Abstract:
PROBLEM TO BE SOLVED: To prevent degradation of emission by detecting excessive air-fuel ratio unevenness between cylinders, and to take measures to meet such the situation.SOLUTION: A fuel injection amount control device (control device) performs the feedback correction of the amount of the fuel to be injected from a fuel injection valve 33 based on the output value of an upstream side air-fuel ratio sensor 56 so that the air-fuel ratio of exhaust gas flowing into a three-element catalyst 43 is coincident with the target value. The control device 70 acquires the air-fuel ratio imbalance index value which is increased more as the degree of unevenness of the air-fuel ratio between cylinders is increased on the basis of the output value of the upstream side air-fuel ratio sensor, calculates an imbalance rich correction amount based on the air-fuel ratio imbalance index value, and corrects the air-fuel ratio of the engine to the rich side by the imbalance rich correction amount. However, during the predetermined period after starting the engine, since the air-fuel ratio of the engine is corrected to the rich side by the start correction amount, the control device performs reduction correction of the imbalance rich correction amount.
Abstract:
PROBLEM TO BE SOLVED: To eliminate air pockets in two system pipes without spouting fuel in an internal combustion engine including the two system fuel supply pipes. SOLUTION: A fuel supply system 11 is provided with a check valve 412 in a low pressure delivery communication pipe 410 and a check valve 422 in a pump supply pipe 420. The check valve 412 does not allow fuel to flow from a low pressure delivery pipe 122 side to a low pressure supply pipe 400 side. The check valve 422 does not allow fuel to flow from the pump supply pipe 420 side to the low pressure supply pipe 400 side. An engine ECU 10 opens a cylinder injection injector 110 and a suction air passage injection injector 120 for dummy injection after operating a feed pump 100 for about one second when it is judged that air bleeding is necessary. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To prevent the vibration of a vehicle due to counter torque in a vehicle where the output of counter torque to cancel torque at the time of initial explosion of an internal combustion engine from a motor is controlled. SOLUTION: This hybrid card 20 includes an engine 22 and motors MG1 and MG2 for making the motor MG2 output counter torque to cancel torque in the case of initial explosion of the engine 22. A hybrid ECU 70 judges whether or not predetermined conditions under which torque at the time of initial explosion of the engine 22 is estimated to be small are satisfied, and when judging that the predetermined conditions are satisfied, the hybrid ECU 70 inhibits the output of the counter torque. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To achieve proper learning by suppressing the variation of the learning value of idle controlled variables in a vehicle equipped with: an engine which is able to output a power to a vehicle axial side; and a motor which is able to output a power through a transmission to the vehicle axial side. SOLUTION: When the idle operation of an engine is performed under traveling (S410, S420), and a transmission is put in the status of an Lo gear not just before Hi-Low speed change has been performed (S430 to S450), a value 1 is set in a learning decision flag F1 (step S460), and the learning of idle controlled variables is executed. Thus, it is possible to suppress the variation of a learning value based on the status of a transmission in comparison with the case of achieving learning regardless of the Lo gear and Hi gear, and to achieve proper learning. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To suppress the purification performance of an exhaust gas purifying catalyst from being degraded when the arbitrary selection of driving conditions to specify the settable range of a request driving force requested for traveling is permitted. SOLUTION: In a hybrid car 20, when a deceleration request based on accelerator OFF is made when S position is selected where the arbitrary selection of shift positions SP1 to SP6 is permitted, and fuel cut can not be inhibited from the status of a battery 50, an engine 22 and motors MG2 and MG2 are controlled so that a driving force based on a request torque Tr* can be output according to fuel cut (S410, S420, S360 to S400). When the fuel cut can be inhibited from the status of the battery 50, the engine 22 actually and independently operates at the target speed Ne0, and the engine 22 and the motors MG1 and MG2 are controlled so that the driving force based on the request torque Tr* can be outputted (S340 to S400). COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To inhibit excess supply of fuel at a time of start of an internal combustion engine. SOLUTION: An automobile 20 is provided with an engine 22 provided with a cylinder fuel injection valve 25 connected to a delivery pipe 66 provided with a fuel pressure sensor 69 and injecting fuel supplied by a fuel pump 62. The automobile 20 improves startability of the engine 22 by driving a fuel pump 62 before driving a high pressure pump 64 and performing pre-supply process supplying fuel to the high pressure pump 64 when it is judged that fuel does not leak from the cylinder fuel injection valve 25 at a time of start of the engine 22. On the other hand, the pre-supply process is not performed to inhibit fuel leak from the cylinder fuel injection valve 25 when it is judged that fuel leaks from the cylinder fuel injection valve 25. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a fuel injection controller for an internal combustion engine capable of suppressing excessive amount of fuel injection while suppressing a lean air fuel ratio in correcting an increment in target injection amount at start of the engine. SOLUTION: An electronic controller corrects an increment in target injection amount over a predetermined increment correction period after starting the port injection gasoline engine, and reduces incremental correction amount gradually after going through every combustion cycle (refer to the two-dot chain line). The electronic controller corrects an increment in target injection amount for the first time combustion cycle such that fuel required for initial explosion is supplied to a combustion chamber. Furthermore, the electronic controller reduces incremental correction amount for a predetermined period (transport lag combustion period) near the first time combustion cycle out of the increment correction period of target injection amount (refer to the full line), and decreases the degree of reduction gradually after going through the second and subsequent each combustion cycle. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To quickly improve engine output after starting, while minimizing the deterioration in fuel economy, and reduce vibration when starting an engine. SOLUTION: As indicated in Fig. 4, this valve timing control device has a mechanical pump MOP for supplying fluid by acquiring driving force by rotation of a crankshaft, an electric pump EOP for supplying the fluid by acquiring driving force by battery electric power, a variable valve timing mechanism capable of changing the operation timing of an intake valve by relatively rotating a camshaft to the crankshaft by pressure of the fluid supplied by the mechanical pump and/or the electric pump, and an electric pump driving control means for controlling the driving force of the electric pump EOP in response to a degree of an acceleration request for a vehicle when stopping the engine. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a fuel injection device for a vehicle capable of maintaining good exhaust emission property upon starting of an engine by improving oil tightness in each injector while the vehicle operation is stopped. SOLUTION: On the downstream side of a low pressure fuel pump 180 for discharging fuel inside a fuel tank 200 at a predetermined pressure, a low pressure delivery pipe 160 which is a tubular body having the injector 120 for intake air passage injection formed therein, a fuel pressure regulator 170, a high pressure fuel pump 155, a high pressure delivery pipe 130 which is a tubular body having the injector 110 for cylinder injection formed therein, and an electromagnetic relief valve 210 are connected in series. By releasing the electromagnetic relief valve 210 when operation of the engine is stopped, fuel pressure inside the high pressure delivery pipe 130 can be lowered corresponding to the stop of the low pressure fuel pump 180, so that oil tightness of each of the injectors 110 and 120 can be secured. COPYRIGHT: (C)2006,JPO&NCIPI