Auxiliary braking overspeed warning method and device suitable for electronically controlled engines
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An electronically controlled engine and auxiliary braking technology, which is applied in engine control, machine/engine, mechanical equipment, etc., can solve problems such as high cost, potential safety hazards, and inconsistent overspeed limits, so as to reduce costs, prevent hidden dangers, and prevent The effect that occurs
Active Publication Date: 2018-03-13
WEICHAI POWER CO LTD
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But this mainly depends on the driver's experience and willingness, and there are potential safety hazards
Some of the existing technologies reduce the speed by limiting the fuel injection, but they are not suitable for the engine anti-drag state, because the fuel injection has already been stopped during braking; The overspeed limits are not uniform, nor can they play a due role in helping the driving safety under the state of engine-assisted braking; some need to use more special control components, resulting in higher costs
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[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the Some, but not all, embodiments are invented. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0021] see figure 1 , this embodiment discloses an auxiliary braking overspeed warning device suitable for electronically controlled engines, including:
[0022] ECU (Electronic Control Unit), speed sensor and alarm; among them,
[0023] The ECU includes a first sensor, a second sensor, an OR gate H, a first comparator C1, an AND gate Y, a delayer D, an RS flip-flop R...
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Abstract
The invention discloses an assisted brake overspeed warning method and an assisted brake overspeed warning device applicable to an electric-control engine. The device comprises an ECU, a rotating speed sensor and an alarm, wherein the ECU comprises a first sensor, a second sensor, an OR gate, a first comparator, an AND gate, a delayer, an RS trigger, a second comparator, a first selecting switch, a third comparator, a second selecting switch, a fourth comparator, a third selecting switch, a fifth comparator, a fourth selecting switch, a signal trigger and a fifth selecting switch. The ECU disclosed by the invention can recognize a brake state, and after the rotating speed of the engine exceeds a limit value, the ECU emits a corresponding signal, and the signal is converted into an alarm signal which can be directly recognized by a driver via the alarm, thus reminding the driver of driving safely in engine braking, and therefore, potential safety hazards are prevented, and cost is lowered.
Description
technical field [0001] The invention relates to the field of engine auxiliary braking, in particular to an auxiliary braking overspeed warning method and device suitable for electronically controlled engines. Background technique [0002] After the engine auxiliary braking is activated, the engine is driven by the inertial force and gravity of the vehicle, and the speed will increase accordingly, even exceeding the speed that the engine can bear. Regardless of whether it is a mechanical pump diesel engine or an electronically controlled diesel engine, the engine fuel system will automatically stop injecting fuel. If the speed continues to rise, the driver can only rely on the driver to actively step on the brakes to reduce the speed of the vehicle, thereby reducing the engine speed. But this mainly depends on the driver's experience and willingness, and there are potential safety hazards. Some of the existing technologies reduce the speed by limiting the fuel injection, but...
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