Abstract:
An internal combustion engine includes a circulation system which circulates a heat medium, a cylinder head part channel which circulates the heat medium into a cylinder head, a cylinder block part channel which circulates the heat medium into a cylinder block, a connecting channel which connects the cylinder head part channel with the cylinder block part channel, a heat supply device that supplies heat accumulated in the regenerator to the internal combustion engine, and restraining device that restrains heat circulation in the connecting channel when heat is supplied by the heat supply device or the internal combustion engine is under cold conditions.
Abstract:
An object is to reduce the increase in the fuel consumption or the increase in emissions caused by processing for raising the temperature of an NOx catalyst in an exhaust gas purification apparatus for an internal combustion engine having the NOx catalyst arranged in an exhaust passage of the internal combustion engine. To achieve the above object, an exhaust gas purification apparatus for an internal combustion engine according to the present invention executes processing for raising the temperature of the NOx catalyst on condition that a temperature change ratio with a predetermined amount of assumed temperature rise of the NOx catalyst is equal to or higher than a reference value. According to the present invention, it is possible to activate the NOx quickly while keeping the unwanted increase in the fuel consumption and emissions caused by the temperature raising processing small.
Abstract:
A control apparatus for an internal combustion engine is provided which can accurately correct a valve timing deviation of an intake valve caused by a variable operating angle mechanism or variable phase mechanism.A variable operating angle mechanism (28a) for making the operating angle of an intake valve (24) variable is provided. Operating angle command values (operating angles 1 and 3) of two points in front and back at which the intake air amount is decreased by a predetermined amount with respect to the value that is judged to be a maximum value of the intake air amount when the operating angle (command value) is kept changing, are acquired. Then, an intermediate value which is at an equal distance from the operating angle command values of the two points is calculated as the maximum operating angle command value. Then, this maximum operating angle command value is compared with a reference characteristic to execute the calculation of the deviation amount of the valve timing and the correction of the deviation.
Abstract:
An ammonia burning internal combustion engine can feed ammonia and a highly combustible substance burning easier than ammonia to a combustion chamber. When the amount of ammonia fed into the combustion chamber is increased or when the ratio of the amount of the ammonia to the total amount of the ammonia and the highly combustible substance fed into the combustion chamber is increased, the operating parameters of the internal combustion engine are controlled so the air-fuel mixture fed into the combustion chamber is made easier to burn. As a result, an ammonia burning internal combustion engine designed to suppress a drop in combustibility of auxiliary fuel due to ammonia, can be provided.
Abstract:
The subject is to efficiently detect the sticking of changeover valves for realizing a plurality of supercharging modes in a vehicle provided with a plurality of superchargers, and also to realize preferable fail-safe in cases where the sticking is detected. In a vehicle, which is provided with: a primary turbo and a secondary turbo, each of which is of an exhaust driven type; an exhaust changeover valve and an intake changeover valve, which are placed in a secondary exhaust passage and a secondary intake passage corresponding to the secondary turbo, respectively; and an intake bypass valve placed in an intake bypass passage, an ECU sets the opening/closing state of each changeover valve to an opening/closing state corresponding to a twin turbo mode at the time of engine stop, and it uses the drive control of each changeover valve which is necessitated in the transition to a single turbo mode at the engine start, thereby performing the sticking detection of the changeover valve at the same time.
Abstract:
An electronic control unit (ECU) of an engine system starts a control (preheat) that supplies heat reserving hot water stored in a heat accumulating device to an engine prior to an engine start. The ECU determines a time that continues the preheat on the basis of a cooling water temperature of the engine so as to execute the engine start after a warming-up of the engine is reliably finished. Further, during the execution of the preheat, a lighting lamp is turned on, and that incidence is recognized to a driver. When the preheat is completed, the ECU automatically starts the engine.
Abstract:
An object of the present invention is to suppress a reduction in an NOX purification ratio when an addition is implemented to prevent a blockage from occurring in a reducing agent addition valve. A fuel addition valve, a catalyst having an oxidation capacity, and a selective reduction type NOX catalyst are provided in sequence in an exhaust passage of an internal combustion engine, and when a temperature of the selective reduction type NOX catalyst is within a predetermined temperature range while a predetermined condition for injecting fuel from the fuel addition valve is established, an amount of fuel injected from the fuel addition valve is reduced below an amount of fuel injected when the temperature of the selective reduction type NOX catalyst is outside the predetermined temperature range.
Abstract:
The present invention pertains to a control system for an internal combustion engine equipped with an exhaust gas purification apparatus including an NOx catalyst having an ability of reducing NOx and a particulate filter, and its object is to prevent deterioration in the acceleration performance while preventing an increase in exhaust emissions when the temperature of the NOx catalyst is low. The control system for an internal combustion engine according to the present invention includes an exhaust gas purification apparatus provided in an exhaust passage of the internal combustion engine and including an NOx catalyst having an ability of reducing NOx and a particulate filter, intake air quantity restriction means for restricting the intake air quantity in relation to the temperature of the NOx catalyst, fuel restriction means for restricting the fuel injection quantity in relation to the intake air quantity of the internal combustion engine, and trapped PM amount obtaining means for obtaining the amount of PM trapped in the particulate filter. When the amount of PM trapped in the particulate filter is not larger than a predetermined amount and the internal combustion engine is in an accelerating operation state, the control system corrects a restriction value of the fuel injection quantity in relation to the intake air quantity of the internal combustion engine and the temperature of the NOx catalyst.
Abstract:
A control apparatus for an internal combustion engine is provided which can accurately correct a valve timing deviation of an intake valve caused by a variable operating angle mechanism or variable phase mechanism.A variable operating angle mechanism (28a) for making the operating angle of an intake valve (24) variable is provided. Operating angle command values (operating angles 1 and 3) of two points in front and back at which the intake air amount is decreased by a predetermined amount with respect to the value that is judged to be a maximum value of the intake air amount when the operating angle (command value) is kept changing, are acquired. Then, an intermediate value which is at an equal distance from the operating angle command values of the two points is calculated as the maximum operating angle command value. Then, this maximum operating angle command value is compared with a reference characteristic to execute the calculation of the deviation amount of the valve timing and the correction of the deviation.
Abstract:
A supercharger control device for an internal combustion engine is preferably applied to a system having a first supercharger and a second supercharger. A switching supercharging pressure setting unit sets a switching supercharging pressure used in case of switching a mode for operating the first supercharger and the second supercharger, based on a difference between a target supercharging pressure and an actual supercharging pressure. When the actual supercharging pressure reaches the switching supercharging pressure, a switching control unit performs a control of switching the mode. Therefore, it becomes possible to appropriately prevent the overshoot of the supercharging pressure at the time of switching the mode.