US 11,506,134 B1Granted

Control apparatus for electric vehicle

AssigneeMazda Motor Corporation

InventorHiroyuki Saito

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Abstract

Closing timing of an intake port is changed without using a variable valve timing mechanism. An electric vehicle includes an engine for electricity generation in which closing timing of an intake port maximizes intake air charging efficiency in a specific revolution speed region, a sensor which outputs a signal related to a revolution speed of the engine, a controller which drives the engine at a revolution speed based on the signal of the sensor, a requested electricity generation amount being satisfied at the revolution speed, and a motor which applies a positive or negative torque to the engine. When the engine is driven in a revolution speed region other than the specific revolution speed region, the controller uses the motor to apply a positive or a negative torque to the engine in an intake stroke to change the closing timing of the intake port to increase intake air charging efficiency.

Claims8

Dependent claims

A control apparatus for an electric vehicle, the control apparatus comprising:

an engine which is for electricity generation and in which a closing timing of an intake port is set such that intake air charging efficiency becomes a maximum in a specific revolution speed region;
a sensor which outputs an electric signal related to a revolution speed of the engine;
a controller which drives the engine at a revolution speed based on the electric signal of the sensor, a requested electricity generation amount being satisfied at the revolution speed;
and
a motor which applies a positive torque or a negative torque to the engine, wherein
when the engine is driven in a revolution speed region other than the specific revolution speed region, the controller uses the motor to apply a positive torque or a negative torque to the engine in an intake stroke such that the closing timing of the intake port is changed in a direction in which the intake air charging efficiency becomes high.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/738,215Filed 6 May 2022
Priority: JP JP2021-09109431 May 2021
Published: US 2022/0381190 A11 Dec 2022
Granted: 22 Nov 2022
Term ends: Not estimatedThe source records don’t support an estimate.

Classification23 codes

F02D 13/0234
Variable control of the intake valves only: changing the valve timing only
F02D 29/02
Controlling engines, such controlling being peculiar to the devices driven thereby, the devices being other than parts or accessories essential…
B60K 6/46
Characterised by the architecture of the hybrid electric vehicle: series type
F01L 1/34
Valve-gear or valve arrangements, e.g. lift-valve gear: characterised by the provision of means for changing the timing of the valves without…