摘要:
An object of the present invention is to provide a compression-ignition internal combustion engine capable of improving its engine performance by appropriately setting ignition timing. In order to attain the above-mentioned object, the compression-ignition internal combustion engine comprises a valve mechanism control means for controlling opening and closing timings of a valve mechanism including an intake valve and an exhaust valve arranged in a cylinder of the internal combustion engine. Using the valve mechanism control means, the compression pressure can be controlled corresponding to an operating condition of the engine, and accordingly the auto-ignition timing can be controlled corresponding to the operating condition of the engine.
摘要:
In order to provide a system that lower NOx emission and an improved fuel consumption are obtained by making the igniting control possible in the wide operation range by performing the fuel injection and the ultra lean burning with the homogeneous air-fuel mixture, in the engine having the compression igniting mode, in the in-cylinder fuel injection engine having the compression igniting mode, means for performing the first fuel injection for the initial combustion speed control before igniting and the second fuel injection for the engine torque control after that, are provided. The second fuel injection ratio for the engine torque control is increased according to the engine torque. Furthermore, in order to improve the igniting, the igniting trigger means is provided in the in-cylinder fuel injection engine having a compression igniting mode and the igniting trigger is added by the igniting trigger means after the first fuel injection.
摘要:
There is provided a cylinder injection type internal combustion engine capable of performing stratified charge operation at the time of a vehicle speed of 120 km/h and/or an engine rotational speed of 3200 rpm to enhance the fuel efficiency and/or to observe the emission regulations. In the internal combustion engine, a stratum of air and/or air flow is formed between a fuel spray injected from an injection valve and the top face of a piston and/or the wall surface of a combustion chamber, and a face shape contrived to guide the air flow is formed on the top face of the piston. Also, the stratified charge operation can be performed even at the time of cold start or cranking.
摘要:
There is provided a cylinder injection type internal combustion engine capable of performing stratified charge operation at the time of a vehicle speed of 120 km/h and/or an engine rotational speed of 3200 rpm to enhance the fuel efficiency and/or to observe the emission regulations. In the internal combustion engine, a stratum of air and/or air flow is formed between a fuel spray injected from an injection valve and the top face of a piston and/or the wall surface of a combustion chamber, and a face shape contrived to guide the air flow is formed on the top face of the piston. Also, the stratified charge operation can be performed even at the time of cold start or cranking.
摘要:
A combustion chamber is formed using a flat piston having a low cooling loss and therein a forward tumble is generated. A fuel spray is formed by a provision of a splitter which is provided to make off-set from a center of an injection port at a tip end of a tumble atomization system fuel injector. The fuel spray is divided into a fuel spray having a strong penetration force and a fuel spray having a small penetration force. The fuel spray having the strong penetration force is injected in a vicinity of an ignition plug. Accordingly, a fuel adhesion to the piston can be reduced and further a reduction of a discharge HC and a fuel consumption can be improved.
摘要:
There is provided a cylinder injection type internal combustion engine capable of performing stratified charge operation at the time of a vehicle speed of 120 km/h and/or an engine rotational speed of 3200 rpm to enhance the fuel efficiency and/or to observe the emission regulations. In the internal combustion engine, a stratum of air and/or air flow is formed between a fuel spray injected from an injection valve and the top face of a piston and/or the wall surface of a combustion chamber, and a face shape contrived to guide the air flow is formed on the top face of the piston.Also, the stratified charge operation can be performed even at the time of cold start or cranking.
摘要:
A cylinder injection engine includes a fuel injector for injecting a fuel into a combustion chamber formed between a cylinder head and a piston, an intake port opening to the combustion chamber, an intake valve disposed in the intake port, a plurality of spark plugs provided for each cylinder for effecting ignition of a mixture formed within the combustion chamber, an external EGR valve having a function of EGR amount control to the cylinder, and a gas flow control valve. The engine has air/fuel ratio mode setting and ignition mode setting.
摘要:
There is provided a cylinder injection type internal combustion engine capable of performing stratified charge operation at the time of a vehicle speed of 120 km/h and/or an engine rotational speed of 3200 rpm to enhance the fuel efficiency and/or to observe the emission regulations. In the internal combustion engine, a stratum of air and/or air flow is formed between a fuel spray injected from an injection valve and the top face of a piston and/or the wall surface of a combustion chamber, and a face shape contrived to guide the air flow is formed on the top face of the piston. Also, the stratified charge operation can be performed even at the time of cold start or cranking.
摘要:
A control method of an internal combustion engine with which braking force while reducing the speed of the motor vehicle can be established by generating pumping loss effectively by using a variable valve mechanism enabling to control arbitrarily the open-close timing and the lift amount of air intake and exhaust valves of the engine. When the break step-on force detection means detects a step-on force on a brake and an operation of the anti-lock brake system is selected, at least one of the intake valve or the exhaust valve is made close, another one not closed of the intake valve or the exhaust valve is made open once in a single revolution of the engine while a piston moves from a top dead center to a bottom dead center, and a lift of the valve is controlled to be a designated value.
摘要:
The amount of air to be introduced is controlled for each cylinder, whereby it is intended to make it possible to control the torque generated in each cylinder, perform an ultra-lean burn operation, purify the exhaust gas, and increase the output of an engine. An air flow control valve adapted to be on-off controlled in accordance with an operated quantity of an accelerator pedal is disposed in each branch pipe or intake port. The air flow control valve may be a throttle valve disposed in each branch pipe or it may be a variable intake valve for opening and closing the intake port.