Engine control apparatus
A technology for controlling equipment and engines, applied in the directions of engine control, mechanical equipment, engine components, etc., can solve the problems of not providing brake assistance, actuating the brake pedal, and unable to reliably ensure the continuation of brake assistance, and achieve improved performance. The effect of fuel economy
Inactive Publication Date: 2013-08-14
DENSO CORP
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Problems solved by technology
The purpose of this proposal is to prevent the problem that the driver of the vehicle actuates the brake pedal after the engine has been automatically shut down and may be concerned that the normal level of brake assistance is not being provided due to an excessive drop in booster pressure
[0005] However, with this method utilizing a pressure sensor for detecting the level of the booster pressure, it may not be possible to obtain the actual value of the booster pressure, for example when the pressure sensor fails
This reduces the detection accuracy to the point that the condition will not be detected even if the booster pressure has been reduced too much
Thus, the continuation of the normal degree of brake assistance after the automatic engine stop operation cannot be reliably ensured
Method used
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Embodiment Construction
[0025] Reference will first be made to the figure 1 An embodiment of the engine control system will be described. The operation of this system is based on an ECU (Electronic Control Unit) 20 having various control functions including control of a fuel injection amount, control of ignition timing, idling stop control, and the like.
[0026] exist figure 1 Among them, the engine 10 is a 4-cylinder internal combustion engine, the 4-cylinder internal combustion engine has a fuel injector 11 and an ignition unit 11, wherein the fuel injector 11 is used to inject fuel into the cylinder, and the ignition unit 12 generates The ignition timing produces a high voltage of spark in each spark plug of the cylinder. Engine 10 also includes a throttle valve (not shown in the drawings) that is actuated by the operator of the vehicle by depressing the accelerator pedal for controlling the intake air into each of said cylinders. Rate. The engine 10 is further provided with a starting device...
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On a vehicle equipped with a vacuum-assist type of brake booster utilizing the intake air pressure of the vehicle engine, an engine control apparatus automatically stops the engine under certain conditions and subsequently automatically restarts the engine if it is determined that the brake booster pressure has fallen below a predetermined value. The engine control apparatus also effects such automatic restarting if a predetermined maximum time interval has elapsed since the automatic engine stop occurred. This ensures that even when the booster pressure value cannot be reliably obtained after an automatic engine stop has occurred, the engine will be restarted before the booster pressure falls excessively.
Description
technical field [0001] The present invention relates to an engine control apparatus for an internal combustion engine of a vehicle, and particularly to an engine control apparatus having an idling stop function. Background technique [0002] Various types of vehicle engine control devices are known which have an idle stop function by which the engine is activated when the device detects a condition of the first type (eg application of the vehicle brakes when the vehicle speed is low or when the vehicle is stopped) Automatic shutdown and automatic restart upon detection of a second type of condition (eg, actuation of the accelerator pedal). This serves to reduce fuel consumption by reducing the extent to which the engine is idling. [0003] Motor vehicles are often equipped with vacuum-assisted brake assist systems to increase the force exerted by the driver of the vehicle in depressing the brake pedal. This system uses a brake booster that utilizes the difference between a...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F02D29/02
CPCF02N2200/0807F02N2200/0801F02N11/084Y02T10/48F02D45/00F02N2300/2011Y02T10/40
Inventor 水野觉河原研司
Owner DENSO CORP