Cummins

The present invention relates to thermal management systems for batteries, particularly batteries used in electric vehicles (EVs), stationary generators, or other high-performance energy storage applications. An energy storage device including a major component that includes first and second major subcomponents configured to interconnect at a thermally isolable interface arranged therebetween. The first and second major subcomponents being constituent components of an electrochemical system that is configured to store energy for the energy storage device and cooled via fluid flow in a primary outlet direction across the thermally isolable interface. The first and second major subcomponents being arranged such that the first major subcomponent is thermally isolable from the second major subcomponent for a minimum isolation duration when the energy storage device experiences a detrimental thermal event.

A battery system with a thermal management architecture is disclosed that enables selective thermal regulation across multiple independent zones of a battery cell arrangement. The system includes a plurality of thermal regulation zones defined within the periphery of the battery cell structure. A thermal exchange media, such as a dielectric coolant, is selectively routed through these zones using independently controllable inlet and outlet ports connected to flow control manifolds. This enables targeted cooling based on real-time or predicted thermal demands in specific battery regions.

A system includes a controller communicably coupled to an engine. The controller is configured to perform operations comprising receiving a temperature value regarding an aftertreatment system; receiving a regeneration power value regarding a braking event; comparing the temperature value to a temperature threshold. Responsive to the temperature value being above the temperature threshold and the regeneration power value being at or above a first power threshold, the controller is configured to cause one or more electric machines to rotate the engine during the braking event. Responsive to the temperature value being below the temperature threshold and the regeneration power value being at or above a second power threshold, the controller is configured to cause the one or more electric machines to rotate the engine, and activate a heater associated with the aftertreatment system to heat the aftertreatment system during the braking event.

A system and method of controlling voltage in a power system by automatically manipulating current with a power conversion device (206) in response to a measured voltage value within the power system meeting or exceeding at least one predetermined threshold. The power conversion device (206) may also automatically disconnect from the power system when the measured voltage value meets or exceeds an over-voltage protection threshold. Current manipulation and disconnect from the power system may occur without receiving a command from a supervisory controller.

Engine systems are disclosure that include a multi-fuel engine operable to selectably combust varying proportions of a first type of fuel and a second type of fuel, such as gaseous hydrogen fuel. An electronic control system and method control the substitution of the hydrogen fuel for emissions reduction and/or aftertreatment regeneration. Substitution of hydrogen fuel may also be monitored and controlled to manage emissions credits.

A system and method are disclosed for providing a fuel mixture to a fuel cell. The system and method recirculate at least a portion of the fuel mixture output from a fuel ejector that is to be supplied to the fuel cell but relieved due to an over-pressure condition upstream of the fuel cell. The relieved fuel mixture is at least partially returned to the fuel ejector in a controlled manner so that the relieved fuel mixture is not wasted and able to be re-supplied to the fuel cell to produce electricity.

A connecting rod includes a connecting rod body having a piston end, an opposing crank end, and a shank extending between the piston and crank ends. The connecting rod body aligns along a longitudinal plane that extends between respective centers of the piston and crank ends. The shank has a cross-sectional area that is symmetric about the longitudinal plane. The shank includes a web having a web wall that includes a central portion. The web wall defines a pair of first cavities and a pair of second cavities wherein the central portion is positioned between the pair of first cavities and the pair of second cavities such that the first cavities are offset from the second cavities. The first cavities are larger than the second cavities. The first cavities are positioned closer to the piston end and the second cavities are positioned closer to the crank end.

A vehicle system includes a powertrain including a prime mover system including an electric power system, the electric power system including an energy storage system (ESS), power electronics operatively coupled with the ESS, and an electric machine operatively coupled with the power electronics. One or more ground engaging wheels operatively coupled with the prime mover system. An electronic control system in operative communication with the prime mover system, the electronic control system being configured to: determine, prior to reaching a downhill route segment, a pre-downhill target vehicle speed, a pre-downhill electric power system target state, and a downhill vehicle speed target, control the vehicle system to achieve the pre-downhill target vehicle speed and the pre-downhill electric power system target state prior to or upon reaching the downhill route segment, and operate the electric power system to perform electric braking during the downhill route segment to control vehicle speed according to the downhill vehicle speed target.

A fuel injector device includes a nozzle injector body and a valve needle. The nozzle injector body includes an inner annular surface that defines an injector cavity connected to a sac having an injector orifice. The sac includes a sac surface that defines a sac diameter and a sac volume wherein the sac volume is defined by the sac surface, the relief portion, and the needle tip. The valve needle reciprocates in the injector cavity to control fuel delivery through the injector orifice. The valve needle includes a needle tip portion having a needle seat transition edge positioned between a needle seat portion that extends at a needle seat angle and a relief portion that extends at a relief seat angle. The relief seat angle is greater than the needle seat angle to thereby increase a sac volume when the nozzle seat portion engages the nozzle seat.

A direct current (DC) power supply (202) is disclosed. Embodiments comprise a first load (204) that optionally includes a battery, an alternator (206), and a switch (208). The alternator (206) is connected in series to the first load (204). The switch (208) is configured to receive power control signals, and to couple the first load and alternator to a second load (214).