Controlling device of hybrid power vehicle

Abstract

The invention provides a controlling device of a hybrid power vehicle, wherein when the output of an engine is superfluous during operation, the overrun operation of the engine due to the unnecessary rising of the engine speed is prevented and the clutch of the vehicle is released at the same time. The hybrid power vehicle has an electric motor and an engine as a driving source for the driving of the vehicle. The controlling device comprises a power on-off clutch, a generator, a state value detection unit, a target state value calculation unit, and a control unit. The power on-off clutch transmits a driving force provided by the engine to the drive wheels of the vehicle. The generator is connected with the engine. The state value detection unit detects the state value of the engine. The target state value calculation unit calculates the target state value to be outputted by the engine according to the state value of the vehicle. When the power on-off clutch is turned on and the vehicle is driven to run through the driving force of the engine, if the difference between state value and the target state value reaches a specified value, the rotating speed of the engine is restrained through the generator by the control unit. When the rotating speed of the engine is restrained, the power on-off clutch is released.

Description

technical field [0001] The present invention relates to a control device for controlling an engine and a clutch in a hybrid vehicle, the hybrid vehicle having a clutch capable of turning off and turning on the driving force of the engine. Background technique [0002] For a parallel hybrid vehicle equipped with a motor (electric motor, also called an electric motor) and an engine (internal combustion engine) as power sources, a structure has been developed in which there is a disconnection between the engine and the power transmission shaft on the drive wheel side. Opening the power-on clutch can separate the engine from the power system when the engine is not used as a power source. In such a parallel hybrid vehicle, as long as the engine and engine control system (including sensors, etc.) are normal, the engine can operate with an output state close to the commanded output even if there is a response delay on the engine side. However, it has been found that when driving w...

AI Technical Summary

Problems solved by technology

[0006] However, the technology of the above-mentioned Patent Document 1 is a clutch release technology for separating the engine from the drive system according to changes in output requirements, etc., rather than a technology for releasing the clutch due to excessive engine output.

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