Systems and methods for operating a spark ignition engine that includes a particulate filter in the engine's exhaust system are described. In one example, the spark ignition engine is prevented from exceeding a threshold engine load when the engine is supplying power to an electric machine so that engine emissions may be reduced.

A vehicle 1 comprises an internal combustion engine 10, a filter 61, a motor 16, a battery 20, a trapped amount calculating part 91 configured to calculate an amount of particulate matter, a state-of-charge estimating part 92 configured to estimate a state of charge of the battery, an engine load setting part 93 configured to set an engine load, and an internal combustion engine control part 94. The engine load setting part is configured to make the engine load increase in the case where the amount of the particulate matter is relatively large compared to the case where the amount of the particulate matter is relatively small when it is estimated that the battery can be charged. The engine load setting part is configured to change an amount of increase of the engine load in accordance with the amount of the particulate matter when making the engine load increase.

A powertrain for a machine includes an internal combustion engine, an aftertreatment system including a selective catalytic reduction (SCR) catalyst for treating exhaust gases from the internal combustion engine, and a continuously variable transmission operatively coupled to the internal combustion engine. An electronic controller can measure a catalyst temperature of the SCR catalyst and can inversely adjust an engine speed and a CVT output to selectively regulate a catalyst temperature of the SCR catalyst. In an embodiment, the CVT may be a hydro-mechanical transmission including a hydrostatic transmission and a mechanical transmission.

The invention relates to a method and a control unit for controlling a hybrid driveline comprising an internal combustion engine (ICE) and at least one alternative propulsion unit. The method involves monitoring a predetermined first parameter related to vehicle operation and a second parameter related to the state of an exhaust particle filter, wherein a particle filter regeneration is scheduled when the predetermined second threshold is exceeded. If the first parameter has exceeded or is expected to exceed a predetermined first threshold within a set time period prior to a scheduled particle filter regeneration; then initiation of an on-board diagnostic process is delayed until the particle filter regeneration has been completed. Subsequently, the hybrid driveline is controlled to perform a particulate filter regeneration at the scheduled time and the ICE is operated to perform the on-board diagnostic process.

A vehicular breaking force control system includes: a plurality of actuators capable of generating a braking force for a vehicle; a coasting state detection unit configured to detect that a coasting state has been established; a target braking force calculation unit configured to calculate a target braking force on the basis of a state of the vehicle when the coasting state detection unit detects that the coasting state has been established; and a braking force distribution control unit configured to determine a distribution braking force that is a braking force to be caused to be generated by each actuator, such that the distribution braking force is equal to or less than a braking force generable by the actuator and a sum of the distribution braking forces is equal to the target braking force, and to perform control of causing each actuator to generate the distribution braking force.

During a hybrid drive, a hybrid vehicle sets an engine required power based on a driving required power and controls an engine to output the engine required power, while controlling a motor to drive the hybrid vehicle with the driving required power. When a catalyst temperature of an exhaust emission control device is equal to or lower than a predetermined temperature that requires warming up, in the state that an output upper limit power which a power storage device is allowed to output is equal to or larger than a predetermined power, the hybrid vehicle sets a power calculated by subtracting the output upper limit power from the driving required power, to the engine required power. In the state that the output upper limit power is smaller than the predetermined power, the hybrid vehicle sets the driving required power to the engine required power.

A hybrid vehicle includes a multi-cylinder engine, an exhaust gas control apparatus including a catalyst for removing exhaust gas from the multi-cylinder engine, an electric motor, and a control device configured to execute catalyst temperature increase control for stopping fuel supply to at least one cylinder and making an air-fuel ratio in each of remaining cylinders rich in a case where a temperature increase of a catalyst is requested during a load operation of the multi-cylinder engine, execute control such that an electric motor supplements insufficient drive power due to the execution of the catalyst temperature increase control, and change the air-fuel ratio in at least one of the remaining cylinders to a lean side after a temperature of the exhaust gas control apparatus becomes equal to or higher than a determination threshold value during the execution of the catalyst temperature increase control.

A control device for an internal combustion engine includes processing circuitry. The processing circuitry is configured to execute a purging process that draws the fuel vapor trapped in the canister into the intake passage by controlling the purge valve, a fuel feeding process that feeds the air-fuel mixture, which includes the fuel supplied to the cylinder, to the exhaust passage without burning the air-fuel mixture in the cylinder, and a fuel supply process that supplies fuel to the cylinder when the fuel feeding process is being performed. The processing circuitry is further configured to perform the fuel supply process by performing the purging process.

An ECU is configured to control an SOC control center of a battery and perform an engine torque suppression control. The engine torque suppression control is a control that suppresses output of an engine during a predetermined period of time after starting a system, and causes motor generators to output torque supplementing the suppressed output of the engine. When a deposition amount of PM on a filter exceeds a first specified amount, the ECU raises the SOC control center by controlling the motor generators before stopping the system as compared to when the deposition amount of PM is lower than a specified amount, and performs the engine torque suppression control at a next start after stopping the system.

A hybrid vehicle includes a motor serving as a drive source, a battery configured to supply electric power to the motor, and an engine capable of supplying electric power to the battery by driving a generator. In the hybrid vehicle, the engine is operated when a magnitude of background noise exceeds a noise threshold value, in a case where an operation parameter for operating the engine when a value of the operation parameter falls below a forced operating threshold value is larger than the forced operating threshold value, the operation parameter being a parameter whose value increases as an operation time of the engine increases.