use with a countershaft-type transmission. This invention also addresses clutch wear by eliminating the need to engage the frictional clutch to launch the vehicle. This invention also improves the acceleration of the vehicle compared to a typical dry friction clutch launch by relying on the HLA system to transfer more power to the drive wheels more quickly than would be transferred by a typical launch engagement of a dry friction clutch in a commercial vehicle.
-
Pneumatic flow control valve for fire suppression over pressure prevention
Issued US8783644B2
A controlled pressure release valve includes a valve body having a gas inlet for connection to a gas container and a gas outlet for delivering gas to a protected area. The controlled valve comprises a slidable spool housed in the valve body that is slidable between a first position and a second position. The slidable spool has a first end and a second end. A primary flow passage connects the gas inlet and the gas outlet and increases with lineal movement of the slidable spool. The sliding spool…
A controlled pressure release valve includes a valve body having a gas inlet for connection to a gas container and a gas outlet for delivering gas to a protected area. The controlled valve comprises a slidable spool housed in the valve body that is slidable between a first position and a second position. The slidable spool has a first end and a second end. A primary flow passage connects the gas inlet and the gas outlet and increases with lineal movement of the slidable spool. The sliding spool is biased towards the first position by a gas pressure applied by the second chamber and a spring.
-
Proportional valve employing simultaneous and hybrid actuation
Issued US8678033B2
Disclosed is an exemplary valve having a first valve member that may include at least one orifice, and which is moveable between a first position and a second position, and a second valve member that includes at least one orifice, and which is moveable relative to the first valve member between a first position, in which the at least one orifice of the second valve member is fluidly disconnected from the at least one orifice of the first valve member, and a second position, in which the at…
Disclosed is an exemplary valve having a first valve member that may include at least one orifice, and which is moveable between a first position and a second position, and a second valve member that includes at least one orifice, and which is moveable relative to the first valve member between a first position, in which the at least one orifice of the second valve member is fluidly disconnected from the at least one orifice of the first valve member, and a second position, in which the at least one orifice of the second valve member is fluidly connected to the at least one orifice of the first valve member. The exemplary valve may also include first and second actuators for moving the first and second valve members between their respective first and second positions.
-
Piecewise variable displacement power transmission
Issued US8511079B2
In one embodiment, a hydraulic circuit has an input shaft, at least one positive displacement hydraulic pump, a plurality of positive displacement hydraulic motors, and at least one fluid line operatively connecting the at least one positive displacement hydraulic pump to the positive displacement hydraulic motors. In operation, the at least one positive displacement hydraulic pump is placed in an operative condition. At least one of the positive displacement hydraulic motors is also placed in…
In one embodiment, a hydraulic circuit has an input shaft, at least one positive displacement hydraulic pump, a plurality of positive displacement hydraulic motors, and at least one fluid line operatively connecting the at least one positive displacement hydraulic pump to the positive displacement hydraulic motors. In operation, the at least one positive displacement hydraulic pump is placed in an operative condition. At least one of the positive displacement hydraulic motors is also placed in an operative condition. A flow rate of fluid in the fluid line is measured, and the remaining positive displacement hydraulic motors are switched between an operative condition and a bypass condition according to the measured flow rate of the fluid
Languages
-
English
-
-
Romanian
-
-
Swedish
-
Organizations
-
21 Century Truck Partnership
Industry director, Hybrids and Powertrain Working Group
-
North American Council for Fuel Efficiency
Board of Directors
-
Society of Automotive Engineers
Commercial Vehicle Executive Council
More activity by Mihai
-
Industry tested! We had an exciting event at our Marshall Proving Grounds with industry insiders test driving a Class 7 electric vehicle powered by…
Industry tested! We had an exciting event at our Marshall Proving Grounds with industry insiders test driving a Class 7 electric vehicle powered by…
Liked by Mihai Dorobantu
-
Proud to be again on the stage at the 24th #StuttgartSymposium. In name of Eaton and the team I am presenting our Supercharger Boosting on H2 ICE…
Proud to be again on the stage at the 24th #StuttgartSymposium. In name of Eaton and the team I am presenting our Supercharger Boosting on H2 ICE…
Liked by Mihai Dorobantu
-
I'm thrilled to share that I have been promoted to the position of Technology Manager for EV Charging at Eaton Research Lab (ERL), Eaton. In this…
I'm thrilled to share that I have been promoted to the position of Technology Manager for EV Charging at Eaton Research Lab (ERL), Eaton. In this…
Liked by Mihai Dorobantu
-
Last week, I was honored to be inducted along with my colleague Amit Surana into the Connecticut Academy of Science and Engineering. Many thanks to…
Last week, I was honored to be inducted along with my colleague Amit Surana into the Connecticut Academy of Science and Engineering. Many thanks to…
Liked by Mihai Dorobantu
-
Congratulations Chris Sharp for being inducted as a SAE Fellow on April 15th, 2024. Chris was recognized for reducing vehicle emissions & GHG by…
Congratulations Chris Sharp for being inducted as a SAE Fellow on April 15th, 2024. Chris was recognized for reducing vehicle emissions & GHG by…
Liked by Mihai Dorobantu
-
Never in his wildest dreams did Mike Roeth expect to be invited to help organize an event at the White House. Yet that is exactly what happened…
Never in his wildest dreams did Mike Roeth expect to be invited to help organize an event at the White House. Yet that is exactly what happened…
Liked by Mihai Dorobantu
Other similar profiles
Explore collaborative articles
We’re unlocking community knowledge in a new way. Experts add insights directly into each article, started with the help of AI.
Explore MoreOthers named Mihai Dorobantu
-
Mihai Dorobantu
-
Mihai Dorobantu
-
Mihai Dorobantu
RPD Finance , Sales Head
-
Mihai Dorobanțu
Digital Marketing Specialist at MPR Agency - GLOBALHealthPR Partner
39 others named Mihai Dorobantu are on LinkedIn
See others named Mihai Dorobantu