# US 2014/0195097 A1 · Abnormality diagnostic apparatus for vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0195097 A1 - Document ID: US20140195097A1 - Status: Published application - Kind: A1 - Application number: 14/149,591 - Filed: 2014-01-07 - Published: 2014-07-10 - Earliest claimed: 2013-01-08 - Assignees: Mitsubishi Jidosha Kogyo Kabushiki Kaisha - Applicants: Mitsubishi Jidosha Kogyo Kabushiki Kaisha - Inventors: Yasuhiro YAMANAKA; Takashi NONAKA - Web page: https://patentgrep.com/patent/US20140195097A1 ## CPC - B60L 3/0023: {Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train} - B60L 50/16: with provision for separate direct mechanical propulsion - B60L 50/61: by batteries charged by engine-driven generators, e.g. series hybrid electric vehicles - B60L 58/12: responding to state of charge [SoC] - B60L 2220/42: with use of more than one motor - B60L 2240/527: Voltage - B60L 2240/547: Voltage - B60L 2250/16: by display - B60L 2260/28: Four wheel or all wheel drive - Y02T 10/62: Hybrid vehicles - Y02T 10/64: Electric machine technologies in electromobility - Y02T 10/70: Energy storage systems for electromobility, e.g. batteries - Y02T 10/7072: Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors - Y10S 903/903: having energy storing means, e.g. battery, capacitor - B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract An abnormality diagnostic apparatus for a vehicle, which can accurately determine whether or not there is an abnormality in a voltage detection unit, while curtailing a cost increase, is provided. Output voltages Va, Vb, Vc outputted from voltage detection units are acquired, and differences |Va−Vb|, |Vb−Vc|, |Vc−Va| between the acquired output values are calculated. If any of the calculation results is greater than a determination threshold value, it is determined that there is an abnormality in any of the voltage detection units. ## Claims ### Claim 1 An abnormality diagnostic apparatus for a vehicle, comprising: a battery loaded on a vehicle; a plurality of rotating electric machines electrically connected to the battery; a plurality of rotating electric machine control units for controlling the rotating electric machines; a plurality of voltage detection units, provided in the rotating electric machine control units, for detecting voltages of power lines connecting the battery and the rotating electric machines; a difference calculation unit for acquiring output values outputted from the voltage detection units and calculating differences between the acquired output values; and an abnormality determination unit which, when any of results of calculations by the difference calculation unit is greater than a preset determination threshold value, determines that there is an abnormality in any of the voltage detection units. ### Claim 2 (depends on 1) The abnormality diagnostic apparatus for a vehicle according to claim 1, wherein any of the plurality of voltage detection units is provided in such a manner as to be common to any of the plurality of rotating electric machine control units. ### Claim 3 (depends on 1) The abnormality diagnostic apparatus for a vehicle according to claim 1, wherein the abnormality determination unit determines whether or not there is an abnormality in the voltage detection unit, on condition that a shift range selected by a transmission, which the vehicle has, is a parking range or a neutral range. ### Claim 4 (depends on 2) The abnormality diagnostic apparatus for a vehicle according to claim 2, wherein the abnormality determination unit determines whether or not there is an abnormality in the voltage detection unit, on condition that a shift range selected by a transmission, which the vehicle has, is a parking range or a neutral range. ### Claim 5 (depends on 1) The abnormality diagnostic apparatus for a vehicle according to claim 1, wherein the abnormality determination unit determines whether or not there is an abnormality in the voltage detection unit, on condition that a shift range selected by a transmission, which the vehicle has, is a drive range, and that the rotating electric machine control unit is stopping. ### Claim 6 (depends on 2) The abnormality diagnostic apparatus for a vehicle according to claim 2, wherein the abnormality determination unit determines whether or not there is an abnormality in the voltage detection unit, on condition that a shift range selected by a transmission, which the vehicle has, is a drive range, and that the rotating electric machine control unit is stopping. ### Claim 7 (depends on 1) The abnormality diagnostic apparatus for a vehicle according to claim 1, further comprising a threshold value correction unit for making a correction for decreasing the determination threshold value in accordance with a state of the battery. ### Claim 8 (depends on 2) The abnormality diagnostic apparatus for a vehicle according to claim 2, further comprising a threshold value correction unit for making a correction for decreasing the determination threshold value in accordance with a state of the battery. ### Claim 9 (depends on 3) The abnormality diagnostic apparatus for a vehicle according to claim 3, further comprising a threshold value correction unit for making a correction for decreasing the determination threshold value in accordance with a state of the battery. ### Claim 10 (depends on 4) The abnormality diagnostic apparatus for a vehicle according to claim 4, further comprising a threshold value correction unit for making a correction for decreasing the determination threshold value in accordance with a state of the battery. ### Claim 11 (depends on 5) The abnormality diagnostic apparatus for a vehicle according to claim 5, further comprising a threshold value correction unit for making a correction for decreasing the determination threshold value in accordance with a state of the battery. ### Claim 12 (depends on 6) The abnormality diagnostic apparatus for a vehicle according to claim 6, further comprising a threshold value correction unit for making a correction for decreasing the determination threshold value in accordance with a state of the battery.