Electrically regenerative engine retarder and control method thereof

Abstract

The invention discloses an electrically regenerative engine retarder and a control method thereof. A retarder gear selecting handle, an engine speed sensor, a slider reversing sensor, and a stored energy state sensor output a gear signal of the gear selecting handle, an engine speed signal, a reversing signal of a linear generator slider and a stored energy state signal of an energy storage device to a signal processing circuit respectively, the signal processing circuit outputs the signals to an electronic control unit (ECU), and the ECU outputs a control signal to a flow divider valve driving circuit to adjust the openness of a flow divider valve; the ECU outputs the control signal to a reversing valve driving circuit according to the reversing signal of the linear generator slider to drive a reversing valve to change the working position, so that the linear generator slider does reciprocating linear motion, the vehicle kinetic energy absorbed by tail gas of an engine is transformedinto electric energy; therefore, fuel oil economy of a vehicle is improved and energy resources are saved by electric energy regeneration technology, and the regenerated energy is electric energy which is easy to utilize.

Description

technical field [0001] The invention relates to an engine braking technology capable of realizing braking energy recovery, in particular to an engine retarder adopting electric energy regeneration technology and a control method thereof. Background technique [0002] Commonly used engine retarders on vehicles include engine leakage retarders, engine decompression retarders and other forms. When the engine retarder is working, by changing the valve timing or valve timing and lift under the driving condition of the engine, the engine is temporarily converted into an air compressor to assist the main braking system of the car in braking. The braking power of a properly designed engine retarder is basically equal to the driving power, and may even exceed the driving power. In order to improve the performance of the engine retarder, reduce the number and size of parts and reduce the weight of the engine, US patents US6450144B2 and US6691674B2 disclose a retarder structure integr...

AI Technical Summary

Problems solved by technology

However, the braking energy of the engine retarder disclosed in the above-mentioned U.S. patent is transferred to the atmosphere through high-pressure braking gas, and the braking energy has not been effectively utilized.

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