An engine control method and device
An engine and preset technology, applied in the direction of engine control, combustion engine, machine/engine, etc., can solve problems such as vehicle intrusion, and achieve the effect of avoiding vehicle intrusion
Active Publication Date: 2022-07-08
GREAT WALL MOTOR CO LTD
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Problems solved by technology
[0005] In view of this, the present invention aims to propose an engine control method and device to solve the problem that the vehicle crashes due to the current intake manifold pressure being higher than the target intake manifold pressure when the existing vehicle is reaccelerated from the coasting state. moving problem
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[0078] It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.
[0079] In this embodiment, the working state of the engine is divided into a full cylinder working state and a random cylinder deactivation working state. Among them, the full-cylinder working state is the state in which all cylinders of the engine are working; and the random cylinder deactivation working state refers to the control of the engine with different cylinder deactivation rates and deactivation rates according to the torque demand under different loads during the driving process of the vehicle. Cylinder sequence work, that is, the vehicle will randomly control some of the cylinders to stop working according to different torque requirements, so as to realize the work with as few cylinders as possible on the premise of meeting the torque demand, so that the engine can try to achieve the best wo...
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The engine control method and device provided by the embodiments of the present invention are applied to an engine control unit in a vehicle. The method includes: when a target cylinder in a cylinder deactivation state in the engine needs to be switched to a normal state, determining a target rotational speed of the engine of the vehicle, a target cylinder torque and the current intake manifold pressure of the target cylinder; determine the target intake manifold pressure of the target cylinder according to the target speed and target torque; control the intake valve and exhaust valve of the target cylinder to switch from the stop state to the running state; when the target After the current intake manifold pressure of the cylinder is adjusted to the target intake manifold pressure, the throttle valve, fuel injector and spark plug of the target cylinder are controlled to switch to the running state. By controlling the intake and exhaust valves of the target cylinder to operate, the excess air in the intake manifold is exhausted, so that the current intake manifold pressure of the target cylinder reaches the target intake manifold pressure required for the normal state, avoiding the need for the entire vehicle. intrusive phenomenon.
Description
technical field [0001] The present invention relates to the technical field of vehicles, and in particular, to an engine control method and device. Background technique [0002] As an important means of transportation, automobiles are widely used in all aspects of people's daily life. However, with the increasingly severe global environmental problems and energy shortages, more stringent vehicle emission standards and lower fuel consumption have become the mainstream trends in society's demand for vehicle engines. [0003] The cylinder deactivation technology is a widely used engine technology. When the engine is running with a small load, by closing the fuel supply, ignition and intake and exhaust of some cylinders, the part of the cylinders is stopped from working, so that the load of the remaining working cylinders increases. Improve the working efficiency of the engine and reduce the fuel consumption. [0004] However, when the engine using the cylinder deactivation te...
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IPC IPC(8): F02D13/06F02D17/02F02D41/04F02D35/02
CPCY02T10/40
Inventor 崔亚彬宋东先郑雨佳王丹张秀珍王彦芳
Owner GREAT WALL MOTOR CO LTD