Patent application number | Description | Published |
20090000279 | ADDITION-AMOUNT CONTROLLER FOR EXHAUST GAS PURIFYING AGENT AND EXHAUST EMISSION CONTROL SYSTEM - In an addition-amount controller for an exhaust gas purifying agent to be used for an exhaust emission control system of an engine, one mode is executed based on satisfaction of an execution condition for each mode, from among a plurality of control modes. The control modes includes a purification control mode in which an addition amount of NH | 01-01-2009 |
20090120073 | EXHAUST GAS PURIFYING APPARATUS FOR INTERNAL COMBUSTION ENGINE - An exhaust pipe is provided with an oxidation catalyst, a SCR catalyst (ammonia selective reduction catalyst), and an ammonia slip catalyst. In the exhaust pipe, the urea water adding valve is provided between the oxidation catalyst and the SCR catalyst. A NOx sensor which detects the NOx quantity in an exhaust gas is provided downstream of the SCR catalyst. An ECU controls the urea water adding valve to add the urea water to the exhaust gas. While the urea water is added to the exhaust gas, the ECU successively obtains a NOx sensor output, and computes an adding quantity command value in which the NOx sensor output becomes minimum. | 05-14-2009 |
20090301068 | EXHAUST-GAS PURIFICATION APPARATUS AND METHOD FOR PURIFYING EXHAUST GAS - A NOx catalyst is provided in an exhaust passage of an internal combustion engine for selectively purifying NOx in exhaust gas with a reducing agent. A charging unit charges the reducing agent at an upstream of the NOx catalyst. A pressurizing unit supplies the reducing agent to the charging unit. An obtaining unit detects or estimates catalyst temperature of the NOx catalyst or temperature information, which is correlated with the catalyst temperature. A particle size control unit changes reducing-agent pressure of reducing agent, which is pressurized by the pressurizing unit and supplied to the charging unit, to control an atomized particle size of the reducing agent, which is atomized from the charging unit and charged into exhaust gas, based on the catalyst temperature or the temperature information. | 12-10-2009 |
20100122525 | EXHAUST PURIFICATION CONTROL DEVICE AND EXHAUST PURIFICATION SYSTEM OF INTERNAL COMBUSTION ENGINE - If it is determined that accumulation quantity of deposit on an inner wall of an exhaust passage is equal to or larger than a predetermined value, addition quantity of urea solution from a urea solution addition valve is decreased. Thereafter, exhaust gas temperature is increased rapidly when request torque of a diesel engine increases. Thus, the deposit having accumulated on the inner wall of the exhaust passage is decomposed at once and is supplied to a urea SCR as ammonia. | 05-20-2010 |
Patent application number | Description | Published |
20110172901 | CONTROL DEVICE FOR CONTROLLING AUTOMATIC ENGINE STOP AND START - A control device performs fuel injection without cranking when engine-speed Ne is within a first-range (Ne>N | 07-14-2011 |
20110178695 | CONTROL DEVICE OF AUTOMATIC ENGINE STOP AND START - In a control device, an engine self-restart means tries the engine restart when an engine restart request is issued while the engine rotation speed is within a first rotation speed range. A pre-gear synchronizing control means executes gear rotation speed synchronization between pinion and ring gears, and then retries the engine restart when the engine restart request is issued while the engine rotation-speed is within a second rotation speed range. A pre-gear meshing control means executes gear-meshing between the pinion and ring gears and then retries the engine restart when the engine restart request is issued while the engine rotation speed is within a third rotation speed range. On detecting the engine-restart failure of the engine self-restart control, the control device prohibits the execution of pre-gear synchronizing control until a predetermined time counted form the failure detection time is elapsed, and executes the pre-gear meshing control after the predetermined time period is elapsed. | 07-21-2011 |
20140102395 | ENGINE STARTER DESIGNED TO MINIMIZE MECHANICAL NOISE AT START OF ENGINE - An engine starting system for an engine is equipped with a pinion, an electromagnetic actuator, and a controller. When energized, the electromagnetic actuator produces a magnetic attraction to move the pinion straight toward a ring gear coupled to an engine for starting the engine. The controller is designed to selectively provide a small amount of current to the electromagnetic actuator and a large amount of current to the electromagnetic actuator. When it is required to minimize the level of noise arising from mechanical contact of the pinion with the ring gear, the controller provides the small amount of current to the electromagnetic actuator to slow the movement of the pinion toward the ring gear, thereby lessening the impact of the pinion on the ring gear. | 04-17-2014 |